NC0025453_Draft Permit (Modification)_20230815

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
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
August 15, 2023
Subject: Draft NPDES Permit Modification
Permit NCO025453
Little Creek WRF
Johnston County
Grade IV Biological WPCS
SIC Code 4952
The Division of Water Resources staff has reviewed your May 11, 2023 request for modification of the
Little River WRF's NPDES permit to revise the City's Total Nitrogen loading limitation at the 2.5 MGD
flow tier from 22,832 lb/yr to 26,636 lb/yr to accommodate for an increase in nitrogen loading to the facility
experienced over the past year and to reflect the technology -based maximum equivalent Total Nitrogen
concentration of 3.5 mg/L set forth in 15A NCAC 2B .0713(8)(d). The resultant change is an active loading
of 26,636 lb/yr and a reserve loading of 67,010 lb/yr of Total Nitrogen at the 2.5 MGD flow tier. Please
note that this modification also includes correction of active and reserve allocations and offset credits at the
6.0 MGD flow tier that were improperly denoted during the January 2020 modification. Enclosed with this
letter is a copy of the Draft NPDES permit modification for your facility, with revisions to Section A.(1.)
Effluent Limitations and Monitoring Requirements [2.5 MGD] and Special Condition A.(8.) Total Nitrogen
Allocations and Offset Credits. Please review this draft carefully to ensure thorough understanding of the
requirements and conditions it contains.
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/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 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 receipt of this draft permit.
Following the 30-day public comment period, the Division will review all pertinent comments and take
appropriate action prior to issuing a final permit. If you have questions concerning this draft permit,
please call me at [phone] or by email at [e-mail].
Sincerely, DoeuSIgned by:
[;4�� t e.
A4FBFCA14FD
Nick Coco, P
NPDES Municipal Permitting Unit
Hardcopy: NPDES Files
Ecopy: US EPA Region 4
DWR/Raleigh Regional Office/Water Quality/Scott Vinson & Vanessa Manuel
DWR/Basin Planning Branch/Nora Deamer
DWR/Public Water Supply/Shawn Guyer
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
a..M919.707.9000

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Permit NCO025453
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 Wager 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............................................................... F„ b ,1, 2024 January 1, 2024.
This permit and authorization to discharge shall expire at midnight on ............................. March 31, 2024.
Signed this day Jannnnar-,­4 ; 2tL20 ?vlonth, xx 2023.
DRAFT
(or Richard E. Rogers, Jr., Director
Division of Water Resources
By Authority of the Environmental Management Commission
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Permit NCO025453
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDE5 Permits issued to thins fitcilihj, whether for operation or discharge are hereby revoA-ed. As a/'
this permit issuance, any previously issued permit lvating this number is no longer e*ctive. Ttu<refvre, the
exclusive aWhorihj to operate and disclutrge from this fncility arises under tltc perntit conditions, requirements,
terms, and provisiows, included herein.
l'he Town of Clayton
is hereby authorized to:
1. Continue to operate and maintain an existing 2.5 MGD wastewater treatment facility consisting of
the following components:
• mechanical screening and grit removal system,
• influent pump station
• 214,500 gallon anaerobic basil,
• 300,000 gallon anoxic tank,
• oxidation basin No. 2,
• 200,000 gallon anoxic tank
• oxidation basin No.1,
three (3) secondary clarifiers,
• two tertiaiv filters,
• ultraviolet disinfection with back-up chlorination/dechlorination,
• 90,000 gallon aerated digester/sludge stabilization tank,
• 360,000 gallon sludge holding tank,
• 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 to 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 neap via Outfall 001
into the Neuse River, classified WS-IV, NSW, CA waters in the Neuse Rivet' Basin.
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Permit NCO025453
PART
A.(1.) EPFLUENT LIMITATIONS AND MONITORING REQUIREMENTS 12.5 MGDj
[15A NCAC 02B .0400 et seq.,15A NCACO2B .0500 et seq.] Grade IV
Biological Water Pollution Control System 115A NCAC 08G .0302]
a. During the period beginning on the effective date of the permit and lasting until expiration, the
pe.nuittee is authorized to discharge treated municipal and industrial wastewater from Outfall
001. Such discharges shall be limited and rnornitoredr by the perinittee as specified below:
PARAMETER
Parameter Code
EFFLUENT LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Majdmum
Measurement
Frequency
Sample
Type
Sample
LocaUon2
Flow 50050
_.._._....._......................_ ._.........m......_...- _...._........_.,
Total Monthly Flow MG 82210
2.5 MGD
_.. _ ............._.._ _....._._.........__. ..
Monitor and R
Continuous
_...........
Monthly
Recording
__..
Calculated
_. I or E
E
SOD, 5 day, 20°C3 C0310
(April 1- October 31)
5.0 mg/L
7.5 mg/L
2/week3
Composite
I and E
SOD, 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 Solids' C0530
30.0 mg/L
45.0 mg/L
2/week9
Composite
I and E
NH3 as N C0610
(Apr 1- Oct 31)
1.0 mg/L
3.0 mg/L
2/week-
Composite
E
NHs as N C0610
(Nov 1- Mar 31)
2.0 mg/L
6.0 mg/L
2/week"
Composite
E
Fecal Coliform 31616
(geometric mean)
200/100 mL
400/100 mL
2/week$
Grab
E
Dissolved en 00300
Dar WL
Dally
Grab
E
pH 00400
Between 6.0 and 9.0 Standard Units
Dally
Grab
E
Tem ture °C 00010
Monitor and Report
Dally
Grab
E
Total Residual Chlorine' 50060
1 28 N
Daily
Grab
E
Conductivity (pmhos/cm) 00094
Monitor and Report
Dally
Grab
E
Total Phosphorus JL C0665
2.0 L Quartert A
Weddy
Composite
E
TKN (mg/L) 006.25
Monitor and Report
Weeldy
Composite
E
NO3-N + N N ( 00630
Total Nitrogen' (mg/L) C0600
Monitor and Report
Monitor and Report
Weekly
Weekly
Composite
Calculated
E
E
TN Load 9A0 QM600
QY600
Monitor and Report (lb/month)
22,832 20,0§ Ib/yr
Monthly
Annually
Calculated
E
Bis (2-ethylhe ) phthalate ( L 39100
Monitor and Report
Quarterly
Composite
E
Chronic Tox1cW TGP38
Monitor and Report
Quarterly
Composite
E
Pollutant Scan' NC171
Monitor and Report
Footnote 7
Footnote 7
E
Hardness" -Total as CaCO3 L 009M
Monitor and Report
Quarterly
Composite
E
Hardness" -Total as CaCO3 (mg/L) 009LV
Monitor and Report
Quarterly
Grab
U
Dissolved oxygen (mg/L) 003W
Monitor and Report
Variable'
Grab
U and D
Temperature °C 00010
Monitor and Report
Variable2
Grab
U and D
Conductivity pmhos/cm) 00094
Monitor and Report
Varlable2
Grab
U and D
Fecal Coliform (#/100mL) 31616
(geometric mean
Monitor and Report
VariabW
Grab
U and D
Footnotes:
1. The pennittee shall subunit Discharge Monitoring Reports electronically using NC D1h'R's eDMR application
system. See Special Condition A. (9.).
Footnotes continue on the next paee.
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Permit NCO025453
Footnotes continued from A. 0.) Effluent Limitations and Monitoring Requirements:
2. Sample locations I -Influent, E-Effluent, U-Upstream = at NCSR 1700, D-Downstream = (1) NC HVVY 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 iumnediately 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 TRC limit and monitoring requirements apply only if chlorine is used as a disinfectant (or elsewhere in
the process)_ The Division shall consider all effluent total residual chlorine values reported below 50 µg/l to
be in compliance with the permit. However, the permittee shall continue to record and submit all values
reported by a North Carolina certified laboratory (including field certified), even if these values fall below 50
µg/l.
5. 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, Jnme, September, and December. See
Special Condition A. (4.).
7. The permittee shall perform three effluent pollution scans during the terns of this permit. See Special
Condition A. (5.).
8. Twice per week sampling must occur on any two non-consecutive days during the calendar week
9. TN Load is the mass load of TN discharged by the permittee in a period of time. See Special Condition A. (6).
10. Compliance with these limits shall be determined in accordance with Special Condition A. (7.), Aruival Limits
for Total Nitrogen.
11. The permittee shall sample ursheam 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
sannple hardness at the nearest upstream location, at a nniinimum frequency of quarterly, and the pernnittee
has obtained approval from DWR-N`PDES Permitting Unit that the upstream station being monitored by the
coalition is representative of the receiving stream for this discharge. The permittee is responsible for
strbnnitting 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. Q.). 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.
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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 .O302j
a. Beginning upolr the Division's acceptance of an Engineer's Certification of conipletion of the
expansion to 6.0 :MGD and lasting tuitil expansion alcove 6.0 MGD or perinit expiration,
whichever conies first, the Perinittee is authorized to discharge heated wastewater from Out 'M1l
001. Such discharges shall be limited and monitored, by the Pennittee as specified below:
EFFLUENT LIMITS
MONITORING REQUIREMENTS
PARAMETER
Monthly
Weeidy
Daily
Measurement
Sample
Sample
Parameter Code
Average
Average
Maximum
frequency
Type
Locatlonz
Flow 50050
6.0 MGD
Continuous
Recording
I or E
Total Monthly Flow (MG) 82220
Monitor and R
Monthly
Calculated
E
SOD, S day, 20°C3 CO310
(April 1- October 31)
5.0 mg/L
7.5 mg/L
2/week'
Composite
I and E
SOD, S day, 200C3 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
2/week'
Composite
I and E
NH3 as N CO610
(Apr 1- Oct 31)
1.0 mg/L
3.0 mg/L
2/weelO
Composite
E
NH3 as N CO610
(Nov 1- Mar 31)
2.0 mg/L
6.0 mg/L
2/week-
Composite
E
Fecal Colifonn 31616
200/100 ml
400/100 mL
2/week'
Grab
E
(geometric mean
Dissolved Oxygen 00300
Dally Average >_ 6.0 /L
Dal
Grab
E
pH 00400
Between 6.0 and 9.0 Standard Units
Daily
Grab
E
Tem ature 0C 00010
Monitor and Report
Daily
Grab
E
Total Residual Chlorine' 50060
_ 28 /L
Daily
Grab
E
Conductivity pmhos/am) 00094
Monitor and Report
Daily
Grab
E
W
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 /L 00630
Monitor and Report
Weeldy
Composite
E
Total Nitrogen' (mg/L) C0600
Monitor and Report
Weekly
Calculated
E
TN Load 10.11 0M600
Monitor and Report (lb/month)
Monthly
Calculated
E
QY600
Limited: See Footnote 6
Annually
Bis (2-ethylphthalate L 39100
Monitor and Report
Quarterty
Composite
E
Chronic Toxicity' TGP38
W
Monitor and Report
Quarterly
Composite
E
Pollutant Scan° N01
Monitor and Report
Footnote 8
Footnote 8
E
Hardness32 -Total as CaCO3 L 00900
Monitor and Report
Quarterly
Composite
E
Hardness32 -Total as CaCO3 (mg/L) O0.9010
Monitor and Report
Quarterly
Grab
U
Dissolved en /L 003W
Monitor and Report
Variable2
Grab
U and D
_U
Temperature °C 00010
Monitor and Report
Variable=
Grab
and D
Conductivi mhas/cm 00094
Monitor and Report
Variable2
Grab
U and D
Fecal Coliform (#/IOOmL) 31616
Monitor and Report
Varlable2
Grab
U and D
(geometric mean)
Footnotes:
1. The penrtittee shall submit Discharge Ivionitoriiig Reports electronically using NC DATR's eDMR application
systeni. See Special Condition A. (9.).
Footnotes continue on the next Rage.
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Permit NC0025453
Footnotes continued from previous page:
2. Sample locations I -Influent, E-Effluent, U-Upstream a at NCSR 1700, D-Downstream = (1) NC HIVY 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 innstreann sampling requirements are immediately reinstated.
3. The monthly average effluent BODS and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent value (85% removal).
4. The TRC limit and monitoring requirements apply only if chlorine is used as a disinfectant (or elsewhere in
the process). The Division shall consider all effluent total residual chlorine values reported below 50 ug/I to
be in compliance with the permit. However, the pennittee shall continue to record and subunit all values
reported by a North Carolina certified laboratory (including field certified), even if these values fall below 50
jig/I.
S. 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 NO2-1N are Nitrate and Nitrite Nitrogen, respectively.
6. Upon Division acceptance of the Engineer's Certification of expansion to 6.0 MGD, and lasting through
December 31 of the sauce calendar year, the TN Load limit shall be 22,832 lb/yr. Thereafter, the TN Load linnit
shall be 63,926lb/yr.
7. Chronic Toxicity (Ceriodaphnia dubia) P/F at 4.8% with testing in March, June, September, and December.
See Special Condition A. (4.).
8. The permittee shall perform three effluent pollution scans during the terns of this permit. See Special
Condition A. (5.).
9. Twice per week sampling must occur on any two none -consecutive days during the calendar week
10. TN Load is the mass load of TN discharged by the pernuttee in a period of time. See Special Condition A. (6.).
11. Compliance with these limits shall be determined it accordance with Special Condition A. (7.), Annual Limits
for Total Nitrogen.
12. The pennittee shall sample insheam 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 instrear 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 stream for this discharge. The pennittee is responsible for
submitting instream hardness test results with its DMR5 as results are received front the coalition. If coalition
membership is cancelled or the Monitoring Coalition terminates instream hardness sampling at the approved
station, the pennittee 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 perforated in conjunction
with testing for hardness dependent metals (cadmium, copper, head, nickel, silver, and zinc).
b. There shall be no discharge of floating solids or visible foam in other than trace amounts.
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Permit NCO025453
A.(3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [10.0 MGD]
[15A NCAC 02B .0400 et seq.,15A NCACO2B .0500 et seq.] Grade TV
Biological Water Pollution Control System 115A NCAC 08G .0302J
a. Beginning upon the Division's acceptance of an Engineer's Certification of completion of the
expansion to 10.0 MGD and lasting until permit expiration, the Pennittee is authorized to
discharge treated wastewater tronl Oflf/n!l 001. Such discharges shall be limited and )Monitored'
by the Peimittee as specified below:
PARAMETER
ParameterCodeAverage
EFFLUENT LIMITS
MONITORING REQUIREMENTS
Monthly
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Locatlon2
Flow 50050
10.0 MGD
Continuous
Recording
I or E
Total Monthly Flow (MG) 82220
Monitor and R
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
SOD, 5 day, 20°C3 C0310
(November 1- March 31)
10.0 mg/L
15.0 mg/L
2/week'
Composite
1 and E
Total Suspended Solids3 C0530
30.0 mg/L
45.0 mg/L
2/week-
Composite
I I and E
NH3 as N C0610
(Apr I- Oct 31)
1.0 mg/L
3.0 mg/L
2/weeks
Composite
E
NH3 as N C0610
(Nov 1- Mar 31)
2.0 mg/L
6.0 mg/L
2/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 /L
Daily
Grab
E
pH 00400
Between 6.0 and 9.0 Standard Units
Daily
Grab
E
Tem ature °C 00010
Total Residual Chlorine S0060
Monitor and Report
28 /L
Dal
Daily
Grab
Grab
E
E
Conductivity (pmhos/cm) 00094
Monitor and R
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 /L) 00630
Monitor and Report
Weeldy
Composite
E
Total Nitrogen' (mg/L) C0600
Monitor and Report
Weekly
Calculated
E
TN Load 10,31 Q14600
Qy6A0
Monitor and Report (lb/month)
Limited: See Footnote 6
Monthly
Annually
Calculated
E
Bis 2-eth I phthalate (pW9 39100
Monitor and Report
Quarterly
Composite
E
Chronic Toxicity' TGP38
Monitor and Report
Quarterly
Composite
E
Pollutant Scan" N01
Monitor and Report
Footnote 8
Footnote 8
E
Hardness12 -Total as CaCO3 L 00900
Monitor and Report
Quartedy
Composite
E
Hardness12 -Total as CaCO3 (mg/L) 00900
Monitor and Report
Quarterly
Grab
U
Dissolved Oxyen„ (m�JL� 00300
Temperature °C 0A010
Monitor and Report
Monitor and Report
Variable=
Variable=
Grab
Grab
U and D
U and D
Conductivity ( mhos/cm) 00094
Monitor and Report
Variable=
Grab
U and D
Fecal Coliform (#/100mL) 31616
(geometric mean)
Monitor and Report
Varlable2
Grab
U and D
Footnotes:
1. The penuittee shill subnut Discharge Moiutoiting Reports electroiucally usingNC Di'VR's eDNIR application
system. See Special Condition A. (9.).
Footnotes continue on the next page.
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Permit NC0025453
Footnotes continued from previous page:
2. Sample locations I -Influent, E-Effluent, U-UpStream = at NCSR 1700, D-Downstream = (1) NC HVVY 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 per n-duee'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 TRC limit and monitoring requirements apply only if chlorine is used as a disinfectant (or elsewhere in
the process). The Division shall consider all effluent total residual chlorine values reported below 50 µg/1 to
be in compliance with the permit. However, the pennittee 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 + NOa-N + NOrN, where TN is Total Nitrogen, TKN is Total
Kjeldahl Nitrogen, and NOa-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively.
6. Upon Division acceptance of the Engineers Certification of expansion to 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 89,842lb/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 Spectral Condition A.
11. Compliance with these limits shall be determined in accordance with Special Condition A. (7.), Annual Limits
for Total Nitrogen.
12. The permmittee shall sample instream hardness upstream of the facility's discharge. The sample shall be
representative of the hardness in the stream. If the pernnittaee 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 stream for this discharge. The pennittee 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 pennittee 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 cmijunction
,.vith 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.
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A.(4.) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY) [15A NCAC 02B.02001
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, qynrterlil monitoring using test procedures outlined in
the "North Carolina Ccriodapltnia Chronic Effluent Bioassay Procedure," Revised December 2010, or
subsequent versions or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"
(Revised- December 2010) or subsequent versions. The tests will be performed during the months of
March, June, September, and December. These months signify the first month of each three-month
toxicity testing quarter assigned to the facility. Effluent sampling for this testing must be obtained
during representative effluent discharge and shall be performed at the NPDES permitted final effluent
discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV
below the permit limit, then multiple -concentration testing shall be performed at a minimum, in
each of the two following months as described in "North Carolina Phase 1I Chronic Whole Effluent
Toxicity Test Procedure" (Revised -December 2010) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered electronically using
the Division's eDMR system for the month in which tests were performed, using the parameter code
TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally, DWR Form AT-3
(original) is to be sent to the following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, NC 27699-1621
Or, results can be sent to the entail, [e-mail].
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30
days after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved
designate signature. Total residual chlorine of the effluent toxicity sample must be measured and
reported if chlorine is employed for disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is
required, the penmittee 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 conunent area of the form. The report shall be submitted
to the Water Sciences Section at the address cited above
Should the permnittee 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 performied by the North Carolina
Division of Water Resources indicate potential impacts to the receiving stream, this permit may be re-
opened and modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum
control organism survival, minimum control organism reproduction, and appropriate environmental
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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-chbroethyl) ether
Chkxine (total reskiuel, TRC)
1, 1 -dichloroethylene
Bis (2-chbroisopropyl) ether
Dissolved oxygen
1,2-dichloropropane
Bis (2-ethyihexyl) phthalate
Nitrate/Nitrite
1,3-dichloropropylene
4-bromophenyl phenyl ether
Kleldahl nitrogen
Ethylbenzene
Butyl benzyl phthalate
Oil and grease
Methyl bromide
2-chloronaphthalene
Phosphorus
Methyl chloride
4-chiorophenyl phenyl ether
Total dissolved sdkis
Methylene chloride
Chrysene
Hardness
1,1,2,2-tetrachloroethane
DI-n-butyl phthalate
Antimony
Tetrachloroethylene
Di-n-octyl phthalate
Arsenic
Toluene
Dibenzo(a,h)anthracene
Beryllium
1,1,1-trichloroethane
1,2-dichlorobenzene
Cadmium
1,1,2-trichioroethane
1,3-dichbrobenzene
Chromium
Trichloroethylene
1,4-dichbmbenzene
Copper
Vinyl chloride
3,3-dichbrobenzidine
Lead
Acid -extractable compounds,
Diethyl phthalate
Mercury (EPA Method 1631E)
P-chioro-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-dinitrophenoi
Fluorene
Cyanide
2-nitrophenol
Hexachiorobenzene
Total phenolic compounds
4-nitrophenol
Hexachlorobutadiene
VbMtile oraan)c compounds:
Pentachiorophenol
Hexachlorocydo-pentadiene
Acrolein
Phenol
Hexachloroethane
Acrylonitrlle
2,4,6-trichlorophenol
Indeno(1,2,3-cd)pyrene
Benzene
Base -neutral comeounds:
Isophorone
Bromoform
Acenaphthene
Naphthalene
Carbon tetrachloride
Acenaphthylene
Nitrobenzene
Chlorobenzene
Anthracene
N-nitrosodi-n-propylamine
Chiorodibromomethane
Benzidine
N-nftrosodimethylamine
Chloroethane
Benzo(a)anthracene
N-nitrosodiphenylamine
2-chloroethylvinyl ether
Benzo(a)pyrene
Phenanthrene
Chloroform
3,4 benzofluoranthene
Pyrene
Dichlorobromomethane
Benzo(ghi)perylene
1,2,4-trichlorobenzene
1,1-dichloroethane
Benzo(k)fluoranthene
1,2-dichloroethane
Bis (2-chloroethoxy) methane
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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 31a 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 122.210)(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 annually in
the four and one half year period prior to the application. These tests shall be performed for acute or
chronic toxicity, whichever is specified in this permit. The multiple species toxicity test results shall be
filed with the Aquatic Toxicology Branch at the following address:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Secs ice Center
Raleigh, North Carolina 27699-1621
Contact the Divisions 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 Muunicipal Application Form 2A, when submitting the permit renewal
application to the NPDES Permitting Unit.
A.(6.) CALCULATION OF TOTAL NITROGEN LOADS (G.S.143-215.1(b)]
a. The peimittee shall calculate monthly and annual TN Loads as follows:
i. Monthly TN Load (lb/mo) - TN x TMF x 8.34
where:
TN = the average Total Nitrogen concentration (mg/L) of the
composite samples collected during the month
TMF - 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.
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A.(7.) ANNUAL LIMITS FOR TOTAL NITROGEN [GS.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 TNI 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-pernttee 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 Load limit, and each day of a
continuing violation shall constitute a separate violation.
d. The TN load limit in this Permit (if anv) may be modified as the result of allowable changes in
the permittee's TN allocation.
i. Allowable changes include those. resulting from purchase of TN allocation from the
Wetlands Restoration Fund; purchase, sale, trade, or lease of allocation between the
pernittee and other dischargers; regionalization; and other transactions approved 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 permit 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:
NCDIN'R / 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 considered 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 mutually and in
accordance with state and federal program requirements.
iii. If the pernittee intends to join or leave a compliance association, the Division must be
notified of the proposed 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.
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.
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A.(8.) TOTAL NITROGEN ALLOCATIONS AND OFFSET CREDITS [G.S.143-215.1(b)]
a. The following table lists the Total Nitrogen (TN) allocatioiis and offset credits assigned to,
acquired by, or transferred to or htom 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-
Pern- ittee Member.
Table 1. Allocations and Offset Credits - 2.5 MGD
ALLOCATION/ CREDITS
ALLOCATION/
SOURCE
DATE
AMOUNT (lb/yr)'
STATUS
CREDITS TYPE
Estuary
DLscharge
Base Allocation
Assigned by Rule z
12/7/97; 4/1/03
10,700
21,400
Active
3,668
7,336
Reseri+e M.-
Supplemental
Purchased from South
7/5/06
5
1,94Fi
Alive
Allocation
Granville WSA (NC0026824)
Purchased from UNIFi-
Supplemental
1,645
3,290
Mixed Active
Allocation
Kinston
8/30/2007
746
4 432
; Active
(NC0003760)
M
14858
Reserve
Purchased from
TN Offset Credits
RS-Flat Swamp, LLC (Flat
9/4/2020
15,908 3,^
31,816 4
Reserve
Swamp Mitigation Bank)
Supplemental
Purchased from International
9/30/2020
13,000
26,000
Reserve
Allocation
Paper, NCOOD3191
TOTAL
44,921
89,842
Mixed
#1,44613,318
2a,832-26,636
Active
33;5{15 ..1.(zQ
67;810 6.1206
Reserve
See footnotes below.
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Table 2. Allocations and Offset Credits - 6.0 MGD
ALLOCATION/ CREDITS
ALLOCATION/
SOURCE
DATE
AMOUNT (lb/yr)'
STATUS
CREDITS TYPE
Estuary
—
Discharge
Base Allocation
Assigned by Rule' _.__. (_12/7/97;
4/1/03
10,700
21,400
Active
Supplemental
Purchased from South Granville
7/5/06
3,668
7,336
Resewe Aetive
Allocation
WSA (NCD026824)
Supplemental
Purchased from UNIFI-Kinston
_
W 8/30/2007
1,645
3,290
Active
Allocation
(NC0003760)
Purchased from
TN Offset Credits
RS-Flat Swamp, LLC (Flat Swamp
I 9/4/2020
15,908 3A
31,8164Reserve
Active
Mitigation Bank)
13,000
26,000
Mixed
Supplemental
Purchased from International
TPaper,
9/30/2020
42
84
Active
Allocation
NC0003191
_12 K-8
25_ 5
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 (lb/yr)'
STAB
CREDITS TYPE
Estuary
Discharge
Base Allocation
Assigned by Rule
12/7/97; 4/1/03
10,700
21,400
Active
Supplemental
Purchased from South Granville
7/5/06
3,668
7,336
Active
Alkxatlon
WSA (NCD026824)
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'
Active
Mitigation Bank)
Supplemental
Purchased from International
9/30/2020
13,000
26,000
Active
Allocation
Paper, NCO003191
TOTAL
44,921
0,842
Active
Footnotes:
1. Transport Factor - 50%. Values are displayed to the nearest pound per year.
2. 15A NCAC 02B .0713 (fortnerly 02B .0234)
3. The Pern►ittee purchased offset credits in the amount of 715,858.18 lb IX or 23,861.941b/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 Pernrittee,
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 Pennittee are, for the
purposes of this permit, equivalent to 31,815.921b/yr for 30 years at the Pertnittee's discharge location.
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b. Anv 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 following sections within Pant II of this
permit (Standard Cotiditions for NPDES Per►itits):
• Section B. (11.) Signatory Requirements
• Section D. (2.) Reporting
• Section D. (6.) Records Retention
• Section E. (5.) Monitoring Reports
1. Reporting Requirements [Supersedes Section D. (2.) and Section E. (5.) (a)1
The per mittee shall report discharge monitoring data electronically using the NC DWR's Electronic
Discharge Monitoring Report (eDMR) internet application.
Monitoring results obtained during the previous nionth(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), pennittees 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 address:
NC DEQ / Division of Water Resources / Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh, North Carolina 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 oil December 21, 2020, the pennittee must electronically report the following compliance
monitoring data and reports, when applicable:
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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. T1ne 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 (see "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 resouuces to identify the
initial recipient for the electronic submission.
Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity
(EPA or the state authorized by EPA to implement the NPDES program) that is the designated
entity for receiving electronic NPDES data [see 40 CFR 127.2(b)].
EPA plans to establish a website that will also link to the appropriate electronic reporting tool for
each type of electronic submission and for each state. Instructions on how to access and use the
appropriate electronic reporting tool will be available as well. Information on EPA's NPDES
Electronic Reporting Rule is found at:
ht s: www,fedeialre ister. ov doLtitiieants 2015 10 22 2015-24954 natiornal- ollutannt-
dischar e-eL4nu ation-system-iit)dies-electronic-reetu' ng-rule
Electronic submissions must start by the dates listed in the "Reporting Requirements" section
above.
3. How to Request a Waiver from Electronic Reporting
The permittee may seek a temporary electronic reporting waiver from the Division. To obtain an
electronic reporting waiver, a permittee must first submit an electronic reporting waiver request to
the Division. Requests for temporary electronic reporting waivers must be submitted in writing to
the Division for written approval at least sixty (60) days prior to the date the facility would be
required under this permit to begin submitting monitoring data and reports. T'lne duration of a
temporary waiver shall not exceed 5 years and shall thereupon expire. At such time, monitoring
data and reports shall be submitted electronically to the Division unless the permittee re -applies for
and is granted a new temporary electronic reporting waiver by the Division. Approved electronic
reporting waivers are not transferable. 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:
11 -): de .nnc. ov about divisions water -resources ednnr
4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)l
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part
II, Section B. (11.)(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.
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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
Caroiuia's eDMR system, registering for eDMR and obtaining an eDMR user account, please visit
the following web page:
littp:/ / deq.iic.gov/ about/ divisions/ water -resources/ eduir
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:
"1 certifij, under penalty gf1(m), Mat this document and all attaclmtents were prepared under nnl direction or
sulyenfision in accordanM with a Siptetn designed to assure that qualified personnel properky gather turd
etmduate the infarntntion submitted. Based on my huluiny ol'the perm or persons who manage the systent, or
those persons directly responsible for gathering t1c hitortnation, the itifannation sulnnitted is, to the best of my
knotnledge and belief, true, accurate, and connplete. I am auvre that there arc. significant penalties for submitting
false information, including the possihilitp of fines and intprisontnent for knou4ng z4olatious."
S. Records Retention [Supplements Section D. (6.)1
The permittee shall retain records of all Discharge Monitoring Reports, including eDMR
submissions. These records or copies shall be maintained for a period of at least 3 years from the
date of the report. This period may be extended by request of the Director at any time [40 CFR
122.41].
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Permit NCOO25453
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