NC0026573_Draft Permit_20211026

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ROY COOPER'4�
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Governor t Or
ELIZABETH S.BISER
Secretary �0---- �-
S.DANIEL SMITH NORTH CAROLINA
Director Environmental Quality
October 26, 2021
City of Morganton
Attn: Eli Self, Superintendent and ORC
P.O. Box 3448
Morganton,NC 28680
Transmitted via email to [e-mail]
Subject: Draft NPDES Permit Renewal
Permit NC0026573
Catawba River Pollution Control Facility
Burke County
Facility Grade IV(8.0, 10.5,and 13.0 MGD)
SIC Code 4952
Dear Permiee:
Enclosed with this letter is a copy of the Draft NPDES permit renewal for the Catawba River
Pollution Control Facility (Facility). Please review this draft carefully to ensure a thorough
understanding of the requirements and conditions it contains. There are a few changes from the
existing permit,including the following:
• Facility components listed on the Supplement to Permit Cover Sheet were adjusted
according to the flow process diagram provided with the permit application renewal.
• Authorization language on the Supplement to Permit Cover Sheet was adjusted consistent
with language on top of Sections A. (1.),A. (2.),and A. (3.).
• Parameter codes and Facility's Grade were included in the Effluent Limitations and
Monitoring Requirements tables. [See Sections A. (1.), A. (2.),and A. (3.)].
• The outfall coordinates were updated throughout the permit according to the locations
provided by the Permiee in the permit application renewal process.
• For consistency with the use of the current 7Q10,this renewal uses a summer 7Q10 of 118
cfs for the limit pages for 8.0 MGD, 10.5 MGD, and 13.0 MGD.
• The results of instream waste concentration (IWC)-based calculations for ammonia-
nitrogen, ammonia nitrogen limits have been changed to reflect appropriate limits for the
8.0 MGD flow tier [See A.(1.)].
• The Division is implementing dissolved metals standards in all permits, per the 2016
revisions to State water quality standards. As such, the NPDES Permitting Unit will need
site-specific effluent hardness data and instream hardness data upstream of the discharge
for each facility monitoring these metals to calculate permit limitations. Effluent hardness
and instream hardness sampling upstream of the discharge,have been added to the permit
at a monitoring frequency of quarterly. [See Sections A. (1.),A. (2.), and A. (3.)].
• Based on the reasonable potential analysis (RPA) predicting a maximum effluent copper
concentration that is greater than the allowable discharge concentration based on state
water quality standards, limit and monthly monitoring for copper has been added to the
permit [See Sections A. (1.), A. (2.), and A. (3.) ].
D North12North Carolina
Salisb Department of1617 EnvironmentalMailServiceCenter l Quality I DivisionNorth of WaterCarolina Resources
ury Street 1 Raleigh, 699-1617
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To provide an opportunity for the City to develop a plan to assess sources of copper to
come in compliance with the limit in Section A. (1.), a 3-year schedule of compliance has
been added to the permit [See Special Condition A. (9.) Schedule of Compliance for
Copper Limitations].
• Based on the RPA predicting a maximum effluent concentration that is greater than the
allowable discharge concentration based on state water quality standards, quarterly
monitoring for antimony and silver have been added to the permit for 8.0 MGD, 10.5 MGD,
and 13.0 MGD [See Sections A. (1.),A. (2.), and A. (3.)].
• The City of Morganton reported total silver at less than detection, with detection levels of
< 1.0 µg/L,<2.5 µg/L,and<6.0 µg/L,in the Effluent Pollutant Scans(EPS)and discharge
monitoring reports (DMRs). Based on the RPA,the City's total silver allowable discharge
concentration is 0.31 µg/L. The DWR's laboratory identifies the target Practical
Quantification Limit (PQL) for silver as 1.0 µg/L. 15A NCAC 2B .0505 (e) (4) requires
that all test procedures must produce detection and reporting levels that are below the
permit discharge requirements, and all data generated must be reported to the approved
detection level or lower reporting level of the procedure. If no approved methods can
achieve a detection level below the permit discharge requirement (or allowable discharge
concentration),the method with the lowest detection level must be used.
• Based on the RPA predicting a maximum effluent zinc concentration that is greater than
the allowable discharge concentration based on state water quality standards, quarterly
monitoring for zinc has been added to the permit for 10.5 MGD and 13.0 MGD. [See
Sections A. (2.), and A. (3.)].
• Based on the RPA predicting a maximum effluent selenium concentration greater than the
allowable discharge concentration based on state water quality standards, quarterly
monitoring for selenium has been added to the permit for 13.0 MGD [See Section A. (3.)].
• In order for the Permittee to calculate the total nitrogen (TN) and total phosphorous (TP)
loads,the total monthly flow(TMF)of wastewater discharged during the month is needed;
therefore, monitoring and reporting for TMF has been added for 10.5 MGD, and 13.0
MGD. [See Sections A. (2.), and A. (3.)].
• The effluent limit table for 10.5 MGD was updated to include annual total nitrogen (TN)
and total phosphorous (TP) loads, Total Kjeldahl Nitrogen(TKN), and Nitrite and Nitrate
(NO2 +NO3). The annual TN and TP load limit calculated for 13.0 MGD is set for 10.5
MGD until a final nutrient TMDL for the Catawba River Basin is concluded. [See Section
A. (2.)].
• Based on the need to assess aluminum in the RPA and calculate a specific water quality
standard for aluminum, quarterly monitoring for aluminum and dissolved organic carbon
has been added to the permit [See Sections A. (1.), A. (2.), and A. (3.)].
• Language has been added to require the submittal of discharge monitoring reports
electronically using NC DWR's eDMR application system [See Sections A. (1.), A. (2.),
and A. (3.) Footnote 1].
• Language has been added to update information about upstream and downstream sampling
locations according to the locations provided by the Permittee in the permit application
renewal process. [See Sections A. (1.), A. (2.), and A. (3.)Footnote 2].
• Language has been added to include information on monitoring coalition programs. [See
Sections A. (1.),A. (2.),and A. (3.)Footnote 8].
• Special Condition A. (6.) includes the specific three years in which the Effluent Pollutant
Scan shall be performed (2023, 2024, and 2025) and has requirements for proper
completion of annual pollutant scan in the eDMR system.
Page 2 of 3

made concerningthe Electronic Reporting Rule — NPDES Electronic
• A notation was p g
Reporting Rule—Phase 2 Extension. EPA extended the Phase 2 deadline to December 21,
2025. [See Special Condition A. (7.)].
• Federal regulations require the electronic submittal of all discharge monitoring reports
(DMRs)and program reports. The requirement to continue reporting discharge monitoring
data electronically using the NC DWR's Electronic Discharge Monitoring Report(eDMR)
interne application has been added to your NPDES permit[See Special Condition A. (7.)].
The NPDES standard conditions (Parts II, III, and IV), 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 Burke 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 contact me at(919) 707-9130 or by email at [e-mail].
Sincerely,
Diana Yit arek,Engineer
NPDES Municipal Permitting Unit
Hardcopy: NPDES Files
Ecopy: US EPA Region 4
City of Morganton/Sandy Sally W
Catawba RPCF Pretreatment/Tim Arney
DWR/Asheville Regional Office/Water Quality/Linda Wiggs and Tim Heim
DWR/Municipal Permitting Unit/Keyes McGee and Charlie Miller
DWR/Aquatic Toxicology Branch/Zach Thomas and Cindy Moore
DWR/Public Water Supply/Kimberly Barnett and Nicole Hairston
DWR/Operator Certification Program/Maureen Kinney
Page 3 of 3

Permit NC0026573
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
• DRAFT 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
City of Morganton
is hereby authorized to discharge wastewater from a facility located at the
Catawba River Pollution Control Facility
1000 Vine Arden Road,Morganton,NC 28655
Burke County
to receiving waters designated as the Catawba River in the Catawba River Basin, in accordance with effluent
limitations,monitoring requirements,and other applicable conditions set forth in Parts I,II,III,and IV hereof.
This permit shall become effective: Month DD,2021.
This permit and authorization to discharge shall expire at midnight on February 26, 2026.
Signed this day: Month DD,2021.
DRAFT
for S.Daniel Smith, Director
Division of Water Resources
By Authority of the Environmental Management Commission

Permit NC0026573
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 City of Morganton is hereby authorized to:
1. Continue to operate a 10.5 MGD capacity wastewater treatment facility with an approved authorization
to discharge 8.0 MGD with the following components:
• Influent pumps
• Mechanical bar screen
• Wet well
• Grit removal structure(cyclone degritter)
• Two primary clarifiers
• Three equalization basins
• Three aeration basins
• Four secondary clarifiers
• Chlorine contact basin and dechlorination structure
• Sludge holding tank
• Dewatering centrifuge structure
• Aerobic digestors
• Composting site
• Back-up power(diesel generator)
2. Discharge treated wastewater from the Facility into the Catawba River,classified as WS-IV and critical area
(CA),in the Catawba River Basin,through outfall 001.The outfall location is specified on the attached map.
3. Discharge 10.5 MGD upon reaching a calendar year annual average daily flow equal to or greater than 6.4
MGD(80%of 8.0 MGD).The Permittee must submit an engineering certification confirming the 10.5 MGD
treatment capacity of the plant and confirming compliance with the 10.5 MGD once the effluent limits page
is in effect.
4. Operate the Facility to treat up to 13.0 MGD after receiving an Authorization to Construct from the Division
and submitting an engineering certification confirming compliance with the 13.0 MGD once the effluent
limits page is in effect.
Page 2 of 15

Permit NC0026573
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS(8.0 MGD)—
OUTFALL 001 [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] Grade IV Biological Water Pollution
Control System [15A NCAC 08G .0302]
a) Beginning on the effective date of this permit and lasting until this Facility reaches an annual average
daily flow equal to or greater than 6.4 MGD (80% of 8.0 MGD)or expiration date, the Permittee is
authorized to discharge from outfall 001,treated municipal and industrial wastewater. Such
discharges shall be limited and monitored' by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
PARAMETER
Code Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location'
Flow 50050 8.0 MGD Continuous Recording I or E
BODS(20°C)3 C0310 30.0 mg/L 45.0 mg/L Daily Composite I and E
Total Suspended Solids3 C0530 30.0 mg/L 45.0 mg/L Daily Composite I and E
Ammonia(NH3 as N) C0610 8.4 mg/L 25.3 mg/L Daily Composite E
Fecal Coliform
(Geometric Mean) 31616 200/100 mL 400/100 mL Daily Grab E
pH 00400 Between 6.0 and 9.0 standard units Daily Grab E
Dissolved Oxygen 00300 Daily Average>5 mg/L Daily Grab E
Dissolved Organic 00681 Monitor and Report,µg/L Quarterly Grab E
Carbon
Total Residual Chlorine 50060 28.0 L Grab E
(TRC)4 µ� Daily
Temperature 00010 Monitor and Report,°C Daily Grab E
Conductivity 00094 Monitor and Report,µmho/cm Daily Grab E
Total Hardness[as 00900 Monitor and Report,mg/L Quarterly Composite E
CaCO3]
Total Phosphorus(TP) C0665 Monitor and Report,mg/L Monthly Composite E
Total Nitrogen 6(TN) C0600 Monitor and Report,mg/L Monthly Composite E
Antimony 01097 Monitor and Report,µg/L Quarterly Composite E
Aluminum 01105 Monitor and Report,µg/L Quarterly Composite E
Total Copper" 01042 43.0 µg/L 48.1 µg/L Quarterly Composite E
Total Silver 01077 Monitor and Report,µg/L Quarterly Composite E
Total Hardness'[as 00900 Monitor and Report,mg/L Quarterly Grab U
CaCO3]
Conductivity 00094 Monitor and Report,µmho/cm Variable 7'8 Grab U and D
Dissolved Oxygen 00300 Monitor and Report,mg/L Variable 7'8 Grab U and D
Temperature 00010 Monitor and Report,°C Variable 7'8 Grab U and D
Effluent Pollutant Scan9 NC01 Monitor and Report Footnote 9 Footnote 9 E
Chronic Toxicity" TGP3B See Footnote 10 Quarterly Composite E
Footnotes:
1. The Permittee shall submit discharge monitoring reports electronically using NC DWR's eDMR application system. See
Special Condition A.(7).
2. Sample Location: E—Effluent,I—Influent,U—Upstream about 250 feet of the outfall,D—Downstream at Huffman Bridge
Road about 2.3 miles of the outfall.
3. The monthly average effluent BOD5 and total suspended solids concentrations shall not exceed 15%of the respective influent
value(85%removal).
Page 3 of 15

Permit NC0026573
4. The Division shall consider all effluent total residual chlorine values reported below 50 ug/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 ug/1.
5. Effluent Total Hardness sampling shall be performed in conjunction with testing for hardness-dependent metals(cadmium,
copper,lead,nickel,silver,and zinc). The Permittee shall sample instream hardness upstream of the Facility's discharge.
The sample shall be representative of the hardness in the receiving stream.
6. For a given wastewater sample,total nitrogen(TN)=TKN+NO3-N+NO2-N,where TKN is total Kjeldahl nitrogen,and
NO3-N and NO2-N are nitrate and nitrite nitrogen,respectively.
7. Variable monitoring frequency is defined as follows:samples collected three times per week during June 1 through
September 30 and once per week October 1 through May 31.
8. If the Permittee is a member of a monitoring coalition program,sampling may be waived as long as the monitoring coalition
agrees to sample at a minimum frequency of quarterly,and the Permittee has obtained approval from DWR-NPDES
Permitting Unit that the location being monitored by the Coalition and the sampling is representative of the receiving stream
for this discharge.The Permittee is responsible for submitting test results with its permit renewal application package.If
Coalition membership is canceled or the Coalition terminates sampling at the approved station,the Permittee will
immediately notify the Division and resume sampling for upstream of its discharge.
9. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit.See Special Condition A.(6).
10. Chronic Toxicity(Ceriodaphnia)P/F @ 9.5%,January,April,July,October.See Special Condition A.(4).
11. See Special condition A.(9)Schedule of compliance for copper.
There shall be no discharge of floating solids or visible foam other than trace amounts.
Page 4 of 15

Permit NC0026573
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (10.5 MGD) [15A
NCAC 02B .0400 et seq., 02B .0500 et seq.] Grade IV Biological Water Pollution Control System [15A NCAC
08G .0302]
a) Upon reaching a calendar year annual average daily flow equal to or greater than 6.4 MGD (80% of 8.0
MGD) once the effluent limit page is in effect(See item 3 of the Supplement to Permit Cover Sheet)—
and lasting until expiration or expansion to 13.0 MGD, the Permittee is authorized to discharge from
outfall 001, treated municipal and industrial wastewater. Such discharges shall be limited and
monitored' by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
PARAMETER
Code Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location2
Flow 50050 10.5 MGD Continuous Recording I or E
Total Monthly Flow 82220 Monitor and Report,MG Continuous Calculated I or E
BOD,(20°C)3 C0310 18.5 mg/L 45.0 mg/L Daily Composite I and E
Total Suspended Solids3 C0530 30.0 mg/L 45.0 mg/L Daily Composite I and E
Ammonia(NH3 as N) C0610 6.6 mg/L 19.8 mg/L Daily Composite E
(Apr.1—Oct.31)
Ammonia(NH3 as N)
C0610 13.3 mg/L 35.0 mg/L Daily Composite E
(Nov.1—Mar.31)
Fecal Coliform
(Geometric Mean) 31616 200/100 mL 400/100 ml Daily Grab E
pH 00400 Between 6.0 and 9.0 standard units Daily Grab E
Dissolved Oxygen 00300 Daily Average>5 mg/L Daily Grab E
Dissolved Organic 00681 Monitor and Report,µg/L Quarterly Grab E
Carbon
Total Residual Chlorine 50060 28.0 L Grab E
(TRC)4 µ� Daily
Temperature 00010 Monitor and Report,°C Daily Grab E
Conductivity 00094 Monitor and Report,µmho/cm Daily Grab E
Total Hardness[as 00900 Monitor and Report,mg/L Quarterly Composite E
CaCO3]
TKN 00625 Monitor and Report,mg/L Weekly Composite E
NO2—N+NO3—N 00630 Monitor and Report,mg/L Weekly Composite E
Total Nitrogen 6(TN) C0600 Monitor and Report,mg/L Monthly Composite E
Total Phosphorus(TP) C0665 Monitor and Report,mg/L Monthly Composite E
TN Load" QY600 146,659 lb/year Annual Calculated E
TP Load" QY665 33,200 lb/year Annual Calculated E
Aluminum 01105 Monitor and Report,µg/L Quarterly Composite E
Antimony 01097 Monitor and Report,µg/L Quarterly Composite E
Total Copper 01042 34.0,µg/L 38.4,µg/L Quarterly Composite E
Total Silver 01077 Monitor and Report,µg/L Quarterly Composite E
Total Zinc 01092 Monitor and Report,µg/L Quarterly Composite E
Total Hardness'[as 00900 Monitor and Report,mg/L Quarterly Grab U
CaCO3]
Conductivity 00094 Monitor and Report,µmho/cm Variable 7'8 Grab U and D
Dissolved Oxygen 00300 Monitor and Report,mg/L Variable 7'8 Grab U and D
Temperature 00010 Monitor and Report,°C Variable 7'8 Grab U and D
Effluent Pollutant Scan9 NC01 Monitor and Report Footnote 9 Footnote 9 E
Chronic Toxicity" TGP38 See Footnote 10 Quarterly Composite E
Page 5of15

Permit NC0026573
Footnotes:
1. The Permittee shall submit discharge monitoring reports electronically using NC DWR's eDMR application system. See
Special Condition A.(7).
2. Sample Location:E—Effluent,I—Influent,U—Upstream about 250 feet West of the outfall,D—Downstream at Huffman
Bridge Road about 2.3 miles NE of the outfall.
3. The monthly average effluent BOD5 and total suspended solids concentrations shall not exceed 15%of the respective influent
value(85%removal).
4. The Division shall consider all effluent total residual chlorine values reported below 50 ug/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 ug/1.
5. Effluent Total Hardness sampling shall be performed in conjunction with testing for hardness-dependent metals(cadmium,
copper,lead,nickel,silver,and zinc). The Permittee shall sample instream hardness upstream of the Facility's discharge.
The sample shall be representative of the hardness in the receiving stream.
6. For a given wastewater sample,total nitrogen(TN)=TKN+NO3-N+NO2-N,where TKN is total Kjeldahl nitrogen,and
NO3-N and NO2-N are nitrate and nitrite nitrogen,respectively.
7. Variable monitoring frequency is defined as follows:samples collected three times per week during June 1 through
September 30 and once per week October 1 through May 31.
8. If the Permittee is a member of a monitoring coalition program,sampling may be waived as long as the monitoring coalition
agrees to sample at a minimum frequency of quarterly,and the Permittee has obtained approval from DWR-NPDES
Permitting Unit that the location being monitored by the Coalition and the sampling is representative of the receiving stream
for this discharge.The Permittee is responsible for submitting test results with its permit renewal application package.If
Coalition membership is canceled or the Coalition terminates sampling at the approved station,the Permittee will
immediately notify the Division and resume sampling for upstream of its discharge.
9. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit. See Special Condition A.(6).
10. Chronic Toxicity(Ceriodaphnia)P/F @ 12.0%,January,April,July,October.See Special Condition A.(4).
11. TN(or TP)Load is the mass quantity of Total Nitrogen(or Total Phosphorus)discharged in a given period of time.See
Special Condition A.(5.),Calculation of Nutrient Loads.Total Nitrogen(TN)load limits and Total Phosphorus(TP)load
limits are annual limits and apply on a calendar year basis.
There shall be no discharge of floating solids or visible foam other than trace amounts.
Page 6 of 15

Permit NC0026573
A. (3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS(13.0 MGD) [15A
NCAC 02B .0400 et seq., 02B .0500 et seq.] Grade IV Biological Water Pollution Control System [15A NCAC
08G .0302]
a) After submitting an Engineering Certificate for expansion to 13.0 MGD and lasting until expiration of the
permit, the Permittee is authorized to discharge from outfall 001, treated municipal and industrial
wastewater. Such discharges shall be limited and monitored' by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
PARAMETER
Code Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location'
Flow 50050 13.0 MGD Continuous Recording I or E
Total Monthly Flow 82220 Monitor and Report,MG Continuous Calculated I or E
BOD,(20°C)3 C0310 15.0 mg/L 22.5 mg/L Daily Composite I and E
Total Suspended Solids3 C0530 30.0 mg/L 45.0 mg/L Daily Composite I and E
Ammonia(NH3 as N) C0610 5.6 mg/L 16.8 mg/L Daily Composite E
(Apr.1—Oct.31)
Ammonia(NH3 as N)
(Nov.1—Mar.31) C0610 11.0 mg/L 33.0 mg/L Daily Composite E
Fecal Coliform 31616 200/100 mL 400/100 mL Daily Grab E
(Geometric Mean)
pH 00400 Between 6.0 and 9.0 standard units Daily Grab E
Dissolved Oxygen 00300 Daily Average>5 mg/L Daily Grab E
Dissolved Organic 00681 Monitor and Report,µg/L Quarterly Grab E
Carbon
Total
(TRC)Residual Chlorine 50060 28 µg/L Daily Grab E
4
Temperature 00010 Monitor and Report,°C Daily Grab E
Conductivity 00094 Monitor and Report,µmho/cm Daily Grab E
TKN 00625 Monitor and Report,mg/L Weekly Composite E
NO2—N+NO3—N 00630 Monitor and Report,mg/L Weekly Co
mposite g/ ee y Co posite E
Total Hardness [as 00900 Monitor and Report,mg/L Quarterly Composite E
CaCO3]
Total Nitrogen 6(TN) C0600 Monitor and Report,mg/L Weekly Composite E
Total Phosphorus(TP) C0665 Monitor and Report,mg/L Weekly Composite E
TN Load" QY600 146,659 lb/year Annual Calculated E
TP Load" QY665 33,200 lb/year Annual Calculated E
Aluminum 01105 Monitor and Report,µg/L Quarterly Composite E
Antimony 01097 Monitor and Report,µg/L Quarterly Composite E
Total Copper 01042 28.5,µg/L 32.4,µg/L Quarterly Composite E
Total Silver 01077 Monitor and Report,µg/L Quarterly Composite E
Selenium 01147 Monitor and Report,µg/L Quarterly Composite E
Total Zinc 01092 Monitor and Report,µg/L Quarterly Composite E
Total Hardness [as 00900 Monitor and Report,mg/L Quarterly Grab U
CaCO3]
Conductivity 00094 Monitor and Report,µmho/cm Variable 7'8 Grab U and D
Dissolved Oxygen 00300 Monitor and Report,mg/L Variable 7,8 Grab U and D
Temperature 00010 Monitor and Report,°C Variable 7,8 Grab U and D
Effluent Pollutant Scan9 NC01 Monitor and Report Footnote 9 Footnote 9 E
Chronic Toxicity10 TGP3B See Footnote 10 Quarterly Composite E
Page 7 of 15

Permit NC0026573
Footnotes:
1. The Permittee shall submit discharge monitoring reports electronically using NC DWR's eDMR application system. See
Special Condition A.(7).
2. Sample Location:E—Effluent,I—Influent,U—Upstream about 250 feet West of the outfall,D—Downstream at Huffman
Bridge Road about 2.3 miles NE of the outfall.
3. The monthly average effluent BOD5 and total suspended solids concentrations shall not exceed 15%of the respective influent
value(85%removal).
4. The Division shall consider all effluent total residual chlorine values reported below 50 ug/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 ug/l.
5. Effluent Total Hardness sampling shall be performed in conjunction with testing for hardness-dependent metals(cadmium,
copper,lead,nickel,silver,and zinc). The Permittee shall sample instream hardness upstream of the Facility's discharge.
The sample shall be representative of the hardness in the receiving stream.
6. For a given wastewater sample,total nitrogen(TN)=TKN+NO3-N+NO2-N,where TKN is total Kjeldahl nitrogen,and
NO3-N and NO2-N are nitrate and nitrite nitrogen,respectively.
7. Variable monitoring frequency is defined as follows:samples collected three times per week during June 1 through
September 30 and once per week October 1 through May 31.
8. If the Permittee is a member of a monitoring coalition program,sampling may be waived as long as the monitoring coalition
agrees to sample at a minimum frequency of quarterly,and the Permittee has obtained approval from DWR-NPDES
Permitting Unit that the location being monitored by the Coalition and the sampling is representative of the receiving stream
for this discharge.The Permittee is responsible for submitting test results with its permit renewal application package.If
Coalition membership is canceled or the Coalition terminates sampling at the approved station,the Permittee will
immediatelynotify the Division and resume samplingfor u stream of its discharge.
fY P
9. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit.See Special Condition A.(6).
10. Chronic Toxicity(Ceriodaphnia)P/F @ 14.5%,January,April,July,October.See Special Condition A.(4).
11. TN(or TP)Load is the mass quantity of Total Nitrogen(or Total Phosphorus)discharged in a given period of time.See
Special Condition A.(5.),Calculation of Nutrient Loads.Total Nitrogen(TN)load limits and Total Phosphorus(TP)load
limits are annual limits and apply on a calendar year basis.
There shall be no discharge of floating solids or visible foam other than trace amounts.
Page 8 of 15

Permit NC0026573
A. (4.) CHRONIC TOXICITY PERMIT LIMIT(QUARTERLY) [15A NCAC 02B.0200 et seq.]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 9.5%at 8.0 MGD; 12.0%at 10.5 MGD; and 14.50%at
13.0 MGD.
The permit holder shall perform at a minimum,quarterly monitoring using test procedures outlined in the
"North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure,"Revised December 2010, or subsequent
versions or"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"(Revised-December
2010)or subsequent versions. The tests will be performed during the months of January,April,July,October.
Effluent sampling for this testing shall be performed at the NPDES permitted final effluent discharge below all
treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the
permit limit,then multiple-concentration testing shall be performed at a minimum,in each of the two
following months as described in"North Carolina Phase II Chronic Whole Effluent Toxicity Test
Procedure"(Revised-December 2010 or subsequent versions).
All toxicity testing results required as part of this permit condition will be entered electronically using the
Division's eDMR system for the months in which tests were performed,using the parameter code 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,North Carolina 27699-1621
Or,results can be sent to the email,ATForms.ATBc ncdenr.gov.
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30 days
after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data,and be certified by laboratory supervisor and ORC or approved designate signature.
Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should there be no discharge of flow from the Facility during a month in which toxicity monitoring is required,
the Permittee will complete the information located at the top of the aquatic toxicity(AT)test form indicating
the facility name,permit number,pipe number,county,and the month/year of the report with the notation of
"No Flow"in the comment area of the form. The report shall be submitted to the Water Sciences Section at the
address cited above.
Should the Permittee fail to monitor during a month in which toxicity monitoring is required,monitoring will be
required during the following month. Assessment of toxicity compliance is based on the toxicity testing quarter,
which is the three-month time interval that begins on the first day of the month in which toxicity testing is
required by this permit and continues until the fmal day of the third month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of
Water Resources indicate potential impacts to the receiving stream,this permit may be re-opened and modified
to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document,such as minimum control organism
survival,minimum control organism reproduction,and appropriate environmental controls,shall constitute an
invalid test and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring.
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Permit NC0026573
A. (5.) CALCULATION OF TOTAL NITROGEN AND TOTAL PHOSPHORUS LOADS [G.S. 143-
215.1(B)]
Total Nitrogen(TN)load limits and total phosphorous(TP) load limits are annual limits and apply on a calendar
year basis for the 7.5 MGD and 10.5 MGD flow tiers.
(a.) The Permittee shall calculate annual TN/TP loads as follows:
(i.) Monthly TN(or TP)Load(lb/mo)=TN(or TP)x TMF x 8.34
where:
TN or TP = the average Total Nitrogen or Total Phosphorus concentration(mg/L)of
the composite samples collected during the month
TMF = the Total Monthly Flow of wastewater discharged during the month
(MG/mo)
8.34 = conversion factor, from(mg/L x MG)to pounds
(ii.) Annual TN(or TP)Load(lb/yr)=Sum of the 12 Monthly TN(or TP)Loads for the calendar
year
(b.)The Permittee shall report monthly Total Nitrogen and Total Phosphorus results(mg/L and lb/mo)in the
appropriate discharge monitoring report for each month and shall report each calendar year's results(lb/yr)
with the December report for that year.
A. (6.)EFFLUENT POLLUTANT SCAN [G.S. 143-215.1(B)]
a) 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: 2023,2024,and 2025. 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) C0610 Trans-1,2-dichloroethylene 34546 Bis(2-chloroethyl)ether 34273
Chlorine(total residual,TRC) 50060 1,1-dichloroethylene 34501 Bis(2-chloroisopropyl)ether 34283
Dissolved oxygen 00300 1,2-dichloropropane C0541 Bis(2-ethylhexyl)phthalate CO100
Nitrate/Nitrite 00630 1,3-dichloropropylene 77163 4-bromophenyl phenyl ether 34636
Kjeldahl nitrogen 00625 Ethylbenzene 34371 Butyl benzyl phthalate 34292
Oil and grease 00556 Methyl bromide 34413 2-chloronaphthalene 34581
Phosphorus C0665 Methyl chloride 34418 4-chlorophenyl phenyl ether 34641
Total dissolved solids 70295 Methylene chloride 34423 Chrysene 34320
Hardness 00900 1,1,2,2-tetrachloroethane 81549 Di-n-butyl phthalate 39110
Antimony 01097 Tetrachloroethylene 34475 Di-n-octyl phthalate 34596
Arsenic 01002 Toluene 34010 Dibenzo(a,h)anthracene 34556
Beryllium 01012 1,1,1-trichloroethane 34506 1,2-dichlorobenzene 34536
Cadmium 01027 1,1,2-trichloroethane 34511 1,3-dichlorobenzene 34566
Chromium C0034 Trichloroethylene 39180 1,4-dichlorobenzene 34571
Copper 01042 Vinyl chloride 39175 3,3-dichlorobenzidine 34631
Lead 01051 Acid-extractable compounds: Diethyl phthalate 34336
Mercury(Method 1631E) COMER P-chloro-m-cresol 34452 Dimethyl phthalate 34341
Nickel 01067 2-chlorophenol 34586 2,4-dinitrotoluene 34611
Selenium 01147 2,4-dichlorophenol 34601 2,6-dinitrotoluene C0626
Silver 01077 2,4-dimethylphenol 34606 1,2-diphenylhydrazine 34346
Thallium 01059 4,6-dinitro-o-cresol 34657 Fluoranthene C0376
Zinc 01092 2,4-dinitrophenol 34616 Fluorene 34381
Cyanide 00720 2-nitrophenol 34591 Hexachlorobenzene C0700
Total phenolic compounds 32730 4-nitrophenol 34646 Hexachlorobutadiene C0702
Volatile organic compounds: Pentachlorophenol 39032 Hexachlorocyclo-pentadiene 34386
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Permit NC0026573
Acrolein 34210 Phenol 34694 Hexachloroethane 34396
Acrylonitrile 34215 2,4,6-trichlorophenol 34621 Indeno(1,2,3-cd)pyrene 34403
Benzene 34030 face-neutral compounds: Isophorone 34408
Bromoform 32104 Acenaphthene 34205 Naphthalene 34696
Carbon tetrachloride 32102 Acenaphthylene 34200 Nitrobenzene 34447
Chlorobenzene 34301 Anthracene CO220 N-nitrosodi-n-propylamine 34428
Chlorodibromomethane 34306 Benzidine 39120 N-nitrosodimethylamine 34438
Chloroethane 85811 Benzo(a)anthracene C0526 N-nitrosodiphenylamine 34433
2-chloroethyl vinyl ether 34576 Benzo(a)pyrene 34247 Phenanthrene 34461
Chloroform 32106 3,4 benzofluoranthene 34230 Pyrene 34469
Dichlorobromomethane 32101 Benzo(ghi)perylene 34521 1,2,4-trichlorobenzene C0551
1,1-dichloroethane 34496 Benzo(k)fluoranthene 34242
1,2-dichloroethane 32103 Bis(2-chloroethoxy)methane 34278
b) Reporting. Test results shall be reported electronically using the Division's eDMR system or on DWR
Form DMR-PPA-1(or on a form approved by the Director)by December 31 St of each designated sampling
year.
c) The Permittee must at least report completion of the test in the eDMR system by entering"1"or"Y"for
parameter code NC01 - Annual Pollutant Scan. If utilizing the DWR Form submit to the following
address:
NC DEQ/DWR/NPDES Files,1617 Mail Service Center,Raleigh,North Carolina 27699-1617.Or
the form may be uploaded at:https://edocs.deq.nc.gov/Forms/NPDES WW-EDMR-Supplemental-Form
d) Additional Toxicity Testing Requirements for Municipal Permit Renewal. Please note that
Municipal facilities that are subject to the Effluent Pollutant Scan requirements listed above are also
subject to additional toxicity testing requirements specified in Federal Regulation 40 CFR 122.21(j)(5).
The US EPA requires four (4) toxicity tests for a test organism other than the test species currently
required in this permit. The multiple species tests should be conducted either quarterly for a 12-month
period prior to submittal of the permit renewal application,or four tests performed at least annually in the
four-and one-half year period prior to the application. These tests shall be performed for acute or chronic
toxicity,whichever is specified in this permit. The multiple species toxicity test results shall be filed with
the Aquatic Toxicology Branch at the following address:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh,North Carolina 27699-1621
Or,results can be sent to the email,ATForms.ATB(a,ncdenr.gov.
Contact the Division's Aquatic Toxicology Branch at 919-743-8401 for guidance on conducting the
additional toxicity tests and reporting requirements. Results should also be summarized in Part E
(Toxicity Testing Data)of EPA Municipal Application Form 2A,when submitting the permit renewal
application to the NPDES Permitting Unit.
A. (7.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS
[G.S. 143-215.1(B)]
Federal regulations require electronic submittal of all discharge monitoring reports(DMRs)and program
reports.The final NPDES Electronic Reporting Rule was adopted and became effective on December 21,2015.
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Permit NC0026573
NOTE: This special condition supplements or supersedes the following sections within Part II of this permit
(Standard Conditions for NPDES Permits):
• Section B. (11.) Signatory Requirements
g ry q
• 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.)(all
The Permittee shall report discharge monitoring data electronically using the NC DWR's Electronic
Discharge Monitoring Report(eDMR)internet application.
Monitoring results obtained during the previous month(s)shall be summarized for each month and
submitted monthly electronically using eDMR. The eDMR system allows permitted facilities to
enter monitoring data and submit DMRs electronically using the internet. The eDMR system may
be accessed at: https://deq.nc.gov/about/divisions/water-resources/edmr.
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the
facility being physically located in an area where less than 10 percent of the households have
broadband access,then a temporary waiver from the NPDES electronic reporting requirements
may be granted and discharge monitoring data may be submitted on paper DMR forms(MR 1, 1.1,
2,3)or alternative forms approved by the Director. Duplicate signed copies shall be submitted to
the following address:NC DEQ/Division of Water Resources/Water Quality Permitting Section
NC DEQ/Division of Water Resources/Water Quality Permitting Section
A FI ENTION:Central Files
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
See"How to Request a Waiver from Electronic Reporting"section below.
Regardless of the submission method,the first DMR is due on the last day of the month following the issuance
of the permit or, in the case of a new facility,on the last day of the month following the commencement of
discharge.
NPDES Electronic Reporting Rule—Phase 2 Extension. EPA extended the Phase 2 deadline to December 21,
2025. The current compliance date,effective January 4,2021,was extended as a final regulation change
published in the November 2,2020 Federal Register.
Starting on December 21,2025,the Permittee must electronically report the following compliance monitoring
data and reports,when applicable:
• Sewer Overflow/Bypass Event Reports;
• Pretreatment Program Annual Reports;and
• Clean Water Act(CWA)Section 316(b)Annual Reports.
The Permittee may seek an electronic reporting waiver from the Division (see"How to Request a Waiver from
Electronic Reporting"section below).
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Permit NC0026573
2. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9),the Permittee must identify the initial recipient at the time of each
electronic submission. The Permittee should use the EPA's website resources to identify the initial recipient for
the electronic submission.
Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity(EPA or the
state authorized by EPA to implement the NPDES program)that is the designated entity for receiving electronic
NPDES data[see 40 CFR 127.2(b)].
EPA plans to establish a website that will also link to the appropriate electronic reporting tool for each type of
electronic submission and for each state. Instructions on how to access and use the appropriate electronic
reporting tool will be available as well. Information on EPA's NPDES Electronic Reporting Rule is found at
https://www.federalregister.gov/documents/2015/10/22/2015-24954/national-pollutant-discharge-elimination-
system-npdes-electronic-reporting-rule
Electronic submissions must start by the dates listed in the"Reporting Requirements"section above.
3. How to Request a Waiver from Electronic Reporting
The Permittee may seek a temporary electronic reporting waiver from the Division. To obtain an electronic
reporting waiver,a permittee must first submit an electronic reporting waiver request to the Division. Requests
for temporary electronic reporting waivers must be submitted in writing to the Division for written approval at
least sixty(60)days prior to the date the Facility would be required under this permit to begin submitting
monitoring data and reports. The duration of a temporary waiver shall not exceed 5 years and shall thereupon
expire. At such time,monitoring data and reports shall be submitted electronically to the Division unless the
permittee re-applies for and is granted a new temporary electronic reporting waiver by the Division. Approved
electronic reporting waivers are not transferrable. Only permittees with an approved reporting waiver request
may submit monitoring data and reports on paper to the Division for the period that the approved reporting
waiver request is effective.
Information on eDMR and the application for a temporary electronic reporting waiver are found on the
following web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)1
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II, Section B.
(11.)(a)or by a duly authorized representative of that person as described in Part II, Section B. (11.)(b). A
person,and not a position,must be delegated signatory authority for eDMR reporting purposes.
For eDMR submissions,the person signing and submitting the DMR must obtain an eDMR user account and
login credentials to access the eDMR system. For more information on North Carolina's eDMR system,
registering for eDMR,and obtaining an eDMR user account,please visit the following web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
Certification. Any person submitting an electronic DMR using the state's eDMR system shall make the
following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION WILL BE
ACCEPTED:
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Permit NC0026573
"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.(6.11
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].
Map will be added here once doc is in pdf.
A.(8.)MERCURY MINIMIZATION PLAN(MMP) [G.S. 143-215.1(B)]
The Permittee shall continue implementing the mercury minimization plan during this permit term.
The MMP should place emphasis on identification of mercury contributors and goals for reduction.
Results shall be summarized and submitted with the next permit renewal. Performance of the Mercury
Minimization Plan will meet the requirements of the TMDL(Total Maximum Daily Load)for mercury
approved by USEPA on October 12,2012,unless and until a Waste Load Allocation specific to this
facility is developed and this NPDES permit is amended to require further actions to address the Waste
Load Allocation.
A. (9.) SCHEDULE OF COMPLIANCE FOR COPPER [NCGS 143-215.1 (b)]
1. On date,within one(1)year of the permit effective date,the Permittee shall submit to the Division a
Corrective Action Plan(CAP)for Division approval(which could include a pretreatment local limits
assessment),summarizing the strategy or actions to be taken to achieve compliance with the copper
limitations listed in Section A. (1.). This plan will include specific dates for the completion or
implementation of each action.
2. On date,within two(2)years of the permit effective date,the Permittee shall submit to the Division a
summary of actions taken towards achieving compliance with the copper limitations specified in Section
A. (1.).
3. The Permittee shall achieve compliance with copper limitations specified in Section A. (1.)by date,
within three(3)years of the permit effective date.
Upon approval of the Corrective Action Plan(CAP)by the Division,the report,actions,and implementation
dates become an enforceable part of this permit. Any modifications to the schedule shall be requested to the
Division at least ninety(90)days before the deadline.Modifications to the schedule in excess of four months
will be subject to public notice.
Annual summaries and the CAP shall include the owner's name,NPDES permit number, and a Permittee contact
person and shall be submitted to:
NCDEQ/Division of Water Resources
NPDES Municipal Permitting Unit—NPDES and Pretreatment File
1617 Mail Service Center
Raleigh,NC 27699-1617
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PrmkKCO257
Male itin attachments>pffolder)
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