NC0030210_Draft Permit_20190904

c TATE4, I
ROY COOPER 4 li1�
Governor 't :_li `+
MICHAEL S.REGAN , .•n�.
Secretary 84p'"j 0
LINDA CULPEPPER NORTH CAROLINA
Director Environmental Quality
September 4, 2019
Ms. Jaqueline Jarrell,P.E.
Operations Chief
City of Charlotte
5100 Brookshire Blvd. 1
Charlotte,North Carolina 28216
Subject: Draft NPDES Permit Renewal
Permit NC0030210
Mallard Creek WRF
Mecklenburg County
Grade IV Biological WPCS
SIC Code 4952
Dear Ms. Jarrell:
Enclosed with this letter is a copy of the Draft NPDES permit renewal for your facility. Please
review this draft carefully to ensure thorough understanding of the requirements and conditions it
contains. There are several changes from the existing permit, including the following:
• As expansion of the Mallard Creek WRF has been approved by the Division,expansion
pages have been added to the permit for 13.1 MGD, 14.9 MGD and 16.0 MGD flow tiers
[See A.(1.),A.(2.),A.(3.)and A.(4.)].
• Based on the reasonable potential analysis (RPA) showing no reasonable potential to
violate state water quality standards, the monitoring requirement for zinc has been removed
from the permit[See A.(1.),A.(2.),A.(3.)and A.(4.)].
• The NC 2007-2014 Water Quality Standard(WQS)Triennial Review was approved by
the NC Environmental Management Committee(EMC)on November 13,2014.The US EPA
subsequently approved the WQS revisions on April 6,2016 with some exceptions. The NC
Division of Water Resources NPDES Permitting Unit is required to implement the new
dissolved metal standards in all permits public noticed after April 6,2016. The new standards
for most metals include acute standards. Further,the freshwater standards for several metals
are expressed as the dissolved form of the metals,and seven metals have hardness-dependent
equations. As a result,the NPDES PermittingUnit will need site-specific effluent hardness
q P
data and instream hardness data,upstream of the discharge, for each facility monitoring these
metals in order 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 A.(1.),A.(2.),A.(3.)and A.(4.)].
• Some of the wording has changed in Special Condition A. (5.), Chronic Toxicity Permit
Limit,please review each paragraph carefully.
• Special Condition A. (6.) has been modified to include the specific three years in which
the Effluent Pollutant Scan shall be performed(2020, 2021,and 2022). In addition, at the end
512 NorthNorth Carolina
Salisbury DepartmentStreet1 of Environmental1617MailServiceCenter I Quality Raleigh.Division of WaterNorth Resources
_E
27699-1617
919.7079000

of the Special Condition, 2'd species Toxicity Testing Requirements for municipal permit
renewals per Federal Regulations [40 CFR 122.21(j)(5)]have been added.
• Parameter codes have been added to the Effluent Limitations and Monitoring Requirements
[ See A.(1.),A.(2.),A.(3.)and A.(4.)].
• Regulatory citations have been added to the permit.
The NPDES standard conditions(Parts II,III,and IV)that are a part of the permit are not included
in this draft document (cover, map, and Part I). The conditions are the same as in your current
permit except that agency and division names have been updated. The latest version is available
at https://bit.ly/2BZ4xxx and can be viewed online or downloaded as a PDF file.
Concurrent with this notification the Division is publishing a notice in a newspaper having
circulation in the general Mecklenburg 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(919)707-3609 or by email at [e-mail].
Sincerely,
Digitally signed by Nick Coco
D 4'00' 19.08.22 16:59:06
-04'00'
Nick Coco,Engineer
NPDES Complex Permitting Unit
Hardcopy: NPDES Files
Ecopy: US EPA Region 4
DWR/Mooresville Regional Office/Water Quality/Cory Basinger
DWR/Operator Certification Program/Maureen Kinney
DWR/Aquatic Toxicology Branch/Susan Meadows
Mecklenburg County/Richard Farmer
Brown and Caldwell/Consultant Engineer/George Anipsitakis
NCWRC/Olivia Munzer
USFWS/Sarah McRae
Page 2 of 2

Permit NC0030210
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
P
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission,and the Federal Water Pollution Control Act,as amended,
City of Charlotte
Charlotte Mecklenburg Utility Department
is hereby authorized to discharge wastewater from a facility located at
Mallard Creek Water Reclamation Facility
12400 US Highway 29 North
Mecklenburg County
to receiving waters designated as Mallard Creek in the Yadkin-Pee Dee River Basin in accordance
with the discharge limitations,monitoring requirements,and other conditions set forth in Parts I,II,
III, and IV hereof.
This permit shall become effective Month xx, 2019.
This permit and the authorization to discharge shall expire at midnight on November 30,2023.
Signed this day Month xx, 2019.
DRAFT
Linda Culpepper,Director
Division of Water Resources
By Authority of the Environmental Management Commission

Permit NC0030210
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.
Charlotte Mecklenburg Utility Department
Mallard Creek Water Reclamation Facility
is hereby authorized to:
1. Continue to operate an existing 12.0 MGD wastewater treatment facility located at 12400 US
Highway 29,Charlotte,Mecklenburg County,consisting of:
• influent pump station
• mechanical bar screens
• two vortex grit removal basins
• two flow equalization day tanks
• intermediate pumping station
• five primary clarifiers
• three biological treatment trains
• anoxic zones and aeration with internal recycle
• three final clarifiers
• two traveling bridge tertiary filters
• UV disinfection and re-aeration
• reuse distribution
• anaerobic digesters
• a sludge holding tank
• a waste thickening centrifuge
• sludge drying beds and
• three standby power generators
2. After receiving an Authorization to Construct(ATC)froth the Division,completing construction,
and submitting an Engineer's Certification for completion of expansion to 13.1 MGD,operate a 13.1
MGD wastewater treatment facility.
3. After receiving an Authorization to Construct(ATC)from the Division,completing construction,
and submitting an Engineer's Certification for completion of expansion to 14.9 MGD,operate a 14.9
MGD wastewater treatment facility.
4. After receiving an Authorization to Construct(ATC)from the Division,completing construction,
and submitting an Engineer's Certification for completion of expansion to 16.0 MGD,operate a 16.0
MGD wastewater treatment facility.
5. Operate facilities for reclaimed water use of up to 4.0 MGD in accordance with Non-Discharge
Permit number WQ0013252.
6. Reuse non-potable treated effluent for irrigation and dust control on the property of the Mallard
Creek Water Reclamation Facility in accordance with condition A.(7.)of the permit.
7. Discharge treated wastewater from the facility described in item one above at the location specified
on the attached map through outfall 001 into Mallard Creek,a class C water in the Yadkin-Pee Dee
River Basin.
Page 2 of 14

Permit NC0030210
Part I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (12.0 MGD)
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.] Grade IV Biological Water
Pollution Control System [15A NCAC 08G .0302]
Beginning upon the effective date of this permit and lasting until expansion above 12.0 MGD or permit
expiration,whichever comes first,the Permittee is authorized to discharge treated wastewater from Outfall
001. Such discharges shall be limited and monitored`by the Permittee as specified below:
PARAMETER EFFLUENT LIMITS MONITORING REQUIREMENTS
Parameter Code
Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location2
Flow(MGD) 50050 12.0 Continuous Recording Influent or
Effluent
CBOD5(20°C)3 80082 4.2 mg/L 6.3 mg/L 2/Week4 Composite Influent&
(April 1-October 31) Effluent
CBOD5(20°C)3 4Influent&
•
(November 1 -March 31) 80082 8.3 mg/L 12.5 mg/L 2/Week Composite Effluent
Total Suspended Solids CO530 30.0 mg/L 45.0 mg/L 2/Week4 Composite Influent&
(TSS)3 Effluent
Ammonia(NH3 as N) CO610 1.0 mg/L 3.0 mg/L 2/Week4 Composite Effluent
(April 1 -October 31)
Ammonia(NH3 as N) C0610 2.0 mg/L 6.0 mg/L 2/Week4 Composite Effluent
(November 1-March 31)
Dissolved Oxygen 00300 Daily Average> 6.0 mg/L Daily Grab Effluent
Fecal Coliform 61211 200/100 mL 400/100 mL
(geometric mean)
/ 2/Week4 Grab Effluent
Total Nitrogen5,mg/L C0600 Monitor&Report Monthly Composite Effluent
Total Phosphorous,mg/L C0665 Monitor&Report Monthly Composite Effluent
Temperature(°C) 00010 Monitor&Report Daily Grab Effluent
pH 00400 Between 6.0 and 9.0 standard units Daily Grab Effluent
Total Hardness[as 00900 Quarterly Composite Effluent
CaCO3]6,mg/L
Chronic Toxicity' THP3B See Note 7. Quarterly Composite Effluent
Effluent Pollutant Scan NC01 Monitor&Report See Special Condition A. (6.)
Total Hardness[as 00900 Quarterly Grab Upstream
CaCO3] ,mg/L
Dissolved Oxygen,mg/L 00300 See Note 2. Grab Upstream&
Downstream
Temperature(°C) 00010 See Note 2. Grab Upstream&
Downstream
Notes:
1. The Permittee shall submit discharge monitoring reports electronically using NC DWR's eDMR application system. See
Special Condition A.(9.).
2. Sample locations:Upstream at Pavillion Boulevard and downstream at NCSR 1300 and at NCSR 1304(Rocky River). Stream
samples shall be grab samples and shall be collected 3/Week during the months of June,July,August,and September and
1/Week during the remaining months of the year.Should the permittee elect to participate in the Yadkin-Pee Dee River
Basin Association,instream sampling shall be provisionally waived.
3. The monthly average CBOD5 and Total Suspended Solids concentrations shall not exceed 15%of the respective influent value
(85%removal).
4. 2/Week sampling must occur on any two non-consecutive days during the calendar week.
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.
Page 3 of 14

Permit NC0030210
Notes(Continued):
6. Effluent hardness sampling shall be performed in conjunction with testing for hardness dependent metals(Copper,Zinc,
Chromium,Cadmium,Nickel,Silver and Lead).
7. Chronic Toxicity(Ceriodaphnia dubia)P/F at 90%:March,June,September and December;See Special Condition A.(5.)of
this permit.
8. The Permittee shall sample instream hardness,upstream of the facility's discharge.The sample shall be representative of the
hardness in the receiving stream.If the Permittee is a member of the Monitoring Coalition Program,sampling for instream
hardness may be waived as long as the Monitoring Coalition agrees to sample hardness at the nearest upstream location,at a
minimum frequency of quarterly,and the Permittee has obtained approval from DWR-NPDES Permitting Unit that the
upstream station being monitored by the Coalition is representative of the receiving stream for this discharge.The Permittee is
responsible for submitting instream hardness test results with its permit renewal application package.If Coalition membership is
cancelled or the 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.
The Permittee shall discharge no floating solids or foam visible in other than trace amounts.
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (13.1 MGD)
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.] Grade IV Biological Water
Pollution Control System [15A NCAC 08G .0302]
Beginning upon receipt of the Engineer's Certification for completion of the expansion to 13.1 MGD and
lasting until expansion above 13.1 MGD or permit expiration, whichever comes first, the Permittee is
authorized to discharge treated wastewater from Outfall 001. Such discharges shall be limited and
monitored`by the Permittee as specified below:
PARAMETER EFFLUENT LIMITS MONITORING REQUIREMENTS
Parameter Code
Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location2
Flow(MGD) 50050 13.1 Continuous Recording Influent or
Effluent
CBOD (20°C)3 80082 4.2 mg/L 6.3 mg/L 2/Week4 Composite
(April
Influent&
(April 1 -October 31) Effluent
CBODS(20°C)3 80082 8.3 mg/L 12.5 mg/L 2/Week4 Composite Influent&
(November 1 -March 31) Effluent
Total Suspended Solids C0530 30.0 mg/Lmg/L Week4 Composite
Influent&
45.0 2
9 /(TSS)3 Effluent
Ammonia(NH3 as N) C0610 1. mg/L 3.0 mg/L 2/Week4 1-October 31) 0 9/ Composite Effluent
Ammonia(NH3 as N) C0610 2.0 mg/L6.0 m L 2/Week4 1-March 31) 9/ Composite Effluent
Dissolved Oxygen 00300 Daily Average> 6.0 mg/L Daily Grab Effluent
Fecal Coliform 61211 200/100 mL 400/100 mL 2/Week4 Grab Effluent
(geometric mean)
Total Nitrogen5,mg/L C0600 Monitor&Report Monthly Composite Effluent
Total Phosphorous, mg/L C0665 Monitor&Report Monthly Composite Effluent
Temperature(°C) 00010 Monitor&Report Daily Grab Effluent
pH 00400 Between 6.0 and 9.0 standard units Daily Grab Effluent
Total Hardness[as 00900 Quarterly Composite Effluent
CaCO3]6,mg/L
Chronic Toxicity' THP3B See Note 7. Quarterly Composite Effluent
Effluent Pollutant Scan NC01 Monitor&Report See Condition A. (6.)
Total Hardness[as 00900 Quarterly Grab Upstream
CaC0315,mg/L
Page 4 of 14

Permit NC0030210
PARAMETER EFFLUENT LIMITS MONITORING REQUIREMENTS
Parameter Code
Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location2
Dissolved Oxygen,mg/L 00300 See Note 2. Grab Upstream&
Downstream
Temperature(°C) 00010 See Note 2. Grab Upstream&
Downstream
Notes:
1. The Permittee shall submit discharge monitoring reports electronically using NC DWR's eDMR application system. See
Special Condition A.(9.).
2. Sample locations:Upstream at Pavillion Boulevard and downstream at NCSR 1300 and at NCSR 1304(Rocky River). Stream
samples shall be grab samples and shall be collected 3/Week during the months of June,July,August,and September and
1/Week during the remaining months of the year.Should the permittee elect to participate in the Yadkin-Pee Dee River
Basin Association,instream sampling shall be provisionally waived.
3. The monthly average CBOD5 and Total Suspended Solids concentrations shall not exceed 15%of the respective influent value
(85%removal).
4. 2/Week sampling must occur on any two non-consecutive days during the calendar week.
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. Effluent hardness sampling shall be performed in conjunction with testing for hardness dependent metals(Copper,Zinc,
Chromium,Cadmium,Nickel,Silver and Lead).
7. Chronic Toxicity(Ceriodaphnia dubia)P/F at 90%:March,June,September and December;See Special Condition A.(5.)of
this permit.
8. The Permittee shall sample instream hardness,upstream of the facility's discharge.The sample shall be representative of the
hardness in the receiving stream.If the Permittee is a member of the Monitoring Coalition Program,sampling for instream
hardness may be waived as long as the Monitoring Coalition agrees to sample hardness at the nearest upstream location,at a
minimum frequency of quarterly,and the Permittee has obtained approval from DWR-NPDES Permitting Unit that the
upstream station being monitored by the Coalition is representative of the receiving stream for this discharge.The Permittee is
responsible for submitting instream hardness test results with its permit renewal application package.If Coalition membership is
cancelled or the 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.
The Permittee shall discharge no floating solids or foam visible in other than trace amounts.
A. (3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (14.9 MGD)
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.] Grade IV Biological Water
Pollution Control System [15A NCAC 08G .0302]
Beginning upon receipt of the Engineer's Certification for completion of the expansion to 14.9 MGD and
lasting until expansion above 14.9 MGD or permit expiration, whichever comes first, the Permittee is
authorized to discharge treated wastewater from Outfall 001. Such discharges shall be limited and
monitored' by the Permittee as specified below:
PARAMETER EFFLUENT LIMITS MONITORING REQUIREMENTS
Parameter Code
Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location2
Flow(MGD) 50050 14.9 Continuous Recording Influent or
Effluent
CBOD5(20°C)3 4.2mg/L 6.3 mg/L 2/Week4 • Influent&
80082
(April 1 -October 31) gl Composite Effluent
CBOD5(20°C)' 80082 8.3 mg/L 12.5 mg/L 2/Week4 Composite ▪ Influent&
(November 1 -March 31) Effluent
Total Suspended Solids C0530 30.0 mg/L 45.0 mg/L 2/Week4 Influent&
(T.SS)3 g glComposite Effluent
Ammonia(NH3 as N) C0610 1.0 mg/L 3.0 mg/L 2/Week4 Composite Effluent
(April 1 -October 31)
Page 5 of 14

Permit NC0030210
PARAMETER EFFLUENT LIMITS MONITORING REQUIREMENTS
Parameter Code
Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location2
Ammonia(NH3 as N) C0610 2.0 mg/L 6.0 mg/L 2/Week4 Composite Effluent
(November 1-March 31)
Dissolved Oxygen 00300 Daily Average> 6.0 mg/L Daily Grab Effluent
Fecal Coliform 61211 200/100 mL 400/100 mL 2/Week4 Grab Effluent
(geometric mean)
Total Nitrogens,mg/L C0600 Monitor&Report Monthly Composite Effluent
Total Phosphorous,mg/L C0665 Monitor&Report Monthly Composite Effluent
Temperature(°C) 00010 Monitor&Report Daily Grab Effluent
pH 00400 Between 6.0 and 9.0 standard units Daily Grab Effluent
Total Hardness[as 00900
CaCO3]6,mg/L Quarterly Composite Effluent
Chronic Toxicity' THP3B See Note 7. Quarterly Composite Effluent
Effluent Pollutant Scan NC01 Monitor&Report See Condition A. (6.)
Total Hardness[as 00900 Quarterly Grab Upstream
CaC0318,mg/L
Dissolved Oxygen,mg/L 00300 See Note 2. Grab Upstream&
Downstream
Temperature(°C) 00010 See Note 2. Grab Upstream&
Downstream
Notes:
I. The Permittee shall submit discharge monitoring reports electronically using NC DWR's eDMR application system. See
Special Condition A.(9.).
2. Sample locations:Upstream at Pavilion Boulevard and downstream at NCSR 1300 and at NCSR 1304(Rocky River). Stream
samples shall be grab samples and shall be collected 3/Week during the months of June,July,August,and September and
1/Week during the remaining months of the year.Should the permittee elect to participate in the Yadkin-Pee Dee River
Basin Association,instream sampling shall be provisionally waived.
3. The monthly average CBOD5 and Total Suspended Solids concentrations shall not exceed 15%of the respective influent value
(85%removal).
4. 2/Week sampling must occur on any two non-consecutive days during the calendar week.
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. Effluent hardness sampling shall be performed in conjunction with testing for hardness dependent metals(Copper,Zinc,
Chromium,Cadmium,Nickel,Silver and Lead).
7. Chronic Toxicity(Ceriodaphnia dubia)P/F at 90%:March,June,September and December;See Special Condition A.(5.)of
this permit.
8. The Permittee shall sample instream hardness,upstream of the facility's discharge.The sample shall be representative of the
hardness in the receiving stream.If the Permittee is a member of the Monitoring Coalition Program,sampling for instream
hardness may be waived as long as the Monitoring Coalition agrees to sample hardness at the nearest upstream location,at a
minimum frequency of quarterly,and the Permittee has obtained approval from DWR-NPDES Permitting Unit that the
upstream station being monitored by the Coalition is representative of the receiving stream for this discharge.The Permittee is
responsible for submitting instream hardness test results with its permit renewal application package.If Coalition membership is
cancelled or the 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.
The Permittee shall discharge no floating solids or foam visible in other than trace amounts.
Page 6 of 14

Permit NC00302 10
A. (4.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (16.0 MGD)
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.] Grade IV Biological Water
Pollution Control System [15A NCAC 08G .0302]
Beginning upon receipt of the Engineer's Certification for completion of the expansion to 16.0 MGD and
lasting until expiration,the Permittee is authorized to discharge treated wastewater from Outfall 001. Such
discharges shall be limited and monitored' by the Permittee as specified below:
PARAMETER EFFLUENT LIMITS MONITORING REQUIREMENTS
Parameter Code
Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location2
Flow(MGD) 50050 16.0 Continuous Recording Influent Effluent or
CBODS(20°C)3 Influent&
(April 1 October 31) 80082 4.2 mg/L 6.3 mg/L 2/Week4Composite Effluent
CBODs(20°C)3 • Influent&
80082 8.3 mg/L 12.5 mg/L 2/Week4 Composite
(November 1-March 31) Effluent
Total Suspended Solids C0530 30.0 mg/L 45.0 mg/L 2/Week4 Composite • Influent&
(TSS)3 Effluent
Ammonia(NH3 as N) C0610 1.0 mg/L 3.0 mg/L 2/Week4 Composite Effluent
(April 1 -October 31)
Ammonia(NH3 as N) C0610 2.0 mg/L 6.0 mg/L 2/Week4 Composite Effluent
(November 1 -March 31)
Dissolved Oxygen 00300 Daily Average> 6.0 mg/L Daily Grab Effluent
Fecal Coliform 61211 200/100 mL 400/100 mL 2/Week4 Grab Effluent
(geometric mean)
)
Total Nitrogens,mg/L C0600 Monitor&Report Monthly Composite Effluent
Total Phosphorous,mg/L C0665 Monitor&Report Monthly Composite Effluent
Temperature(°C) 00010 Monitor&Report Daily Grab Effluent
pH 00400 Between 6.0 and 9.0 standard units Daily Grab Effluent
Total Hardness[as 00900 Quarterly Composite Effluent
CaCO3]6,mg/L
Chronic Toxicity' THP3B See Note 5. Quarterly Composite Effluent
Effluent Pollutant Scan NC01 Monitor&Report See Condition A. (6.)
Total Hardness[as 00900 Quarterly Grab Upstream
CaCO3]8,mg/L
Dissolved Oxygen,mg/L 00300 See Note 2. Grab Upstream&
Downstream
Temperature(°C) 00010 See Note 2. Grab Upstream&
Downstream
Notes:
1. The Permittee shall submit discharge monitoring reports electronically using NC DWR's eDMR application system. See
Special Condition A.(9.).
2. Sample locations:Upstream at Pavillion Boulevard and downstream at NCSR 1300 and at NCSR 1304(Rocky River). Stream
samples shall be grab samples and shall be collected 3/Week during the months of June,July,August,and September and
1/Week during the remaining months of the year.Should the permittee elect to participate in the Yadkin-Pee Dee River
Basin Association,instream sampling shall be provisionally waived.
3. The monthly average CBODS and Total Suspended Solids concentrations shall not exceed 15%of the respective influent value
(85%removal).
4. 2/Week sampling must occur on any two non-consecutive days during the calendar week.
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. Effluent hardness sampling shall be performed in conjunction with testing for hardness dependent metals(Copper,Zinc,
Chromium,Cadmium,Nickel,Silver and Lead).
Page 7 of 14

Permit NC0030210
Notes(Continued):
7. Chronic Toxicity(Ceriodaphnia dubia)P/F at 90%:March,June,September and December;See Special Condition A.(5.)of
this permit.
8. The Permittee shall sample instream hardness,upstream of the facility's discharge.The sample shall be representative of the
hardness in the receiving stream.If the Permittee is a member of the Monitoring Coalition Program,sampling for instream
hardness may be waived as long as the Monitoring Coalition agrees to sample hardness at the nearest upstream location,at a
minimum frequency of quarterly,and the Permittee has obtained approval from DWR-NPDES Permitting Unit that the
upstream station being monitored by the Coalition is representative of the receiving stream for this discharge.The Permittee is
responsible for submitting instream hardness test results with its permit renewal application package.If Coalition membership is
cancelled or the 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.
The Permittee shall discharge no floating solids or foam visible in other than trace amounts.
A(5.)CHRONIC TOXICITY PERMIT LIMIT(QUARTERLY)
[15A NCAC 02B.0200]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 90%at 12.0 MGD, 13.1 MGD, 14.9 MGD and 16.0 MGD flow
regimes.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the "North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure,"Revised December 2010, or subsequent versions or
"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"(Revised-December 2010)or subsequent
versions.The tests will be performed during the months of March,June, September and December. These months
signify the first month of each three-month toxicity testing quarter assigned to the facility. Effluent sampling for
this testing must be obtained during representative effluent discharge and shall be performed at 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 on the Effluent Discharge
Monitoring Form (MR-1) 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,NC 27699-1621
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.
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Permit NC0030210
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be
required during the following month. Assessment of toxicity compliance is based on the toxicity testing quarter,
which is the three month time interval that begins on the first day of the month in which toxicity testing is required
by this permit and continues until the final day of the third month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water
Resources indicate potential impacts to the receiving stream,this permit may be re-opened and modified to include
alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism
survival,minimum control organism reproduction,and appropriate environmental controls,shall constitute an invalid
test and will require immediate follow-up testing to be completed no later than the last day of the month following
the month of the initial monitoring.
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Permit NC0030210
A. (6.) EFFLUENT POLLUTANT SCAN
[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: 2020, 2021, and 2022. Analytical methods shall be in
accordance with 40 CFR Part 136 and shall be sufficiently sensitive to determine whether parameters are present
in concentrations greater than applicable standards and criteria. Samples should be collected with one quarterly
toxicity test each year,and must represent seasonal variation[i.e.,do not sample in the same quarter every year].
Unless otherwise indicated,metals shall be analyzed as"total recoverable."
Ammonia(as N) Trans-1,2-dichloroethylene Bis(2-chloroethyl)ether
Chlorine(total residual,TRC) 1,1-dichloroethylene Bis(2-chloroisopropyl)ether
Dissolved oxygen 1,2-dichloropropane Bis(2-ethylhexyl)phthalate
Nitrate/Nitrite 1,3-dichloropropylene 4-bromophenyl phenyl ether
Kjeldahl nitrogen Ethylbenzene Butyl benzyl phthalate
Oil and grease Methyl bromide 2-chloronaphthalene
Phosphorus Methyl chloride 4-chlorophenyl phenyl ether
Total dissolved solids Methylene chloride Chrysene
Hardness 1,1,2,2-tetrachloroethane Di-n-butyl phthalate
Antimony Tetrachloroethylene Di-n-octyl phthalate
Arsenic Toluene Dibenzo(a,h)anthracene
Beryllium 1,1,1-trichloroethane 1,2-dichlorobenzene
Cadmium 1,1,2-trichloroethane 1,3-dichlorobenzene
Chromium Trichloroethylene 1,4-dichlorobenzene
Copper Vinyl chloride 3,3-dichlorobenzidine
Lead Acid-extractable compounds: Diethyl phthalate
Mercury(EPA Method 1631E) P-chloro-m-cresol Dimethyl phthalate
Nickel 2-chlorophenol 2,4-dinitrotoluene
Selenium 2,4-dichlorophenol 2,6-dinitrotoluene
Silver 2,4-dimethylphenol 1,2-diphenylhydrazine
Thallium 4,6-dinitro-o-cresol Fluoranthene
Zinc 2,4-dinitrophenol Fluorene
Cyanide 2-nitrophenol Hexachlorobenzene
Total phenolic compounds 4-nitrophenol Hexachlorobutadiene
Volatile organic compounds: Pentachlorophenol Hexachlorocyclo-pentadiene
Acrolein Phenol Hexachloroethane
Acrylonitrile 2,4,6-trichlorophenol Indeno(1,2,3-cd)pyrene
Benzene Base-neutral compounds: Isophorone
Bromoform Acenaphthene Naphthalene
Carbon tetrachloride Acenaphthylene Nitrobenzene
Chlorobenzene Anthracene N-nitrosodi-n-propylamine
Chlorodibromomethane Benzidine N-nitrosodimethylamine
Chloroethane Benzo(a)anthracene N-nitrosodiphenylamine
2-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
Reporting. Test results shall be reported on DWR Form-A MR-PPA1 (or in a form approved by the
Director)by December 31 St 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.
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Permit NC0030210
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
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.) REUSE OF TREATMENT PLANT EFFLUENT
[G.S. 143-215.1(b)]
The tertiary treated effluent from the Mallard Creek WRF is authorized by the Division for reuse around the
existing wastewater treatment facility provided the following conditions are met:
• The irrigation water will supplement rainfall during dry periods of the year only;
• The effluent applied will be quantified by a meter;
• The maximum application rate shall not exceed 0.25-inch/hour or 1.0-inch/day;
• No runoff shall occur from the irrigated areas;
• Appropriate notice shall be supplied at the entrance of the facility indicating that the area is being irrigated
with reclaimed water that should not be used for drinking;and
All irrigation shall occur within the fenced perimeter of the wastewater treatment plant with controlled public
access.
A. (8.). MERCURY MINIMIZATION PLAN (MMP)
[G.S. 143-215.1 (b)]
The permittee shall develop and implement a mercury minimization plan during this permit term. The MMP shall
be developed within 180 days of the NPDES Permit Effective Date,and shall be available for inspection on-site. A
sample MMP was developed through a stakeholder review process and has been placed on the Division website for
guidance (https://deq.nc.gov/document/nc-model-mercury-minimization-plan-dwr-nudes-swp-20130801). 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.
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Permit NC00302 10
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 Part II of this permit
(Standard Conditions for NPDES Permits):
• Section B.(11.) Signatory Requirements
• Section D.(2.) Reporting
• Section D.(6.) Records Retention
• Section E.(5.) Monitoring Reports
1. Reporting Requirements[Supersedes Section D.(2.)and Section E. (5.)(a)1
The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic
Discharge Monitoring Report(eDMR)internet application.
Monitoring results obtained during the previous month(s)shall be summarized for each month and
submitted electronically using eDMR. The eDMR system allows permitted facilities to enter monitoring
data and submit DMRs electronically using the internet. Until such time that the state's eDMR
application is compliant with EPA's Cross-Media Electronic Reporting Regulation(CROMERR),
permittees will be required to submit all discharge monitoring data to the state electronically using
eDMR and will be 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 on December 21,2020,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 NC0030210
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. Sianatory 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:
Page 13 of 14

Permit NC0030210
"I certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with asystem designed to assure thatqualified ersonnel
P g+1 P
properly gather and evaluate the information submitted.Based on my inquiry of the person or persons
who manage the system, or those persons directly responsible for gathering the information, the
information submitted is, to the best of my knowledge and belief true, accurate, and complete.I am
aware that there are significant penalties for submitting false information, including the possibility of
fines and imprisonment for knowing violations."
5. Records Retention [Supplements Section D. (6.)1
The permittee shall retain records of all Discharge Monitoring Reports,including eDMR submissions.
These records or copies shall be maintained for a period of at least 3 years from the date of the report.
This period may be extended by request of the Director at any time[40 CFR 122.41].
Page 14 of 14

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USGS Quad Name: Harrisburg Lat.: 35°19'52" County
Receiving Stream: Mallard Creek Long.: 80°41'54"
Stream Class: C
Subbasin: Yadkin -030711 North Not to SCALE