NC0020354_Draft Permit_20210309

_,01.
ROY COOPER 1 . s
Governor Jr
MICHAEL S.REGAN �.n
Secretary a 0i"""�
S.DANIEL SMITH NORTH CAROLINA
Director Environmental Quality
March 9, 2021
Mr. Timothy R. Smith,Vice President
Chatham Park Investors LLC
105 Weston Estates Way
Cary,North Carolina 27513
Subject: Draft NPDES Permit Renewal&Modification
Permit NC0020354
Pittsboro WWTP/CPWRC
Chatham County
Grade III Biological WPCS
SIC Code 4952
Dear Mr. Smith:
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:
• Chatham Park Investors LLC has been added as a co-permittee,and CPWRC has been
added to the permit,along with associated limits tables and special conditions.
• To accommodate for the CPWRC's discharge into Robeson Creek,Outfall 001 has been
split into Outfalls OOIA,to which the Pittsboro WWTP will report its discharge,and Outfall
OO1B,to which the CPWRC will report its discharge[See A.(1.)and A.(2.)].
• To ensure the Robeson Creek TP TMDL is maintained with the addition of the CPWRC
and the combined flow does not exceed 1.249 MGD,a combined outfall CO1 (001 A+001 B)
has been added to the permit [See A. (4.)].
• As Outfall 001 has been divided into Outfalls OO1A and OO1B,Combined Outfall CO2
now combines Outfalls OOIA,OO1B and 002 [See A.(5.)].
• Per 15A NCAC 08G .0302,the Pittsboro WWTP facility class has been changed to Grade
IV due to the nutrient limits in the permit and the rule conditions.To ensure concurrent
sampling,the monitoring frequency of a Grade IV facility has also been applied to the
Chatham Park Water Recovery Center(CPWRC). This does not impact the grade of the
CPWRC.
• As the Pittsboro WWTP facility class has been updated,monitoring frequencies for BOD,
ammonia,TSS,conductivity,TRC,pH and dissolved oxygen have been revised to reflect a
Grade IV facility[See A.(1.)A.(2.)and A.(3.)].
• To ensure representative sampling,effluent sample locations have been specified for
dissolved oxygen, fecal coliform and pH [See A.(1.),A.(2.)and A.(3.)].
• Per the results of instream waste concentration (IWC)-based calculations for ammonia-
nitrogen,ammonia nitrogen limits have been revised for the Pittsboro WWTP [See A.(2.)].
• Based on the reasonable potential analysis (RPA) showing no reasonable potential to
violate state water quality standards at Outfall 001,the monitoring requirements for total nickel
and total zinc have been removed from the permit[See A.(1.)].
D E Q North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11617 Mail Service Center I Raleigh.North Carolina 27699-1617
919.707.9000

The NPDES standard conditions(Parts II,III,and IV)that are a part of the permit are not included
in this draft document (cover, map, and Part I). The conditions are the same as in your current
permit except that agency and division names have been updated.The latest version is available at
https://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 Chatham 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,
21A/-
Nick Coco,Engineer
NPDES Municipal Permitting Unit
Hardcopy: NPDES Files
Ecopy: US EPA Region 4
DWR/Raleigh Regional Office/Water Quality/Scott Vinson
DWR/Operator Certification Program/Maureen Kinney
DWR/Ecosystems Branch/Mark Vander Borgh
DWR/Aquatic Toxicology Branch/Cindy Moore and Zachary Thomas
DWR/Public Water Supply/Shawn Guyer
Consultant/Engineer/Becky Smith
Page 3 of 3

ROY COOPER k.41 ,--1:
Governor . �,MICHAEL S.REGAN .
Secretary
S.DANIEL SMITH NORTH CAROLINA
Director Environmental Quality
March 9,2021
Mr. John Poteat,Public Works and Utilities Director
Town of Pittsboro
P.O. Box 759
Pittsboro,North Carolina 27312
Subject: Draft NPDES Permit Renewal&Modification
Permit NC0020354
Pittsboro WWTP/CPI Facility
Chatham County
Grade IV Biological WPCS
SIC Code 4952
Dear Mr. Poteat:
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:
• Chatham Park Investors LLC has been added as a co-permittee,and CPWRC has been
added to the permit,along with associated limits tables and special conditions.
• To accommodate for the CPWRC's discharge into Robeson Creek,Outfall 001 has been
split into Outfalls 001A,to which the Pittsboro WWTP will report its discharge, and Outfall
OO1B,to which the CPWRC will report its discharge[See A.(1.)and A.(2.)].
• To ensure the Robeson Creek TP TMDL is maintained with the addition of the CPWRC
and the combined flow does not exceed 1.249 MGD,a combined outfall C01 (001 A+001 B)
has been added to the permit [See A. (4.)].
• As Outfall 001 has been divided into Outfalls OO1A and OO1B,Combined Outfall CO2
now combines Outfalls OOIA,OO1B and 002 [See A.(5.)].
• Per 15A NCAC 08G .0302,the Pittsboro WWTP facility class has been changed to Grade
IV due to the nutrient limits in the permit and the rule conditions. To ensure concurrent
sampling,the monitoring frequency of a Grade IV facility has also been applied to the
Chatham Park Water Recovery Center(CPWRC). This does not impact the grade of the
CPWRC.
• As the Pittsboro WWTP facility class has been updated,monitoring frequencies for BOD,
ammonia,TSS,conductivity,TRC,pH and dissolved oxygen have been revised to reflect a
Grade IV facility[See A.(1.)A.(2.)and A.(3.)].
• To ensure representative sampling,effluent sample locations have been specified for
dissolved oxygen, fecal coliform and pH [See A.(1.),A.(2.) and A.(3.)].
• Per the results of instream waste concentration (IWC)-based calculations for ammonia-
nitrogen,ammonia nitrogen limits have been revised for the Pittsboro WWTP [See A.(2.)].
• Based on the reasonable potential analysis (RPA) showing no reasonable potential to
violate state water quality standards at Outfall 001,the monitoring requirements for total nickel
and total zinc have been removed from the permit[See A.(1.)].
D
_E Q Non of oil Quality I W Rerc
512 NorthrthCaroli SalisbauryDepartment Street 11617Envir Mail n Serviceental Center Raleigh.Division Northof Carolinaater sou
2769es9 1617
beZa�Prf er.": / 919.7079000

• Based on the reasonable potential analysis (RPA) showing reasonable potential to violate
state water quality standards at Outfall 001,total copper and nitrate limits have been added to
the permit and along with monthly monitoring [See A.(1.),A.(2.)and A.(3.)].
• To provide an opportunity for the Town to develop a plan to assess sources of total copper
and nitrate, and to implement treatment for ammonia in order to come in compliance with the
limits in Section A.(2.), a 3-year schedule of compliance has been added to the permit [See
Special Condition A. (12.) Schedule of Compliance for Total Copper, Ammonia and Nitrate
Limitations(Outfall 001A)].
• Based on the reasonable potential analysis(RPA)predicting a maximum effluent total
dissolved solids concentration that is greater than half of the allowable discharge
concentration based on state water quality standards at Outfall 001,quarterly monitoring for
total dissolved solids has been added to the permit[See A.(1),A.(2)and A.(3.)].
• Based on the reasonable potential analysis (RPA) showing no reasonable potential to
violate state water quality standards at Outfall 002, the monitoring requirements for total
nickel,total copper and total zinc have been removed from the permit[See A.(4.)].
• 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 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.
• The Town of Pittsboro reported Total Lead and Total Silver at less than detection,with
detection levels< 10.0 µg/L in the 2019 Effluent Pollutant Scan.The Town's allowable
discharge concentrations are 8.86 µg/L and 0.062 µg/L for Total Lead and Total Silver,
respectively. DWR's laboratory identifies the target Practical Quantification Limits(PQLs)
for Total Lead and Total Silver as 2.0 µg/L, and 1.0 µg/L,respectively. 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
are capable of achieving a detection level below the permit discharge requirement(or
allowable discharge concentration)the method with the lowest detection level must be used.
Both co-permittees shall use sufficiently sensitive test methods for all pollutants,including
when performing Effluent Pollutant Scans.
• Some of the wording has changed in Special Condition A. (10.), Chronic Toxicity Permit
Limit,please review each paragraph carefully.
• Special Condition A. (11.) has been modified to the conditional statement, "Upon
expansion of design flow above 1.0 MGD, establishment of a pretreatment program, or
connection to the Big Buffalo WWTP,whichever happens first,the Permittee shall perform a
total of three (3) Effluent Pollutant Scans for all parameters listed below. Once this has
occurred,the tests shall be performed in three(3)consecutive years."In addition,at the end of
the Special Condition, 2nd species Toxicity Testing Requirements for municipal permit
renewals per Federal Regulations [40 CFR 122.21(j)(5)] have been added.
• A notation was made concerning the Electronic Reporting Rule — NPDES Electronic
Reporting Rule — Phase 2 Extension. EPA extended the Phase 2 deadline to December 21,
2025.
• Parameter codes have been added to the Effluent Limitations and Monitoring Requirements
[ See A.(1.)—A.(6.)].
• Regulatory citations have been added to the permit.
Page 2 of 3

i
• Based on the reasonable potential analysis(RPA) showing reasonable potential to violate
state water quality standards at Outfall 001, total copper and nitrate limits have been added to
the permit and along with monthly monitoring [See A.(1.),A.(2.)and A.(3.)].
• To provide an opportunity for the Town to develop a plan to assess sources of total copper
and nitrate,and to implement treatment for ammonia in order to come in compliance with the
limits in Section A.(2.), a 3-year schedule of compliance has been added to the permit [See
Special Condition A. (12.) Schedule of Compliance for Total Copper, Ammonia and Nitrate
Limitations(Outfall 001 A)].
• Based on the reasonable potential analysis(RPA)predicting a maximum effluent total
dissolved solids concentration that is greater than half of the allowable discharge
concentration based on state water quality standards at Outfall 001,quarterly monitoring for
total dissolved solids has been added to the permit[See A.(1),A.(2)and A.(3.)].
• Based on the reasonable potential analysis (RPA) showing no reasonable potential to
violate state water quality standards at Outfall 002, the monitoring requirements for total
nickel,total copper and total zinc have been removed from the permit[See A.(4.)].
• 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 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.
• The Town of Pittsboro reported Total Lead and Total Silver at less than detection,with
detection levels< 10.0 gg/L in the 2019 Effluent Pollutant Scan.The Town's allowable
discharge concentrations are 8.86 gg/L and 0.062 gg/L for Total Lead and Total Silver,
respectively.DWR's laboratory identifies the target Practical Quantification Limits(PQLs)
for Total Lead and Total Silver as 2.0 gg/L,and 1.0 gg/L,respectively. 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
are capable of achieving a detection level below the permit discharge requirement(or
allowable discharge concentration)the method with the lowest detection level must be used.
Both co-permittees shall use sufficiently sensitive test methods for all pollutants,including
when performing Effluent Pollutant Scans.
• Some of the wording has changed in Special Condition A. (10.), Chronic Toxicity Permit
Limit,please review each paragraph carefully.
• Special Condition A. (11.) has been modified to the conditional statement, "Upon
expansion of design flow above 1.0 MGD, establishment of a pretreatment program, or
connection to the Big Buffalo WWTP,whichever happens first,the Permiee shall perform a
total of three (3) Effluent Pollutant Scans for all parameters listed below. Once this has
occurred,the tests shall be performed in three(3)consecutive years."In addition,at the end of
the Special Condition, 2nd species Toxicity Testing Requirements for municipal permit
renewals per Federal Regulations [40 CFR 122.21(j)(5)] have been added.
• A notation was made concerning the Electronic Reporting Rule — NPDES Electronic
Reporting Rule — Phase 2 Extension. EPA extended the Phase 2 deadline to December 21,
2025.
• Parameter codes have been added to the Effluent Limitations and Monitoring Requirements
[ See A.(1.)—A.(6.)].
• Regulatory citations have been added to the permit.
Page 2 of 3

The NPDES standard conditions(Parts II,III,and IV)that are a part of the permit are not included
in this draft document (cover, map, and Part I). The conditions are the same as in your current
permit except that agency and division names have been updated.The latest version is available at
https://bit.ly/3k5NFaL and can be viewed online or downloaded as a PDF file.
Concurrent with this notification the Division is publishing a notice in a newspaper having
circulation in the general Chatham 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,
Nick Coco,Engineer
NPDES Municipal Permitting Unit
Hardcopy: NPDES Files
Ecopy: US EPA Region 4
DWR/Raleigh Regional Office/Water Quality/Scott Vinson
DWR/Operator Certification Program/Maureen Kinney
DWR/Ecosystems Branch/Mark Vander Borgh
DWR/Aquatic Toxicology Branch/Cindy Moore
DWR/Public Water Supply/Allen Hardy
Consultant/Engineer/Becky Smith
Page 3 of 3

NPDES Permit NC0020354
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
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 Pittsboro and Chatham Park Investors LLC
are hereby authorized to discharge wastewater from a facility located at the
Town of Pittsboro WWTP
458 Small Street
Chatham County
Chatham Park Water Recovery Center
2261 US Highway 64 Business East
Chatham County
to receiving waters designated as Robeson Creek and the Haw River in the Cape Fear River Basin
in accordance with effluent limitations,monitoring requirements,and other conditions set forth in
Parts I,II,III,and IV hereof.
This permit shall become effective Month xx,2021.
This permit and the authorization to discharge shall expire at midnight on April 30, 2026.
Signed this day Month xx, 2021.
DRAFT
for S. Daniel Smith, Director
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 25

NPDES Permit NC0020354
• SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby superseded.As of
this permit issuance,any previously issued permit bearing this number is no longer effective. Therefore, the exclusive
authority to operate and discharge from this facility arises under the permit conditions, requirements, terms, and
provisions included herein.
The Town of Pittsboro
is hereby authorized to:
1. Continue to operate an existing 0.75 MGD extended aeration treatment system consisting of the
following components:
• Influent pump station
• Manual and mechanical bar screens
• Two(2)Equalization Basins
• Two(2)Secondary Clarifiers
• Two(2)Aeration Basins with fine bubble diffusers
• Three(3)Tertiary filters
• Phosphorous removal b=„
• Ultraviolet disinfection `y_
• Rotary Drum Thickener
• Aerobic sludge digestion
• On-site generator
• Waste Activated Sludge pump station
• Effluent flow measurement
• Cascade post aeration
The facility is located at the Pittsboro WWTP,458 Small St.,Pittsboro in Chatham County.
2. After receiving an Authorization to Construct from the Division and upon submittal of an
engineer's certification:
• construct a 2 MGD force main to the Big Buffalo WWTP(NC0024147)in Sanford,NC,and;
• decommission the existing Pittsboro WWTP.
3. After receiving an Authorization to Construct from the Division and submitting an engineer's
certification,construct and operate a 2.721 MGD wastewater treatment facility.
4. Discharge from said treatment works at the locations specified on the attached map into Robeson
Creek(0.75 MGD,outfall OO1A),and into the Haw River(1.971 MGD,outfall 002),both classified as
WS-IV NSW waters in the Cape Fear River Basin;and
(Continues on next page.)
Page 2 of 25

NPDES Permit NC0020354
Chatham Park Investors LLC
is hereby authorized to:
1. After receiving an Authorization to Construct from the Division for both the activation of the
existing Chatham Park WRC(formerly known as the Chatham Park Decentralized Water Resource
Recovery Facility)as a direct discharge facility and the connection of necessary sewer line to the
Town of Pittsboro's collection system for discharge through Outfall 001B,operate an existing 0.499
MGD treatment system consisting of the following components:
• Influent pump station
• Mechanical bar screens
• Influent three-way splitter box
• Odor control
• Chemical feed system
• Phosphorous removal
• Four-stage biological membrane bio reactor system
• Intermediate screening
• Membrane filtration
• Sludge holding tank
• Raw wastewater transfer pump station
• Ultraviolet disinfection
• Chlorine disinfection for reclaimeater
• Reclaimed water holding tank
• Reclaimed water pump station
• Effluent flow measurement
• Effluent pump station
The facility is located at the Chatham Park WRC,2261 US Highway 64 Business East,Pittsboro in
Chatham County.
2. Discharge from said treatment works at the location specified on the attached map into Robeson
Creek(0.499 MGD,outfall 001B),classified as WS-IV NSW waters in the Cape Fear River Basin.
NOTE: The use of"Permittee" in this permit generally refers to both Co-Permittees,which share
responsibilities for the discharge.However,it may refer to one Co-Permittee or the other,depending on
the context.All Co-Permittees are jointly liable for violations of this permit,regardless of any and all
external Agreements between parties. External agreement conditions do not override or supersede
regulatory conditions.
Page 3 of 25

NPDES Permit NC0020354
PART I-MONITORING,CONTROLS,AND LIMITATIONS FOR PERMITTED DISCHARGES
A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS-Outfall 001A
[15A NCAC 02B .0400 et seq.,02B .0500 et seq.] Grade IV Biological Water
Pollution Control System [15A NCAC 08G .0302]
(a.) Beginning upon the effective date of this permit and lasting for a period of three (3)years or until
decommissioning of the existing plant,whichever comes first, the Town of Pittsboro is authorized
to discharge treated wastewater from Outfall OO1A to Robeson Creek. Such discharges shall be
limited and monitored) by the Permittee as specified below:
PARAMETER EFFLUENT LIMITATIONS MONITORING REQUIREMENTS
Parameter Code Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location2
Flow 50050 0.75 MGD 1 Continuous Recording I or E
Total Monthly Flow, 82220 Monitor and Report Monthly Recorded or I or E
MG/month Calculated
BOD5(20°C)3 C0310 5.0 mg/L 7.5 mg/L Daily Composite I and E
(April 1 -October 31)
(20°C)3 C0310 10.0 mg/L 15.0 mg/L Daily Composite I and E
(November 1-March 31)
Total Suspended Solids3 C0530 30.0 mg/L 45.0 mg/L Daily Composite I and E
Ammonia(NH3 as N) C0610 2.0 mg/L 6.0 mg/L Daily Composite E
Total Residual Chlorine4 50060 17 pg/L Daily Grab E
pH 00400 Between 6.0 and 9.0 standard units Daily Grab E
Temperature,°C 00010 Monitor and Report Daily Grab E
Dissolved Oxygens 00300 Monitor and Report Daily Grab E
Fecal Coliform 31616 200/100 mL 400/100 mL Daily Grab E
(geometric mean)
Conductivity 00094 Monitor and Report Daily Grab E
TKN(mg/L)6 00625 Monitor and Report Weekly Composite E
NO3-N+ NO2-N(mg/L)6 00630 Monitor and Report Weekly Composite E
TN(mg/L)6 C0600 Monitor and Report Weekly Composite E
TN Load'.s QM600 Monitor&Report(lb/mo) Monthly Calculated E
QY600 Monitor&Report(Ib/yr) Annually
Total Phosphorus C0665 2.0 mg/L(quarterly average)9 Weekly Composite E
TP Load'.e QM665 Monitor&Report(lb/mo) Monthly Calculated E
QY665 Monitor&Report(Ib/yr) Annually
Nitrate10 00620 Monitor&Report(mg/L) Monthly Composite E
Total Copper10 01042 Monitor&Report(pg/L) Monthly Composite E
TDS 70295 Monitor and Report Quarterly Composite E
Total Hardness[as
CaCO3],mg/L" 00900 Monitor and Report Quarterly Composite E
Chronic Toxicity12 TGP3B See Note 12 Quarterly Composite E
Effluent Pollutant Scan NC01 Monitor and Report Footnote 13 E
All footnotes are listed on the following page.
Page 4 of 25

NPDES Permit NC0020354
Footnotes from Effluent Limitations and Monitoring Requirements(Outfall 001A):
1. The Permittee shall submit discharge monitoring reports electronically using NC DWR's eDMR
application system. See Special Condition A.(13.)
2. Sample locations: I=Influent;E=Effluent
3. The monthly average BOD5 and Total Suspended Residue concentrations shall not exceed 15%of the
respective influent value(85%removal).
4. Total Residual Chlorine limit applies if chlorine or chlorine derivative is used for disinfection.The
Division shall consider all effluent TRC values reported below 50 µg/I to be in compliance with this
permit. The Permittee shall continue to record and submit all values reported by a North Carolina
certified laboratory even if these values fall below 50 µg/l.
5. Effluent sampling for dissolved oxygen shall be conducted at the cascade aerator,just prior to discharge
into Robeson Creek.
6. 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.
7. TN or TP Load is the mass quantity of Total Nitrogen or Phosphorus discharged in a given period of
time.See Condition A.(9.).
8. Limits for TN and TP are specified in Conditions A.(5.)and A.(6.).Compliance with mass limits shall be
determined in accordance with Conditions A.(7.)and A.(8.).
9. The quarterly average for total phosphorus shall be the average of composite samples collected weekly
during each calendar quarter(January-March,April-June,July-September,October-December).
10. The Permittee shall achieve compliance with total copper and nitrate limitations specified in Section
A.(2.)within three years of the effective date of this permit and shall follow the compliance schedule
detailed in Special Condition A.(12.).Starting on the effective date of this permit,the Permittee shall
perform monthly effluent Monitoring and Reporting for Nitrate and Total Copper.
11. Effluent hardness sampling should be performed in conjunction with testing for hardness dependent
metals(cadmium,copper,lead,nickel,silver,and zinc).
12. Chronic Toxicity(Ceriodaphnia)P/F at 90%;March,June,September&December.See Condition A.(10.).
13. The Effluent Pollutant Scan requirement applies once the facility exceeds a design flow of 1.0 MGD,
establishes a pretreatment plan,or connects to Big Buffalo WWTP.The Permittee shall perform three
effluent pollutant scans during the term of this permit[see condition A.(11.)].
(b.) There shall be no discharge of floating solids or foam in other than trace amounts.
Page 5 of 25

NPDES Permit NC0020354
A.(2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS-Outfall 001A
[15A NCAC 02B .0400 et seq.,02B .0500 et seq.] Grade IV Biological Water
Pollution Control System [15A NCAC 08G .0302]
(a.) During the period beginning three(3) years after the effective date of this permit and lasting until
expiration or decommissioning of the existing plant,whichever comes first,the Town of Pittsboro
is authorized to discharge treated wastewater from Outfall 001A to Robeson Creek. Such
discharges shall be limited and monitored3 by the Permittee as specified below:
PARAMETER EFFLUENT LIMITATIONS MONITORING REQUIREMENTS
Parameter Code Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location2
Flow 50050 0.75 MGD Continuous Recording I or E
Total Monthly Flow, Recorded or
MG/month 82220 Monitor and Report Monthly Calculated I or E
BODs(20°C)3 C0310 5.0 mg/L 7.5 mg/L Daily Composite I and E
(April 1-October 31) -
(20°C)3 C0310 10.0 mg/L 15.0 mg/L Daily Composite I and E
(November 1-March 31)
Total Suspended Solids3 C0530 30.0 mg/L 45.0 mg/L Daily Composite I and E
Ammonia(NH3 as N) C0610 1.0 mg/L 3.0 mg/L Daily Composite E
Total Residual Chlorine4 50060 17 pg/L Daily Grab E
pH 00400 Between 6.0 and 9.0 standard units Daily Grab E
Temperature,°C 00010 Monitor and Report Daily Grab E
Dissolved Oxygen5 00300 Monitor and Report Daily Grab E
Fecal Coliform 31616 200/100 mL 400/100 ml Daily Grab E
(geometric mean)
Conductivity 00094 Monitor and Report Daily Grab E
TKN(mg/L)6 00625 Monitor and Report Weekly Composite E
NO3-N+ NO2-N(mg/L)6 00630 Monitor and Report Weekly Composite E
TN(mg/L)6 C0600 Monitor and Report Weekly Composite E
QM600 Monitor&Report(lb/mo) Monthly
TN Load'.s QY600 Monitor&Report(Ib/yr) Annually Calculated E
Total Phosphorus C0665 2.0 mg/L(quarterly average)9 Weekly Composite E
TP Load'.e QM665 Monitor&Report(lb/mo) Monthly Calculated E
QM665 Monitor&Report(Ib/yr) Annually
Nitrate 00620 10.2 mg/L Monthly Composite E
Total Copper 01042 18.5 pg/L 26.7 pg/L Monthly Composite E
TDS 70295 Monitor and Report Quarterly Composite E
Total Hardness[as 00900 Monitor and Report
CaCO3],mg/L10 Quarterly Composite E
Chronic Toxicityll TGP3B See Note 11 Quarterly Composite E
Effluent Pollutant Scan NC01 Monitor and Report Footnote 12 E
All footnotes are listed on the following page.
Page 6 of 25

NPDES Permit NC0020354
Footnotes from Effluent Limitations and Monitoring Requirements (Outfa11001A):
1. The Permittee shall submit discharge monitoring reports electronically using NC DWR's eDMR
application system. See Special Condition A.(13.)
2. Sample locations: I=Influent;E=Effluent
3. The monthly average BOD5 and Total Suspended Residue concentrations shall not exceed 15%of the
respective influent value(85%removal).
4. Total Residual Chlorine limit applies if chlorine or chlorine derivative is used for disinfection.The
Division shall consider all effluent TRC values reported below 50 µg/1 to be in compliance with this
permit. The Permittee shall continue to record and submit all values reported by a North Carolina
certified laboratory even if these values fall below 50 µg/l.
5. Effluent sampling for dissolved oxygen shall be conducted at the cascade aerator,just prior to discharge
into Robeson Creek.
6. 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.
7. TN or TP Load is the mass quantity of Total Nitrogen or Phosphorus discharged in a given period of
time.See Condition A.(9.).
8. Limits for TN and TP are specified in Conditions A.(5.)and A.(6.).Compliance with mass limits shall be
determined in accordance with Conditions A.(7.)and A.(8.).
9. The quarterly average for total phosphorus shall be the average of composite samples collected weekly
during each calendar quarter(January-March,April-June,July-September,October-December).
10. Effluent hardness sampling should be performed in conjunction with testing for hardness dependent
metals(cadmium,copper,lead,nickel,silver,and zinc).
11. Chronic Toxicity(Ceriodaphnia)P/F at 90%;March,June,September&December.See Condition A.(10.).
12. The Effluent Pollutant Scan requirement applies once the facility exceeds a design flow of 1.0 MGD,
establishes a pretreatment plan,or connects to Big Buffalo WWTP.The Permittee shall perform three
effluent pollutant scans during the term of this permit[see condition A. (11.)].
(b.) There shall be no discharge of floating solids or foam in other than trace amounts.
Page 7 of 25

NPDES Permit NC0020354
A.(3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS -Outfal1001B
[15A NCAC 02B .0400 et seq.,02B .0500 et seq.] Grade III Biological Water
Pollution Control System [15A NCAC 08G .0302] _
(a.) Beginning upon receipt of engineer's certificate for the construction of the sewer connection to the
Pittsboro WWTP and the activation of the Chatham Park Water Recovery Center,and lasting
until expiration,Chatham Park Investors LLC is authorized to discharge treated wastewater from
Outfall 001B to Robeson Creek. Such discharges shall be limited and monitored'by the Permittee
as specified below:
PARAMETER EFFLUENT LIMITATIONS MONITORING REQUIREMENTS
Parameter Code Monthly Daily Measurement Sample Sample
Average Maximum Frequency Type Location2
Flow 50050 0.499 MGD Continuous Recording I or E
Total Monthly Flow, Recorded or
MG/month 82220 Monitor and Report Monthly Calculated I or E
BODs(20°C)3 C0310 5.0 mg/L 7.5 mg/L Daily4 Composite I and E
(April 1-October 31)
BOD5(20°C)3 C0310 10.0 mg/L 15.0 mg/L Daily4 Composite I and E
(November 1 -March 31)
Total Suspended Solids3 C0530 30.0 mg/L 45.0 mg/L Daily4 Composite I and E
Ammonia(NH3 as N) C0610 1.0 mg/L 5.0 mg/L Daily4 Composite E
Total Residual Chlorines 50060 17 pg/L Daily4 Grab E
Between 6.0 and 9.0 standard
pH6 00400 units Daily4 Grab E
Temperature,°C 00010 Monitor and Report Daily Grab E
Dissolved Oxygen,mg/L6 00300 Monitor and Report Daily4 Grab E
Fecal Coliform6 31616 200/100 mL 400/100 mL Daily' Grab E
(geometric mean)
Conductivity 00094 Monitor and Report Daily4 Grab E
TKN, mg/L ' 00625 Monitor and Report Weekly Composite E
NO3-N+ NO2-N,mg/L ' 00630 Monitor and Report Weekly Composite E
TN,mg/L ' C0600 Monitor and Report Weekly Composite E
TN Load e,e QM600 Monitor&Report(lb/mo) Monthly Calculated E
QY600 Monitor&Report(Ib/yr) Annually
Total Phosphorus,mg/L C0665 2.0 mg/L(quarterly average)10 Weekly Composite E
TP Load s.9 QM665 Monitor&Report(lb/mo) Monthly Calculated E
QY665 Monitor&Report(Ib/yr) Annually
Nitrate 00620 10.2 mg/L Monthly Composite E
Total Copper 01042 18.5 pg/L 26.7 pg/L Monthly Composite E
TDS 70295 Monitor and Report Quarterly Composite E
Total Hardness[as CaCO3], 00900 Monitor and Report Quarterly Composite E
mg/Lll
Chronic Toxicity12 TGP3B See Note 12 Quarterly Composite E
Effluent Pollutant Scan NC01 Monitor and Report Footnote 13 E
All footnotes are listed on the following page.
Page 8 of 25

NPDES Permit NC0020354
Footnotes from Effluent Limitations and Monitoring Requirements(Outfall 001B):
1. The Permittee shall submit discharge monitoring reports electronically using NC DWR's eDMR
application system. See Special Condition A.(13.)
2. Sample locations: I=Influent;E=Effluent
3. The monthly average BOD5 and Total Suspended Residue concentrations shall not exceed 15%of the
respective influent value(85%removal).
4. Upon decommissioning of the Pittsboro WWTP,and upon Division approval of a submitted data review
and monitoring frequency reduction justification for each parameter,begin sampling for BOD5,TSS,
ammonia,total residual chlorine,pH,dissolved oxygen,fecal coliform and conductivity at a monitoring
frequency of 3/week.The frequency reduction could be for one or more or all parameters.
5. Total Residual Chlorine limit applies if chlorine or chlorine derivative is used for disinfection.The
Division shall consider all effluent TRC values reported below 50 µg/1 to be in compliance with this
permit. The Permittee shall continue to record and submit all values reported by a North Carolina
certified laboratory even if these values fall below 50 µg/l.
6. Effluent sampling for fecal coliform,pH and dissolved oxygen shall be conducted at the manhole
sampling location just prior to combination of flow with the Pittsboro WWTP.Upon decommissioning of
the Pittsboro WWTP,effluent sampling for dissolved oxygen shall instead be conducted at the cascade
aerator,just prior to discharge into Robeson Creek and effluent sampling for fecal coliform and pH shall
be conducted at the remaining Pittsboro WWTP UV disinfection channel.
7. TN=TKN+NO3-N+NOrN,where TN is Total Nitrogen,TKN is Total Kjeldahl Nitrogen,and NO3-N
and NOrN are Nitrate and Nitrite Nitrogen,respectively.
8. TN or TP Load is the mass quantity of Total Nitrogen or Phosphorus discharged in a given period of
time.See Condition A.(9.).
9. Limits for TN and TP are specified in Conditions A.(5.)and A.(6.).Compliance with mass limits shall be
determined in accordance with Conditions A.(7.)and A.(8.).
10. The quarterly average for total phosphorus shall be the average of composite samples collected weekly
during each calendar quarter(January-March,April-June,July-September,October-December).
11. Effluent hardness sampling should be performed in conjunction with testing for hardness dependent
metals(cadmium,copper,lead,nickel,silver,and zinc).
12. Chronic Toxicity(Ceriodaphnia)P/F at 90%;March,June,September&December.See Condition A.(10.).
13. The Effluent Pollutant Scan requirement applies once the facility exceeds a design flow of 1.0 MGD,
establishes a pretreatment plan,or connects to Big Buffalo WWTP.The Permittee shall perform three
effluent pollutant scans during the term of this permit[see condition A.(11.)].
(b.) There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 9 of 25

NPDES Permit NC0020354
A.(4.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - Outfall 002
[15A NCAC 02B .0400 et seq.,02B .0500 et seq.]Grade IV Biological Water
Pollution Control System [15A NCAC 08G .0302]
(a.) During the period beginning upon written acceptance from the Division of the Engineer's
Certification for the completion of construction resulting in discharge to the Haw River,and
lasting until expiration,the Town of Pittsboro is authorized to discharge treated wastewater from
Outfall 002 to the Haw River. Such discharges shall be limited and monitored.'by the Permittee
as specified below:
PARAMETER EFFLUENT LIMITATIONS MONITORING REQUIREMENTS
Parameter Code Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location2
Flow 50050 1.971 MGD Continuous Recording I or E
Total Monthly Flow, Recorded or
MG/month 82220 Monitor and Report Monthly Calculated I or E
BOD5(20°C)3 C0310 5.0 mg/L 7.5 mg/L Daily Composite I and E
(April 1-October 31)
BOD5(20°C)3 C0310 10.0 mg/L 15.0 mg/L Daily Composite I and E
(November 1 -March 31)
Total Suspended Solids3 C0530 30.0 mg/L 45.0 mg/L Daily Composite I and E
Ammonia(NH3 as N) C0610 1.0 mg/L 3.0 mg/L Daily Composite E
(April 1—October 31)
Ammonia(NH3 as N) C0610 2.0 mg/L 6.0 mg/L Daily Composite E
(November 1—March 31)
Total Residual Chlorine4 50060 28 pg/L Daily Grab E
pH 00400 Between 6.0 and 9.0 standard units Daily Grab E
Temperature,°C 00010 Monitor and Report Daily Grab E
Dissolved Oxygen 00300 Daily Average>_6.0 mg/L Daily Grab E
Fecal Coliform 31616 14/100 mL 25/100 mL Daily Grab E
(geometric mean)
Conductivity 00094 Monitor and Report Daily Grab E
TKN, mg/L s 00625 Monitor and Report Weekly _ Composite E
NO3-N+NO2-N,mg/L 5 00630 Monitor and Report Weekly Composite E
TN, mg/L 5 C0600 Monitor and Report Weekly Composite E
TN Load e' QM600 Monitor and Report(lb/mo) Monthly Calculated E
QY600 Monitor and Report(Ib/yr) Annually
Total Phosphorus, mg/L C0665 Monitor and Report Weekly Composite E
QM665 Monitor and Report(Ib/mo) Monthly
TP Load e' QY665 Monitor and Report(Ib/yr) Annually Calculated E
Total Hardness[as 00900 Monitor and Report Quarterly Composite E
CaCO3],mg/L8
Chronic Toxicity'? TGP3B See Note 9 Quarterly Composite E
Effluent Pollutant Scan NC01 Monitor and Report Footnote 10 E
Temperature,°C 00010 Monitor and Report Variable2 Grab U and D
Dissolved Oxygen 00300 Monitor and Report Variable2 Grab U and D
Fecal Coliform 31616 Monitor and Report Variable2 Grab U and D
(geometric mean)
Conductivity 00094 Monitor and Report Variable2 Grab U and D
Total Hardness[as
CaCO3],mg/L" 00900 Monitor and Report Quarterly Grab U
All footnotes are listed on the following page.
Page 10 of 25

NPDES Permit NC0020354
Footnotes from Effluent Limitations and Monitoring Requirements (Outfall 002):
1. The Permittee shall submit discharge monitoring reports electronically using NC DWR's eDMR application
system. See Special Condition A.(13.)
2. Sample locations: I=Influent;E=Effluent;U=Upstream at least 100 yards above the outfall;D=
Downstream at least 100 yards downstream from the outfall. Instream monitoring shall be conducted
3/Week during June,July,August,and September,and once per week during the remainder of the year.
Instream monitoring is provisionally waived in light of the Pennittee's participation in the Upper Cape Fear
River Basin Association.Instream monitoring shall be conducted as stated in this permit should the Permittee
end its participation in the Association.
3. The monthly average BOD5 and Total Suspended Residue concentrations shall not exceed 15%of the
respective influent value(85%removal).
4. Total Residual Chlorine limit applies if chlorine or chlorine derivative is used for disinfection.The Division
shall consider all effluent TRC values reported below 50 µg/I to be in compliance with this permit. The
Permittee shall continue to record and submit all values reported by a North Carolina certified laboratory
even if these values fall below 50 µg/1.
5. 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. TN or TP Load is the mass quantity of Total Nitrogen or Phosphorus discharged in a given period of time.
See Condition A.(9.).
7. Limits for TN and TP are specified in Condition A.(6.).Compliance with mass limits shall be determined in
accordance with Conditions A.(7.)and A.(8.).
8. Effluent hardness sampling should be performed in conjunction with testing for hardness dependent metals
(cadmium,copper,lead,nickel,silver,and zinc).
9. Chronic Toxicity(Ceriodaphnia)P/F at 4.0%;March,June,September&December.See Condition A.(10.).
10. The Permittee shall perform three effluent pollutant scans during the term of this permit[see condition A.
(11.)].
11. 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.
(b.) There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 11 of 25

NPDES Permit NC0020354
A.(5.)COMBINED LIMITATIONS-Outfall CO1(Combined Outfalls OO1A and 001B)
[15A NCAC 02B.0400 et seq.,02B.0500 et seq.]
Beginning upon the effective date of this permit and lasting until permit expiration,the Permittee is
subject to the following combined limitations for discharges from Outfalls OO1A and 001B in addition to
any limits specified in Conditions A.(1.)or A.(2.),and A.(3.)of this permit
PARAMETER EFFLUENT LIMITATIONS MONITORING REQUIREMENTS
Parameter Code Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Locations
See Conditions
Flow2 S0050 1.249 MGD A.(1.),A.(2.) Calculated Combined OOlA&
and A.(3.) 0016
Dissolved Oxygen 00300 Daily Average>_6.0 mg/L Daily Grab E
TP Load23 QS665 322 lb Seasonally Calculated Combined OOlA&
(April 1—October 31) 001B
Temperature,°C 00010 Monitor and Report Variable' Grab U and D
Dissolved Oxygen 00300 _ Monitor and Report Variable' Grab U and D
Fecal Coliform 31616 Monitor and Report Variable' Grab U and D
(geometric mean)
Conductivity 00094 Monitor and Report Variable' Grab U and D
Total Hardness[as 00900 Monitor and Report Quarterly Grab U
CaCO3],mg/L
Footnotes:
1. Sample locations: E=Effluent;U=Upstream at least 100 yards above the outfall;D=Downstream at
least 100 yards downstream from the outfall. Instream monitoring shall be conducted 3/Week during
June,July,August,and September,and once per week during the remainder of the year.Instream
monitoring is provisionally waived in light of the Permittee's participation in the Upper Cape Fear River
Basin Association.Instream monitoring shall be conducted as stated in this permit should the Permittee
end its participation in the Association.
2. Flow and TP Load Values at Combined Outfall CO1 are the sum of the corresponding values at Outfalls
OO1A and 001B.
3. Compliance with the nutrient limits shall be determined in accordance with Conditions A.(7.)of this
permit.
4. 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.
Page 12 of 25

NPDES Permit NC0020354
A.(6.) COMBINED LIMITATIONS-Outfall CO2 (Combined Outfalls 001A,001B and 002)
[15A NCAC 02B .0400 et seq.,02B .0500 et seq.]
Beginning upon the effective date of this permit and lasting until permit expiration,the Permittee is
subject to the following combined limitations for discharges from Outfalls 001A,001B and 002 in
addition to any limits specified in Conditions A.(1.) or A.(2.),A.(3.) and A.(4.)of this permit:
PARAMETER EFFLUENT LIMITATIONS MONITORING REQUIREMENTS
Parameter Code Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Locations
See Conditions
Flow 50050 3.22 MGD A.(1.),A.(2.), Calculated Combined 001A,
A.(3.)and 001E&002
A.(4.)
TP Delivered Load2 QY600 3,731 lb/yr Annually Calculated Combined 01A,
001E&00202
TN Delivered Load2 QY665 Monitor and Report Annually Calculated Combined 001A,
27,514 lb/yr 001E&002
Footnotes:
1. Values at Combined Outfall CO2 are the sum of the corresponding values at Outfalls OOIA,OOIB and 002.
2. Compliance with the nutrient limits shall be determined in accordance with Conditions A.(7.)and A.(8.)
of this permit.
Page 13 of 25

NPDES Permit NC0020354
A.(7.) NUTRIENT ALLOCATIONS
[T15A NCAC 02B .0270,2004 Robeson Creek TMDL]
(a.) The Town of Pittsboro is assigned Total Phosphorus (TP)and Total Nitrogen(TN) allocations for
its wastewater discharges, under the following authorities:
(i.) Robeson Creek Total Phosphorus TMDL,approved 1/13/2004.
(ii.) Jordan Lake TMDL,approved 9/20/2007 and incorporated into Jordan Lake Nutrient
Management Strategy-Wastewater Discharge Requirements, Rule 15A NCAC 02B .0270
(the"wastewater rule").
(b.) The Robeson Creek TMDL limits the discharge of Total Phosphorus from Pittsboro wastewater
facilities into Robeson Creek(Outfall 001) to 322 lb TP per summer season (April 1 -October 31).
(c.) The following tables list the allocations assigned to,acquired by, or transferred to and from the
Permittees in accordance with the Jordan Lake TMDL and wastewater rule and the status of each
as of permit issuance.These allocations are not enforceable limits nor do they supersede any TN
or TP limit specified elsewhere in this permit or in the NPDES permit of a compliance association
of which the Permittee is a Co-Permittee Member.
Total Nitrogen Allocation
ALLOCATION AMOUNT(1)
ALLOCATION CO-PERMITTEE SOURCE! STATUS
TYPE DATE Delivered Discharge(001)
(lb/yr) (Ib/yr)
Base Allocation Town of Pittsboro Footnote 2 27,514 36,202 Active
N/A Chatham Park WRC N/A 0 0 N/A
TOTAL 27,514 36,202 Active
Footnotes:
(1) Nitrogen Transport Factor=76%at Robeson Creek(Outfall 001),99%at Haw River(Outfall 002).
(2) Assigned in accordance with Rule 15A NCAC 02B.0270,effective 8/11/2009.
Total Phosphorus Allocation
ALLOCATION AMOUNT(1)
ALLOCATION CO-PERMITTEE SOURCE/ STATUS
TYPE DATE Delivered Discharge(001)
(lb/yr) (Ib/yr)
Base Town of Pittsboro Footnote 2 3,731 4,551 Active
N/A Chatham Park WRC N/A 0 0 N/A
TOTAL 3,731 4,551 Active
Footnotes:
(1) Phosphorus Transport Factor=82%at Robeson Creek(Outfall 001),99%at Haw River(Outfall 002).
(2) Assigned in accordance with Rule 15A NCAC 02B.0270,effective 8/11/2009.
(d.) Any addition,deletion,or modification of the listed allocation(s) (other than to correct
typographical errors) or any change in status of any of the listed allocations 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.
Page 14 of 25

NPDES Permit NC0020354
A.(8.)ANNUAL NUTRIENT LIMITS-Jordan Lake
[T15A NCAC 02B.0270]
(a.) Total Nitrogen(TN)and Total Phosphorus (FP)allocations and load limits established under the
Jordan Lake Nutrient Management Strategy for NPDES wastewater dischargers are annual values
and apply on a calendar year basis. (The provisions of this special condition are limited to these
annual limits and do not apply to seasonal limits established in the Robeson Creek TMDL.)
(b.) For any given calendar year,the Permittee shall be in compliance with the annual TN (or TP)
Load limit in this Permit if:
(i.) the Permittee's annual TN(or TP)Load is less than or equal to the effective limit,or
(ii.) the Permittee is a Co-Permittee Member of a compliance association.
(c.) The TN(or TP)Load limit in this Permit may be modified as the result of allowable changes in
the Permittee's allocations.
(i.) Allowable changes include those resulting from purchase of TN(or IT)allocation from an
authorized mitigation banker,the Division of Mitigation Services,or other source allowed
under applicable regulations;purchase,sale,trade,or lease of allocation between the
Permittee and other dischargers;regionalization;and other transactions approved by the
Division.
(ii.) The Permittee may request a modification of the TN(or TP)Load limit in this Permit to
reflect allowable changes in its allocation(s).
(A) Upon receipt of timely and proper application,the Division will modify the permit as
appropriate and in accordance with state and federal program requirements.
(B) Changes in TN(or TP)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.
(iii.) Any requests for modification should be sent to:
NCDEQ/ DWR/ NPDES Programs
Attn:Jordan Lake Watershed Coordinator
1617 Mail Service Center
Raleigh,NC 27699-1617
(d.) If the Permittee is a member and co-permittee of an approved compliance association on January
1 of a given year,its TN and TP discharges during that year are governed by that association's
group NPDES permit and the 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 and TP allocations will be updated annually and in
accordance with state and federal program requirements.
(iii.) If the Permittee intends to join or leave a compliance association,the Division must be
notified 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.
Page 15 of 25

NPDES Permit NC0020354
(e.) The TN and TP monitoring and reporting requirements in this Permit remain in effect throughout
the term of the Permit and are not affected by the Permittee's membership in a compliance
association.
A.(9.)CALCULATION AND REPORTING OF NUTRIENT LOADS
[G.S. 143-215.1(b)]
The Permittee shall calculate and report monthly and annual nutrient loads as follows:
(a.) Calculation of Discharge Loads(Outfalls OO1A,001E and 002): The Permittee shall calculate •
monthly and annual discharge loads for each outfall as follows:
(i.) Monthly Discharge Load(lb/mo,TN or TP) = 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 Discharge Load(lb/yr,TN or TP)=Sum of the 12 Monthly TN (or TP)Loads for the
calendar year
(b.) Calculation of Delivered Loads(Outfalls C01 and CO2): The Permittee shall calculate annual
delivered loads as follows:
(i.) Individual Outfalls 001A,001 B&002:
Annual Delivered Load (lb/yr,TN or TP)=Annual Discharge Load(lb/yr) x TF
where TF = Transport Factor for each outfall,as specified in Condition A.(5.),
Nutrient Allocations and Limits.
(h.) Combined Outfall C01:
Annual Delivered Load (lb/yr,TN or TP)=Sum of the Outfalls 001A&OOIB Annual
Delivered TN(or TP)Loads for the calendar year
(iii.) Combined Outfall CO2:
Annual Delivered Load(lb/yr,TN or TP)=Sum of the Outfalls OO1A,001E&002 Annual
Delivered TN(or TP)Loads for the calendar year
(c.) Reporting of Nutrient Discharges: The Permittee shall report monthly TN and TP discharge loads
for Outfalls 001 and 002 in the appropriate discharge monitoring report.
(d.) Reporting of Combined Delivered Loads: The Permittee shall:
(i.) report each calendar year's combined delivered TN and TP loads for Outfalls COI and CO2
with the December report for that year;
(ii.) report each summer season's combined TP loads for Outfall C01 (April 1 -October 31) with
the November report for that year;and
(iii.) if requested by the Division,provide a summary of its calculations for these loads.
Page 16 of 25

NPDES Permit NC0020354
A.(10.) CHRONIC TOXICITY PERMIT LIMITS (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 90%at Outfall 001A and 001B (Robeson
Creek) and 4%at Outfall 002(Haw River).
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 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 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:
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 email,[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 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.
Page 17 of 25

NPDES Permit NC0020354
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.
Page 18 of 25

NPDES Permit NC0020354
A.(11.) EFFLUENT POLLUTANT SCAN
[G.S.143-215.1(b)]
Upon expansion of design flow above 1.0 MGD,establishment of a pretreatment program,or connection to
the Big Buffalo WWTP, whichever happens first, the Permittee shall perform a total of three (3) Effluent
Pollutant Scans for all parameters listed below. Once this has occurred,the tests shall be performed in three
(3) consecutive years. 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-chioroethyl)ether 34273
Chlorine(total residual,TRC) 50060 1,1-dichloroethylene 34501 Bis(2-chloroisopropyl)ether 34283
Dissolved oxygen 00300 1,2dichloropropane 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 e'°-_,,,, 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
1 Cadmium 01027 1,1,2-trichloroethane 34511 1,3dichlorobenzene 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 2,4dimethylphenol 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
Acrolein 34210 Phenol 34694 Hexachloroethane 34396
Acrylonitrile 34215 2,4,6-trichlorophenol 34621 Indeno(1,2,3-cd)pyrene 34403
Benzene 34030 Base-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
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 31st of each designated sampling
year.
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NPDES Permit NC0020354
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
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,[e-mail].
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.
Page 20 of 25

NPDES Permit NC0020354
A.(12.) SCHEDULE OF COMPLIANCE FOR TOTAL COPPER,AMMONIA AND
NITRATE LIMITATIONS (OUTFALL 001A)
[G.S.143-215.1(b)1
1. Within 1 year of the effective date of the permit,the permittee shall submit to the Division of
Water Resources an Action Plan,for Division approval,summarizing the strategy or actions to
be taken to achieve compliance with the Total Copper,Nitrate and revised Ammonia
limitations listed in Section A.(2.).The plan will include specific dates for completion or
implementation of each action.The Action Plan may include dates for decommissioning of the
Pittsboro WWTP.
2. Within 2 years of the effective date of the permit, the permittee shall submit a report to the
Division summarizing actions taken in accordance with the Action Plan.
3. The permittee shall achieve compliance with Total Copper,Nitrate and revised Ammonia
limitations specified in Section A.(2.)within 3 years of the effective date of the 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(4) months will be subject to public notice.
The Action Plan and Reports shall include the owner's name,NPDES permit number and permittee
contact person,and shall be submitted to:
(1) NCDEQ/ Division of Water Resources (2) NCDEQ/ Division of Water Resources
NPDES Municipal Permitting Raleigh Regional Office
1617 Mail Service Center 3800 Barrett Drive
Raleigh,NC 27699-1617 Raleigh,NC 27609
A. (13.) 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.
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)l
The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic
Discharge Monitoring Report(eDMR) internet application.
Page 21 of 25

NPDES Permit NC0020354
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. 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
ATTENTION: 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.
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).
2. Electronic Submissions
In accordance with 40 CFR 122.41(l)(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:
Page 22 of 25

NPDES Permit NC0020354
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:
"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.lam aware that there are significant penalties for
submitting false information, including the possibility of fines and imprisonment for knowing violations."
Page 23 of 25

NPDES Permit NC0020354
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].
A. (14.) EFFLUENT SAMPLING CLARIFICATION
[G.S.143-215.1(b)]
Samples collected and measurements taken shall be representative of the permitted discharge.Samples
collected at a frequency less than daily shall be taken on a day and time that is representative of the
discharge for the period the sample represents.All samples shall be taken at the monitoring points
specified in this permit and,unless otherwise specified,before the effluent joins or is diluted by any
other wastestream,body of water,or substance. Monitoring points shall not be changed without
notification to and the approval of the Division.
Page 24 of 25

NPDES Permit NC0020354
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Outfall 002
Haw River
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i *Chatham Park Water Recovery Center_ (1[ f .jw
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Town of Pittsboro WWTP
Outfall 001A&001 B
Robeson Creek
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NC0020354 Town of Pittsboro WWTP and Chatham Park
Investors LLC Chatham Park Water Recovery Center
Receiving Streams Outfall 001A and 001 B-Robeson Creek;
Outfall 002-Haw River
Facility
Outfall 001A&001E1 Otttfall 002
Latitude: 35-42'48 35 43'50 Location
Longitude: 79°10'14", 79°06'23
uad#: E22NW,Pittsboro Sub-Basin:03-06-04 North Town of Pittsboro
Stream Class: WS-IV,NSW(both) 8-Digit HUC:03030002 Chatham County
Page 25 of 25