NC0020354_More Information (Received)_20190927

TOWN OF
CINDY PERRY NOR T``,, BOARD OF COMMISSIONERS
Mayor
Q' ' ' PAMELA BALDWIN
BRYAN GRUESBECK MICHAEL FIOCCO
Town Manager %�� �� JAY FARRELL
BETT FOLEY
PAUL S. MESSICK,JR
vpityr... (1) JOHN BONITZ
Town Attorney
TELEPHONE
P.O. Box 759—635 East Street [phone]
PITTSBORO, N.C. 27312 FAX[phone]
September 27, 2019
RECEIVED
Julie Grzyb OCT OB 2019
Division of Water Resources
512 North Salisbury St NCDEQ/DWR/NPDES
Raleigh, NC 27604
Dear Ms. Grzyb:
Pursuant to our recent meeting and follow up email conversations, attached is additional
relevant information requested and discussed:
• Previously-submitted 2016 NPDES permit renewal application
• Current updated NPDES permit renewal application
• An updated Chatham Park Decentralized Water Resource Recovery Facility(WRRF) Preliminary
Basis of Design Report (this is the report for the Old North State Water Company facility that will
provide treatment services for the Updated Pittsboro WWTP).
• The memorandum to DEQ from Elizabeth C. Goodson, P.E.,Town of Pittsboro Town Engineer,
Michael J. Myers, EnviroLink, Inc. and Old North State Water Company, LLC, and Timothy J.
Baldwin, P.E., McKim & Creed, Inc., consultant to Chatham Park Investors LLC(Request for
Verification of DEQ Approvals for Pittsboro Wastewater Management Projects and Operations)
that provides narrative, graphics, and attachments explaining:
o Background information
o Current operations
o Future operations
o Planned/proposed projects
o Permits/modifications obtained, required, or prospective
o Resolution of SCI mitigation
o Overall system configuration
o Regulatory basis for NPDES permit/permittee structure
('l IAR I ERFI) 1787

Please advise how we can assist in the expeditious processing of this NPDES permit renewal and
permits/authorizations associated with the Pittsboro-Sanford Conveyance project.
Sincerely,
Q, kkLC 0.11 .
Elizabeth Goodson P.E.,
Town Engineer, Town of Pittsboro
CC: Bryan Gruesbeck, Town of Pittsboro Manager
John Poteat, Town of Pittsboro Public Works & Utilities Director
Tim Baldwin, McKim & Creed (consultant for Chatham Park)
Michael Myers, EnviroLink, Inc and Old North State Water Company, LLC
Linda Culpepper, Director, Division of Water Resources
Jim Gregson, Deputy Director, Division of Water Resources
Kim Colson, Director, Division of Water Infrastructure
1003
CHARTERED 1787

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
TOWN OF PITTSBORO, NC Permit Renewal Cape Fear
FORM
2A NPDES FORM 2A APPLICATION OVERVIEW
NPDES
APPLICATION OVERVIEW
Form 2A has been developed in a modular format and consists of a "Basic Application Information" packet
and a "Supplemental Application Information" packet. The Basic Application Information packet is divided
into two parts. All applicants must complete Parts A and C. Applicants with a design flow greater than or
equal to 0.1 mgd must also complete Part B. Some applicants must also complete the Supplemental
Application Information packet. The following items explain which parts of Form 2A you must complete.
BASIC APPLICATION INFORMATION:
A. Basic Application Information for all Applicants. All applicants must complete questions A.1 through A.8. A treatment works
that discharges effluent to surface waters of the United States must also answer questions A.9 through A.12.
B. Additional Application Information for Applicants with a Design Flow z 0.1 mgd. All treatment works that have design flows
greater than or equal to 0.1 million gallons per day must complete questions B.1 through B.6.
C. Certification. All applicants must complete Part C(Certification).
SUPPLEMENTAL APPLICATION INFORMATION:
D. Expanded Effluent Testing Data. A treatment works that discharges effluent to surface waters of the United States and meets
one or more of the following criteria must complete Part D(Expanded Effluent Testing Data):
1. Has a design flow rate greater than or equal to 1 mgd,
2. Is required to have a pretreatment program(or has one in place),or
3. Is otherwise required by the permitting authority to provide the information.
E. Toxicity Testing Data. A treatment works that meets one or more of the following criteria must complete Part E(Toxicity Testing
Data):
1. Has a design flow rate greater than or equal to 1 mgd,
2. Is required to have a pretreatment program(or has one in place),or
3. Is otherwise required by the permitting authority to submit results of toxicity testing.
F. Industrial User Discharges and RCRA/CERCLA Wastes. A treatment works that accepts process wastewater from any
significant industrial users(Sills)or receives RCRA or CERCLA wastes must complete Part F(Industrial User Discharges
and RCRA/CERCLA Wastes). Sills are defined as:
1. All industrial users subject to Categorical Pretreatment Standards under 40 Code of Federal Regulations(CFR)403.6 and
40 CFR Chapter I, Subchapter N(see instructions);and
2. Any other industrial user that:
a. Discharges an average of 25,000 gallons per day or more of process wastewater to the treatment works(with certain
exclusions);or
b. Contributes a process waste stream that makes up 5 percent or more of the average dry weather hydraulic or organic
capacity of the treatment plant;or
c. Is designated as an SIU by the control authority.
G. Combined Sewer Systems. A treatment works that has a combined sewer system must complete Part G(Combined Sewer
Systems).
ALL APPLICANTS MUST COMPLETE PART C (CERTIFICATION)
RECEIVED
OCT 0 8 2019
NCDEQIDWRINPDES
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 1 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
TOWN OF PITTSBORO, NC Permit Renewal Cape Fear
BASIC APPLICATION INFORMATION
PART A. BASIC APPLICATION INFORMATION FOR ALL APPLICANTS:
All treatment works must complete questions A.1 through A.8 of this Basic Application Information Packet.
A.1. Facility Information.
Facility Name Town of Pittsboro,NC,NC0020354
Mailing Address P.O.Box 759
Pittsboro,NC 27312
Contact Person Bryan Gruesbeck
Title Town Manager
Telephone Number [phone]
Facility Address 485 Small St. Pittsboro,NC 27312.
(not P.O.Box) Small St Extension
A.2. Applicant Information. If the applicant is different from the above,provide the following:
Applicant Name
Mailing Address
Contact Person
Title
Telephone Number
Is the applicant the owner or operator(or both)of the treatment works?
® owner ® operator
Indicate whether correspondence regarding this permit should be directed to the facility or the applicant.
❑ facility ® applicant
A.3. Existing Environmental Permits. Provide the permit number of any existing environmental permits that have been issued to the treatment works
(include state-issued permits).
NPDES NC0020354 PSD
UIC Other WQ0024838Coniunctive Reclaimed Water
RCRA Other W00020019Land Application
A.4. Collection System Information. Provide information on municipalities and areas served by the facility. Provide the name and population of each
entity and,if known,provide information on the type of collection system(combined vs.separate)and its ownership(municipal,private,etc.).
Name Population Served Type of Collection System Ownership
Town of Pittsboro 4033 Gravity,Lift Station,FM,Separate Town of Pittsboro
Total population served 4033
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 2 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
TOWN OF PITTSBORO, NC Major Modification Cape Fear
A.5. Indian Country.(existing)
a. Is the treatment works located in Indian Country?
❑ Yes ® No
b. Does the treatment works discharge to a receiving water that is either in Indian Country or that is upstream from(and eventually flows
through)Indian Country?
❑ Yes ® No
A.6. Flow. Indicate the design flow rate of the treatment plant(i.e.,the wastewater flow rate that the plant was built to handle). Also provide the
average daily flow rate and maximum daily flow rate for each of the last three years. Each year's data must be based on a 12-month time period
with the 12th month of"this year"occurring no more than three months prior to this application submittal.
a. Design flow rate 0.75 mgd(outran 001 Robeson Creek Proposed)(permitted flow rate:1.249 MGD)
Two Years Ago Last Year This Year
b. Annual average daily flow rate .327 MGD/2013 .382/2014 .412 MGD/2015
c. Maximum daily flow rate 1.382 MGD 1.15 MGD 1.320 MGD
A.7. Collection System. Indicate the type(s)of collection system(s)used by the treatment plant. Check all that apply. Also estimate the percent
contribution(by miles)of each.(existing)
• Separate sanitary sewer 100
❑ Combined storm and sanitary sewer
A.8. Discharges and Other Disposal Methods.(existing)
a. Does the treatment works discharge effluent to waters of the U.S.? ® Yes ❑ No
If yes,list how many of each of the following types of discharge points the treatment works uses:
i. Discharges of treated effluent 1
ii. Discharges of untreated or partially treated effluent 0
iii. Combined sewer overflow points 0
iv. Constructed emergency overflows(prior to the headworks) 0
v. Other 0 0
b. Does the treatment works discharge effluent to basins,ponds,or other surface impoundments
that do not have outlets for discharge to waters of the U.S.?(existing) ❑ Yes ® No
If yes,provide the following for each surface impoundment:
Location: n/a
Annual average daily volume discharge to surface impoundment(s) 0 mgd
Is discharge ❑ continuous or ❑ intermittent?
c. Does the treatment works land-apply treated wastewater?(existing) ❑ Yes 181 No
If yes,provide the following for each land application site:
Location:
Number of acres:
Annual average daily volume applied to site: mgd
Is land application 0 continuous or ❑ intermittent?
d. Does the treatment works discharge or transport treated or untreated wastewater to another
treatment works(existing)? ❑ Yes ® No
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 3 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
TOWN OF PITTSBORO, NC Permit Renewal Cape Fear
A.5. Indian Country.(new)
c. Is the treatment works located in Indian Country?
❑ Yes ® No
d. Does the treatment works discharge to a receiving water that is either in Indian Country or that is upstream from(and eventually flows
through)Indian Country?
❑ Yes ® No
A.6. Flow. Indicate the design flow rate of the treatment plant(i.e.,the wastewater flow rate that the plant was built to handle). Also provide the
average daily flow rate and maximum daily flow rate for each of the last three years. Each year's data must be based on a 12-month time period
with the 121h month of"this year"occurring no more than three months prior to this application submittal.
a. Design flow rate 1.97 mgd(Outfall 002 Haw River,Proposed)(permitted flow rate 1.97 mgd)
Two Years Aqo Last Year This Year
b. Annual average daily flow rate N/A N/A N/A
c. Maximum daily flow rate N/A N/A N/A
A.7. Collection System. Indicate the type(s)of collection system(s)used by the treatment plant. Check all that apply. Also estimate the percent
contribution(by miles)of each.
® Separate sanitary sewer 100
❑ Combined storm and sanitary sewer
A.8. Discharges and Other Disposal Methods.(new)
a. Does the treatment works discharge effluent to waters of the U.S.? ® Yes ❑ No
If yes,list how many of each of the following types of discharge points the treatment works uses:
vi. Discharges of treated effluent 1
vii. Discharges of untreated or partially treated effluent 0
viii. Combined sewer overflow points 0
ix. Constructed emergency overflows(prior to the headworks) 0
x. Other 0 0
b. Does the treatment works discharge effluent to basins,ponds,or other surface impoundments
that do not have outlets for discharge to waters of the U.S. (new)? ❑ Yes ® No
If yes,provide the following for each surface impoundment:
Location: n/a
Annual average daily volume discharge to surface impoundment(s)(new) 0 mgd
Is discharge ❑ continuous or ❑ intermittent?
c. Does the treatment works land-apply treated wastewater?(new) ❑ Yes ® No
If yes,provide the following for each land application site:
Location: N/A
Number of acres: N/A
Annual average daily volume applied to site: N/A mgd
Is land application ❑ continuous or ® intermittent?
d. Does the treatment works discharge or transport treated or untreated wastewater to another
treatment works?(new) ❑ Yes ® No
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 4 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
TOWN OF PITTSBORO, NC Permit Renewal Cape Fear
If yes,describe the mean(s)by which the wastewater from the treatment works is discharged or transported to the other treatment works
(e.g.,tank truck,pipe).
If transport is by a party other than the applicant,provide:
Transporter Name
Mailing Address
Contact Person
Title
Telephone Number ( )
For each treatment works that receives this discharge,provide the following:
Name
Mailing Address
Contact Person
Title
Telephone Number (
If known,provide the NPDES permit number of the treatment works that receives this discharge
Provide the average daily flow rate from the treatment works into the receiving facility. mgd
e. Does the treatment works discharge or dispose of its wastewater in a manner not included
in A.S.through A.8.d above(e.g.,underground percolation,well injection): ❑ Yes ❑ No
If yes,provide the following for each disposal method:
Description of method(including location and size of site(s)if applicable):
Annual daily volume disposed by this method:
Is disposal through this method ❑ continuous or ❑ intermittent?
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 5 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
TOWN OF PITTSBORO, NC Permit Renewal Cape Fear
WASTEWATER DISCHARGES:
If you answered"Yes"to question A.8.a,complete questions A.9 through A.12 once for each outfall(including bypass points)through
which effluent is discharged. Do not include information on combined sewer overflows in this section. If you answered"No"to question
A.8.a,go to Part B,"Additional Application Information for Applicants with a Design Flow Greater than or Equal to 0.1 mgd."
A.9. Description of Outfall.
a. Outfall number 001 (EXISTING)
b. Location Robeson Creek WWTP Small Street Extension Pittsboro,NC
(City or town,if applicable) (Zip Code)
Chatham North Carolina
(County) (State)
35-42-47.99 N 79-10-13.51 W
(Latitude) (Longitude)
c. Distance from shore(if applicable) 0 ft.
d. Depth below surface(if applicable) n/a ft.
e. Average daily flow rate 0.412 mgd
f. Does this outfall have either an intermittent or a periodic discharge? ❑ Yes ® No (go to A.9.g.)
If yes,provide the following information:
Number f times per year discharge occurs:
Average duration of each discharge:
Average flow per discharge: mgd
Months in which discharge occurs:
g. Is outfall equipped with a diffuser? 0 Yes ® No
A.10. Description of Receiving Waters.
a. Name of receiving water Robeson Creek
b. Name of watershed(if known) Cape Fear
United States Soil Conservation Service 14-digit watershed code(if known):
c. Name of State Management/River Basin(if known):Cape Fear
United States Geological Survey 8-digit hydrologic cataloging unit code(if known):
d. Critical low flow of receiving stream(if applicable)
acute 0 cfs chronic 0 cfs
e. Total hardness of receiving stream at critical low flow(if applicable): mg/I of CaCO3
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 6 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
TOWN OF PITTSBORO, NC Permit Renewal Cape Fear
WASTEWATER DISCHARGES:
If you answered"Yes"to question A.8.a,complete questions A.9 through A.12 once for each outfall(including bypass points)through
which effluent is discharged. Do not include information on combined sewer overflows in this section. If you answered"No"to question
A.8.a,go to Part B,"Additional Application Information for Applicants with a Design Flow Greater than or Equal to 0.1 mgd."
A.9. Description of Outfall.
c. Outfall number 002 (TO BE BUILT)
d. Location At US Hwy 64 Bridge crossing Haw River on the Western most shore
(City or town,if applicable) (Zip Code)
Chatham North Carolina
(County) (State)
35-43-49.49 N 79-06-23.25
(Latitude) (Longitude)
c. Distance from shore(if applicable) -30 ft.
d. Depth below surface(if applicable) n/a ft.
e. Average daily flow rate 1.97 mgd
f. Does this outfall have either an intermittent or a periodic discharge? ❑ Yes ® No (go to A.9.g.)
If yes,provide the following information:
Number f times per year discharge occurs:
Average duration of each discharge:
Average flow per discharge: mgd
Months in which discharge occurs:
g. Is outfall equipped with a diffuser? ❑ Yes ® No
A.10. Description of Receiving Waters.
d. Name of receiving water Haw River
e. Name of watershed(if known) Cape Fear
United States Soil Conservation Service 14-digit watershed code(if known):
f. Name of State Management/River Basin(if known):
United States Geological Survey 8-digit hydrologic cataloging unit code(if known):
d. Critical low flow of receiving stream(if applicable)
acute 0 cfs chronic 0 cfs
e. Total hardness of receiving stream at critical low flow(if applicable): 30 mg/I of CaCO3
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 7 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
TOWN OF PITTSBORO, NC Permit Renewal Cape Fear
A.11. Description of Treatment
a What level of treatment are provided? Check all that apply
❑ Primary ® Secondary
❑ Advanced ® Other. Describe: tertiary sand filters,UV
b. Indicate the following removal rates(as applicable):
Design BOD5 removal or Design CBOD5 removal 85
Design SS removal 85
Design P removal Monitor and Report
Design N removal Monitor and Report_ °A)
Other
c. What type of disinfection is used for the effluent from this outfall? If disinfection varies by season,please describe:
UV
If disinfection is by chlorination is dechlorination used for this outfall? ❑ Yes ® No
Does the treatment plant have post aeration? ® Yes ❑ No
A.12. Effluent Testing Information. All Applicants that discharge to waters of the US must provide effluent testing data for the following
parameters. Provide the indicated effluent testing required by the permitting authority for each outfall through which effluent is
discharged. Do not include information on combined sewer overflows in this section. All information reported must be based on data
collected through analysis conducted using 40 CFR Part 136 methods. In addition,this data must comply with QA/QC requirements of
40 CFR Part 136 and other appropriate QA/QC requirements for standard methods for analytes not addressed by 40 CFR Part 136. At a
minimum,effluent testing data must be based on at least three samples and must be no more than four and one-half years apart.
Outfall number: 001
MAXIMUM DAILY VALUE AVERAGE DAILY VALUE
PARAMETER
Value Units Value Units Number of Samples
pH(Maximum) 9.0 s.u. ������ �
Flow Rate 0.75 MGD 0.373 MGD 365(Daily)
Temperature(Winter) 10.9 Degrees C 15.0 Degrees C 260(5/week)
Temperature(Summer) 26.4 Degrees C 25.0 Degrees C 260(5/week)
*For pH please report a minimum and a maximum daily value
MAXIMUM DAILY AVERAGE DAILY DISCHARGE
POLLUTANT DISCHARGE ANALYTICAL ML/MDL
Number of METHOD
Conc. Units Conc. Units Samples
CONVENTIONAL AND NON CONVENTIONAL COMPOUNDS
BIOCHEMICAL OXYGEN BOD5 5.0 Mg/I 2.5 Mg/1 156 SM 5210B 300
DEMAND(Report one) (3/week)
CBOD5
FECAL COLIFORM 200 #/100 ML 14 #/100 156 SM 9222 D
ML (3/week)
156
TOTAL SUSPENDED SOLIDS(TSS) 30.0 Mg/I 2.5 Mg/I (3/week) SM 2540 D
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 8 of 22

END OF PART A.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
TOWN OF PITTSBORO, NC Permit Renewal Cape Fear
A.11. Description of Treatment
a What level of treatment are provided? Check all that apply(Future Outfall 002)
❑ Primary ❑ Secondary
❑ Advanced ❑ Other. Describe:
d. Indicate the following removal rates(as applicable):(see Speculative Limits)
Design BOD5 removal or Design CBOD5 removal 99(to achieve spec limits)
Design SS removal 90(to achieve spec limits)
Design P removal 97(to achieve spec limits) %
Design N removal 89(to achieve spec limits)
Other
e. What type of disinfection is used for the effluent from this outfall? If disinfection varies by season,please describe:
If disinfection is by chlorination is dechlorination used for this outfall? ❑ Yes ❑ No
Does the treatment plant have post aeration? ❑ Yes ❑ No
A.12. Effluent Testing Information. All Applicants that discharge to waters of the US must provide effluent testing data for the following
parameters. Provide the indicated effluent testing required by the permitting authority for each outfall through which effluent is
discharged. Do not include information on combined sewer overflows in this section. All information reported must be based on data
collected through analysis conducted using 40 CFR Part 136 methods. In addition,this data must comply with QA/QC requirements of
40 CFR Part 136 and other appropriate QA/QC requirements for standard methods for analytes not addressed by 40 CFR Part 136. At a
minimum,effluent testing data must be based on at least three samples and must be no more than four and one-half years apart.
Outfall number
MAXIMUM DAILY VALUE AVERAGE DAILY VALUE
PARAMETER
Value Units Value Units Number of Samples
pH(Minimum) s.u. ��///////,
pH(Maximum) s.u.
Flow Rate
Temperature(Winter)MIN
Temperature(Summer)MAX
For pH please report a minimum and a maximum daily value
MAXIMUM DAILY AVERAGE DAILY DISCHARGE
DISCHARGE ANALYTICAL
POLLUTANT METHOD ML/MDL
Conc. Units Conc. Units Number of
Samples
CONVENTIONAL AND NON CONVENTIONAL COMPOUNDS
BIOCHEMICAL OXYGEN BOD5
DEMAND(Report one) CBOD5
FECAL COLIFORM
TOTAL SUSPENDED SOLIDS(TSS)
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 9 of 22

END OF PART A.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 10 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
TOWN OF PITTSBORO, NC Permit Renewal Cape Fear
BASIC APPLICATION INFORMATION
PART B. ADDITIONAL APPLICATION INFORMATION FOR APPLICANTS WITH A DESIGN FLOW GREATER THAN OR
EQUAL TO 0.1 MGD (100,000 gallons per day).
All applicants with a design flow rate>_0.1 mgd must answer questions B.1 through B.6. All others go to Part C(Certification).
B.1. Inflow and Infiltration. Estimate the average number of gallons per day that flow into the treatment works from inflow and/or infiltration.
147,583 gpd(Discussion in Exhibit G-0 of EIS)
Briefly explain any steps underway or planned to minimize inflow and infiltration.
The Town of Pittsboro has an extensive ongoing I/I program to reduce the storm flow.The repairs and replacements
began in 2002 and continue today and have paid off in reducing the non-wastewater flows. Stimulus money
applications as well as other grants and loans are consistently applied for in hopes of getting further financial
assistance to increase the scope of work that is required for system rehabilitation.
B.2. Topographic Map. Attach to this application a topographic map of the area extending at least one mile beyond facility property boundaries. This
map must show the outline of the facility and the following information. (You may submit more than one map if one map does not show the entire
area.)
a. The area surrounding the treatment plant,including all unit processes.
b. The major pipes or other structures through which wastewater enters the treatment works and the pipes or other structures through which
treated wastewater is discharged from the treatment plant. Include outfalls from bypass piping,if applicable.(See Attached Schematic 1)
c. Each well where wastewater from the treatment plant is injected underground
d. Wells,springs,other surface water bodies,and drinking water wells that are: 1)within'/4 mile of the property boundaries of the treatment
works,and 2)listed in public record or otherwise known to the applicant.
e. Any areas where the sewage sludge produced by the treatment works is stored,treated,or disposed.
f. If the treatment works receives waste that is classified as hazardous under the Resource Conservation and Recovery Act(RCRA)by truck,rail,
or special pipe,show on the map where the hazardous waste enters the treatment works and where it is treated,stored,and/or disposed.
B.3. Process Flow Diagram or Schematic. Provide a diagram showing the processes of the treatment plant,including all bypass piping and all
backup power sources or redundancy in the system. Also provide a water balance showing all treatment units,including disinfection(e.g.,
chlorination and de-chlorination). The water balance must show daily average flow rates at influent and discharge points and approximate daily
flow rates between treatment units. Include a brief narrative description of the diagram.
B.4. Operation/Maintenance Performed by Contractor(s).
Are any operational or maintenance aspects(related to wastewater treatment and effluent quality)of the treatment works the responsibility of a
contractor? ❑ Yes ® No
If yes,list the name,address,telephone number,and status of each contractor and describe the contractor's responsibilities(attach additional
pages if necessary).
Name:
Mailing Address:
Telephone Number: � Z
Responsibilities of Contractor:
B.5. Scheduled improvements and Schedules of Implementation. Provide information on any uncompleted implementation schedule or
uncompleted plans for improvements that will affect the wastewater treatment,effluent quality,or design capacity of the treatment works. If the
treatment works has several different implementation schedules or is planning several improvements,submit separate responses to question B.5
for each. (If none,go to question B.6)
a. List the outfall number(assigned in question A.9)for each outfall that is covered by this implementation schedule.
001, 002
b. Indicate whether the planned improvements or implementation schedule are required by local,State,or Federal agencies.
❑ Yes ® No
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 11 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
TOWN OF PITTSBORO, NC Permit Renewal Cape Fear
c. If the answer to B.5.b is"Yes,"briefly describe,including new maximum daily inflow rate(if applicable).
d. Provide dates imposed by any compliance schedule or any actual dates of completion for the implementation steps listed below,as
applicable. For improvements planned independently of local,State,or Federal agencies,indicate planned or actual completion dates,as
applicable. Indicate dates as accurately as possible.
Schedule Actual Completion
Implementation Stage MM/DD/YYYY MM/DD/YYYY
-Begin Construction / / / /
-End Construction / / / /
-Begin Discharge / / / /
-Attain Operational Level / / / /
e. Have appropriate permits/clearances concerning other Federal/State requirements been obtained? ® Yes ❑ No
Describe briefly: Record of decision for the protect was issued on March 29,2010
B.6. EFFLUENT TESTING DATA(GREATER THAN 0.1 MGD ONLY).
Applicants that discharge to waters of the US must provide effluent testing data for the following parameters. Provide the indicated
effluent testing required by the permitting authority for each outfall through which effluent is discharged. Do not include information
on combine sewer overflows in this section. All information reported must be based on data collected through analysis conducted
using 40 CFR Part 136 methods. In addition,this data must comply with QA/QC requirements of 40 CFR Part 136 and other appropriate
QA/QC requirements for standard methods for analytes not addressed by 40 CFR Part 136. At a minimum effluent testing data must be
based on at least three pollutant scans and must be no more than four and on-half years old.
Outfall Number: 001
MAXIMUM DAILY AVERAGE DAILY DISCHARGE
DISCHARGE ANALYTICAL
POLLUTANT METHOD ML/MDL
Conc. Units Conc. Units Number of
Samples
CONVENTIONAL AND NON CONVENTIONAL COMPOUNDS
AMMONIA(as N) 2.0 mg/I <0.1 Mg/I 3/week
CHLORINE(TOTAL n/a
RESIDUAL,TRC)
DISSOLVED OXYGEN >6.0 mg/I >6.0 mg/I Daily
TOTAL KJELDAHL Monitor&
NITROGEN(TKN) Report
NITRATE PLUS NITRITE Monitor&
NITROGEN Report
OIL and GREASE n/a
2.0
PHOSPHORUS(Total) Quarterly mg/I <2.0 mg/I weekly
Avg.
TOTAL DISSOLVED SOLIDS n/a
(TDS)
OTHER TP Load 322 lbs.April- <322 lbs. weekly
Oct.
END OF PART B.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 12 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
TOWN OF PITTSBORO, NC Permit Renewal Cape Fear
BASIC APPLICATION INFORMATION
PART C. CERTIFICATION
All applicants must complete the Certification Section. Refer to instructions to determine who is an officer for the purposes of this
certification. All applicants must complete all applicable sections of Form 2A,as explained in the Application Overview. Indicate below which
parts of Form 2A you have completed and are submitting. By signing this certification statement,applicants confirm that they have reviewed
Form 2A and have completed all sections that apply to the facility for which this application is submitted.
Indicate which parts of Form 2A you have completed and are submitting:
❑ Basic Application Information packet Supplemental Application Information packet:
❑ Part D(Expanded Effluent Testing Data)
❑ Part E(Toxicity Testing: Bio monitoring Data)
O Part F(Industrial User Discharges and RCRA/CERCLA Wastes)
O Part G(Combined Sewer Systems)
ALL APPLICANTS MUST COMPLETE THE FOLLOWING CERTIFICATION.
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 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 fine and imprisonment
for knowing violations.
Name and official title
Signature
Telephone number
Date signed
Upon request of the permitting authority,you must submit any other information necessary to assure wastewater treatment practices at the treatment
works or identify appropriate permitting requirements.
SEND COMPLETED FORMS TO:
NCDENR/ DWQ
Attn: NPDES Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 13 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
SUPPLEMENTAL APPLICATION INFORMATION
PART D. EXPANDED EFFLUENT TESTING DATA
Refer to the directions on the cover page to determine whether this section applies to the treatment works.
Effluent Testing: 1.0 mgd and Pretreatment Works. If the treatment works has a design flow greater than or equal to 1.0 mgd or it has(or is required
to have)a pretreatment program,or is otherwise required by the permitting authority to provide the data,then provide effluent testing data for the following
pollutants. Provide the indicated effluent testing information and any other information required by the permitting authority for each outfall through which
effluent is discharged. Do not include information on combined sewer overflows in this section. All information reported must be based on data collected
through analyses conducted using 40 CFR Part 136 methods. In addition,these data must comply with QA/QC requirements of 40 CFR Part 136 and
other appropriate QA/QC requirements for standard methods for analytes not addressed by 40 CFR Part 136. Indicate in the blank rows provided below
any data you may have on pollutants not specifically listed in this form. At a minimum,effluent testing data must be based on at least three pollutant
scans and must be no more than four and one-half years old.
Outfall number: 001 is currently<1.0 MGD (Complete once for each outfall discharging effluent to waters of the United States.)
MAXIMUM DAILY DISCHARGE AVERAGE DAILY DISCHARGE
POLLUTANT Number ANALYTICAL ML/MDL
Conc. Units Mass Units Conc. Units Mass Units of METHOD
Samples
METALS(TOTAL RECOVERABLE),CYANIDE,PHENOLS,AND HARDNESS.
ANTIMONY99999999
ARSENIC
BERYLLIUM
CADMIUM
CHROMIUM
COPPER
LEAD
MERCURY
NICKEL
SELENIUM
SILVER
THALLIUM
ZINC
CYANIDE
TOTAL PHENOLIC
COMPOUNDS
HARDNESS(as CaCO3)
Use this space(or a separate sheet)to provide information on other metals requested by the permit writer
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 14 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Outfall number: (Complete once for each outfall discharging effluent to waters of the United States.)
MAXIMUM DAILY DISCHARGE AVERAGE DAILY DISCHARGE
POLLUTANT Number ANALYTICAL ML/MDL
Conc. Units Mass Units Conc. Units Mass Units of METHOD
Samples
VOLATILE ORGANIC COMPOUNDS
ACROLEIN
ACRYLONITRILE
BENZENE
BROMOFORM
CARBON
TETRACHLORIDE
CHLOROBENZENE
CHLORODIBROMO-
METHANE
CHLOROETHANE
2-CHLOROETHYLVINYL
ETHER
CHLOROFORM
DICHLOROBROMO-
METHANE
1,1-DICHLOROETHANE
1,2-DICHLOROETHANE
TRANS-I,2-DICHLORO-
ETHYLENE
1,1-DICHLORO-
ETHYLENE
1,2-DICHLOROPROPANE
1,3-DICHLORO-
PROPYLENE
ETHYLBENZENE
METHYL BROMIDE
METHYL CHLORIDE
METHYLENE CHLORIDE
1,1,2,2-TETRA-
CHLOROETHANE
TETRACHLORO-
ETHYLENE
TOLUENE
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 15 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Outfall number: (Complete once for each outfall discharging effluent to waters of the United States.)
MAXIMUM DAILY DISCHARGE AVERAGE DAILY DISCHARGE
POLLUTANT Number ANALYTICAL ML/MDL
Conc. Units Mass Units Conc. Units Mass Units of METHOD
Samples
1,1,1-
TRICHLOROETHANE
1,1,2-
TRICHLOROETHANE
TRICHLOROETHYLENE
VINYL CHLORIDE
Use this space(or a separate sheet)to provide information on other volatile organic compounds requested by the permit writer
ACID-EXTRACTABLE COMPOUNDS
P-CHLORO-M-CRESOL
2-CHLOROPHENOL
2,4-DICHLOROPHENOL
2,4-DIMETHYLPHENOL
4,6-D I N IT RO-O-CRESOL
2,4-DINITROPHENOL
2-NITROPHENOL
4-NITROPHENOL
PENTACHLOROPHENOL
PHENOL
2,4,6-
TRICHLOROPHENOL
Use this space(or a separate sheet)to provide information on other acid-extractable compounds requested by the permit writer
BASE-NEUTRAL COMPOUNDS
ACENAPHTHENE
ACENAPHTHYLENE
ANTHRACENE
BENZIDINE
BENZO(A)ANTHRACENE
BENZO(A)PYRENE
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 16 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Outfall number: (Complete once for each outfall discharging effluent to waters of the United States.)
MAXIMUM DAILY DISCHARGE AVERAGE DAILY DISCHARGE
POLLUTANT Number ANALYTICAL ML/MDL
Conc. Units Mass Units Conc. Units Mass Units of METHOD
Samples
3,4 BENZO-
FLUORANTHENE
BENZO(GHI)PERYLENE
BENZO(K)
FLUORANTHENE
BIS(2-CHLOROETHOXY)
METHANE
BIS(2-CHLOROETHYL)-
ETHER
BIS(2-CHLOROISO-
PROPYL)ETHER
BIS(2-ETHYLHEXYL)
PHTHALATE
4-BROMOPHENYL
PHENYL ETHER
BUTYL BENZYL
PHTHALATE
2-CHLORO-
NAPHTHALENE
4-CHLORPHENYL
PHENYL ETHER
CHRYSENE
DI-N-BUTYL PHTHALATE
DI-N-OCTYL PHTHALATE
DIBENZO(A,H)
ANTHRACENE
1,2-DICHLOROBENZENE
1,3-DICHLOROBENZENE
1,4-DICHLOROBENZENE
3,3-DICHLORO-
BENZIDINE
DIETHYL PHTHALATE
DIMETHYL PHTHALATE
2,4-DINITROTOLUENE
2,6-DINITROTOLUENE
1,2-DIPHENYL-
HYDRAZINE
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 17 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Outfall number: (Complete once for each outfall discharging effluent to waters of the United States.)
MAXIMUM DAILY DISCHARGE AVERAGE DAILY DISCHARGE
POLLUTANT Number ANALYTICAL ML/MDL
Conc. Units Mass Units Conc. Units Mass Units of METHOD
Samples
FLUORANTHENE
FLUORENE
HEXACHLOROBENZENE
HEXACHLORO-
BUTADIENE
HEXACHLOROCYCLO-
PENTADIENE
HEXACHLOROETHANE
INDENO(1,2,3-CD)
PYRENE
ISOPHORONE
NAPHTHALENE
NITROBENZENE
N-NITROSODI-N-
PROPYLAMINE
N-NITROSODI-
METHYLAMINE
N-N ITROSOD I-
PHENYLAMINE
PHENANTHRENE
PYRENE
1,2,4-
TRICHLOROBENZENE
Use this space(or a separate sheet)to provide information on other base-neutral compounds requested by the permit writer
Use this space(or a separate sheet)to provide information on other pollutants(e.g.,pesticides)requested by the permit writer
END OF PART D.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 18 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
SUPPLEMENTAL APPLICATION INFORMATION
PART E. TOXICITY TESTING DATA
POTWs meeting one or more of the following criteria must provide the results of whole effluent toxicity tests for acute or chronic toxicity for each of the
facility's discharge points: 1)POTWs with a design flow rate greater than or equal to 1.0 mgd;2)POTWs with a pretreatment program(or those that are
required to have one under 40 CFR Part 403);or 3)POTWs required by the permitting authority to submit data for these parameters.
• At a minimum,these results must include quarterly testing for a 12-month period within the past 1 year using multiple species(minimum of two
species),or the results from four tests performed at least annually in the four and one-half years prior to the application,provided the results
show no appreciable toxicity,and testing for acute and/or chronic toxicity,depending on the range of receiving water dilution. Do not include
information on combined sewer overflows in this section. All information reported must be based on data collected through analysis conducted
using 40 CFR Part 136 methods. In addition,this data must comply with QA/QC requirements of 40 CFR Part 136 and other appropriate QA/QC
requirements for standard methods for analytes not addressed by 40 CFR Part 136.
• In addition,submit the results of any other whole effluent toxicity tests from the past four and one-half years. If a whole effluent toxicity test
conducted during the past four and one-half years revealed toxicity,provide any information on the cause of the toxicity or any results of a
toxicity reduction evaluation,if one was conducted.
• If you have already submitted any of the information requested in Part E,you need not submit it again. Rather,provide the information
requested in question E.4 for previously submitted information. If EPA methods were not used,report the reasons for using altemate methods.
If test summaries are available that contain all of the information requested below,they may be submitted in place of Part E.
If no biomonitoring data is required,do not complete Part E. Refer to the Application Overview for directions on which other sections of the form to
complete.
E.1. Required Tests.
Indicate the number of whole effluent toxicity tests conducted in the past four and one-hall years.
❑chronic ❑ acute
E.2. Individual Test Data. Complete the following chart for each whole effluent toxicity test conducted in the last four and one-half years. Allow one
column per test(where each species constitutes a test). Copy this page if more than three tests are being reported.
Test number: Test number: Test number:
a. Test information.
Test Species&test method number
Age at initiation of test
Outfall number
Dates sample collected
Date test started
Duration
b. Give toxicity test methods followed.
Manual title
Edition number and year of publication
Page number(s)
c. Give the sample collection method(s)used. For multiple grab samples,indicate the number of grab samples used.
24-Hour composite
Grab
d. Indicate where the sample was taken in relation to disinfection. (Check all that apply for each.
Before disinfection
After disinfection
After dechlorination
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 19 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Test number: Test number: Test number:
e. Describe the point in the treatment process at which the sample was collected.
Sample was collected:
f. For each test,include whether the test was intended to assess chronic toxicity,acute toxicity,or both
Chronic toxicity
Acute toxicity
g. Provide the type of test performed.
Static
Static-renewal
Flow-through
h. Source of dilution water. If laboratory water,specify type;if receiving water,specify source.
Laboratory water
Receiving water
i. Type of dilution water. If salt water,specify"natural"or type of artificial sea salts or brine used.
Fresh water
Salt water
j. Give the percentage effluent used for all concentrations in the test series.
k. Parameters measured during the test. (State whether parameter meets test method specifications)
pH
Salinity
Temperature
Ammonia
Dissolved oxygen
I. Test Results.
Acute:
Percent survival in 100%
effluent
LC50
95%C.I.
Control percent survival
Other(describe)
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 20 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Chronic:
NOEC
IC25 % % %
Control percent survival
Other(describe)
m. Quality Control/Quality Assurance.
Is reference toxicant data available?
Was reference toxicant test within
acceptable bounds?
What date was reference toxicant test
run(MM/DD/YYYY)?
Other(describe)
E.3. Toxicity Reduction Evaluation. Is the treatment works involved in a Toxicity Reduction Evaluation?
❑ Yes ❑ No If yes,describe:
E.4. Summary of Submitted Biomonitoring Test Information. If you have submitted biomonitoring test information,or information regarding the
cause of toxicity,within the past four and one-half years,provide the dates the information was submitted to the permitting authority and a summary
of the results.
Date submitted: / / (MM/DD/YYYY)
Summary of results: (see instructions)
END OF PART E.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE.
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 2 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
SUPPLEMENTAL APPLICATION INFORMATION
PART F.INDUSTRIAL USER DISCHARGES AND RCRA/CERCLA WASTES
All treatment works receiving discharges from significant industrial users or which receive RCRA,CERCLA,or other remedial wastes must
complete part F.
GENERAL INFORMATION:
F.1. Pretreatment program. Does the treatment works have,or is subject ot,an approved pretreatment program?
❑ Yes ® No
F.2. Number of Significant Industrial Users(SIUs)and Categorical Industrial Users(CIUs). Provide the number of each of the following types of
industrial users that discharge to the treatment works.
a. Number of non-categorical SIUs.
b. Number of ClUs.
SIGNIFICANT INDUSTRIAL USER INFORMATION:
Supply the following information for each SIU. If more than one SIU discharges to the treatment works,copy questions F.3 through F.8 and
provide the information requested for each SIU.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: N/A
Mailing Address:
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
F.5. Principal Product(s)and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s):
Raw material(s):
F.6. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day(gpd)and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
b. Non-process wastewater flow rate. Indicate the average daily volume of non-process wastewater flow discharged into the collection system
in gallons per day(gpd)and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits 0 Yes ❑ No
b. Categorical pretreatment standards ❑ Yes 0 No
If subject to categorical pretreatment standards,which category and subcategory?
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 22 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems(e.g.,
upsets,interference)at the treatment works in the past three years?
❑ Yes ❑ No If yes,describe each episode.
RCRA HAZARDOUS WASTE RECEIVED BY TRUCK, RAIL,OR DEDICATED PIPELINE:
F.9. RCRA Waste. Does the treatment works receive or has it in the past three years received RCRA hazardous waste by truck,rail or dedicated pipe?
O Yes 0 No(go to F.12)
F.10. Waste transport. Method by which RCRA waste is received(check all that apply):
0 Truck ❑ Rail ❑ Dedicated Pipe
F.11. Waste Description. Give EPA hazardous waste number and amount(volume or mass,specify units).
EPA Hazardous Waste Number Amount Units
CERCLA(SUPERFUND)WASTEWATER, RCRA REMEDIATION/CORRECTIVE ACTION
WASTEWATER, AND OTHER REMEDIAL ACTIVITY WASTEWATER:
F.12. Remediation Waste. Does the treatment works currently(or has it been notified that it will)receive waste from remedial activities?
❑ Yes(complete F.13 through F.15.) ❑ No
F.13. Waste Origin. Describe the site and type of facility at which the CERCLA/RCRA/or other remedial waste originates(or is excepted to origniate in
the next five years).
F.14. Pollutants. List the hazardous constituents that are received(or are expected to be received). Include data on volume and concentration,if
known. (Attach additional sheets if necessary.)
F.15. Waste Treatment.
a. Is this waste treated(or will be treated)prior to entering the treatment works?
❑ Yes ❑ No
If yes,describe the treatment(provide information about the removal efficiency):
b. Is the discharge(or will the discharge be)continuous or intermittent?
❑ Continuous 0 Intermittent If intermittent,describe discharge schedule.
END OF PART F.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 23 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
SUPPLEMENTAL APPLICATION INFORMATION
PART G. COMBINED SEWER SYSTEMS
If the treatment works has a combined sewer system,complete Part G.
G.1. System Map. Provide a map indicating the following: (may be included with Basic Application Information)
a. All CSO discharge points.
b. Sensitive use areas potentially affected by CSOs(e.g.,beaches,drinking water supplies,shellfish beds,sensitive aquatic ecosystems,and
outstanding natural resource waters).
c. Waters that support threatened and endangered species potentially affected by CSOs.
G.2. System Diagram. Provide a diagram,either in the map provided in G.1 or on a separate drawing,of the combined sewer collection system that
includes the following information.
a. Location of major sewer trunk lines,both combined and separate sanitary.
b. Locations of points where separate sanitary sewers feed into the combined sewer system.
c. Locations of in-line and off-line storage structures.
d. Locations of flow-regulating devices.
e. Locations of pump stations.
CSO OUTFALLS:
Complete questions G.3 through G.6 once for each CSO discharge point.
G.3. Description of Outfall.
a. Outfall number
b. Location
(City or town,if applicable) (Zip Code)
(County) (State)
(Latitude) (Longitude)
c. Distance from shore(if applicable) ft.
d. Depth below surface(if applicable) ft.
e. Which of the following were monitored during the last year for this CSO?
❑ Rainfall ❑ CSO pollutant concentrations ❑ CSO frequency
❑ CSO flow volume 0 Receiving water quality
f. How many storm events were monitored during the last year?
G.4. CSO Events.
a. Give the number of CSO events in the last year.
events (❑actual or❑approx.)
b. Give the average duration per CSO event.
hours (❑actual or❑approx.)
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 24 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
c. Give the average volume per CSO event.
million gallons(❑actual or D approx.)
d. Give the minimum rainfall that caused a CSO event in the last year
Inches of rainfall
G.5. Description of Receiving Waters.
a. Name of receiving water:
b. Name of watershed/river/stream system:
United State Soil Conservation Service 14-digit watershed code(if known):
c. Name of State Management/River Basin:
United States Geological Survey 8-digit hydrologic cataloging unit code(if known):
G.6. CSO Operations.
Describe any known water quality impacts on the receiving water caused by this CSO(e.g.,permanent or intermittent beach closings,permanent or
intermittent shell fish bed closings,fish kills,fish advisories,other recreational loss,or violation of any applicable State water quality standard).
END OF PART G.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE.
EPA Form 3510-2A(Rev.1-99). Replaces EPA forms 7550-6&7550-22. Page 25 of 22

,
Effluent Toxicity Report Form - Chronic Pass/Fail and Acute LC50 Date: 06/26/19
Facility: TOWN OF PITTSBORO NPDES#: NC0020354 Pipe#: 001 County: CHATHAM I
Laboratory Performing Test: R & A LABORATORIES, INC.
X Comments: Final Effluent
Sign ur Operator in Responsible Charge ' 68371-01 .
X
S na f Laboratory Supervisor * PASSED: 2.53% Reduction *
Work Order: 68291-01 Environmental Sciences Branch
MAIL ORIGINAL TO: Div. of Environmental Management
N.C. Dept. of EHNR
1621 Mail Service Ctr
Raleigh, North Carolina 27699-1621
North Carolina Ceriodaphnia
Chronic Pass/Fail Reproduction ToxicityTest
Chronic Test Results
Calculated t = 1.088
CONTROL ORGANISMS 1 2 3 4 5 6 7 8 9 10 11 12 % Tabular t = 2.508
Reduction = 2.53
# Young Produced I21 23 22 23 24 22 i 1 % Mortality 1 Avg.Reprod. I
22 25 22 25123124 23
I 0.00 23.08
Adult (L)ive (D)ead L L L L L L L L L lL L IL Control Control
0.00 22.50
Effluent t: 90% Treatment 2 Treatment 2
TREATMENT 2 ORGANISMS 1 2 3 4 5 6 7 8 9 10 11 12 Control CV
5.372% PASS FAIL
I I
# Young Produced 23 25 21 23 22 21 24 21 23 22 21 24 % control orgs X
producing 3rd
brood Check One Adult (L)ive (D)ead L L L IL L IL L L L IL L L I 1006 I 1
1st sample 1st sample 2nd sample I Complete This For Either Test
pH 'Test Start Date: 06/19/19
Control 6.96 7.04 6.95 7.04 6.95 7.03 Collection (Start) Date
Treatment 2 6.67 6.70 7.09 7.17 7.0817.15 Sample T: 0/Dati Sample 2: 06/19/19
p ype/Durration 2nd
1st P/F
s s s Grab Comp. Duration D
t e t e t e I T S S
a n a n a n Sample 1 X 24 .5 hrs L A A
r d r d r d i , U M M
t t t Sample 2 I X 24.5 hrs T P P
1st sample 1st sample 2nd sample
D.O. Hardness(mg/1) 481
Control 8.6 f118.4 18.6 8.3 8.6 8.4
Treatment 2 8.6 f8.4 8.6 18.3 8.6 8.4 Spec. Cond. (pmhos) 191 596 588
Chlorine(mg/1) 10.03 0.04
LC50/Acute Toxicity Test Sample temp. at receipt (°C) 3 .1 2.8
(Mortality expressed as %, combining replicates) I
( Note: Please% % % % % % % % % %I Concentration Complete This
l
% % % % % % % % % %I Mortality I Section Also
start/end start/end
LC50 = % Method of Determination Control
95% Confidence Limits Moving Average Probit _
c% -- % Spearman Karber - Other 11 RECEIVED
pH D.O.
OCT 0.8 2019
Organism Tested: Ceriodaphnia dubia Duration(hrs) :
Copied from DEM form AT-1 (3/87) rev. 11/95 (DUBIA ver. 4.32) NCDEQIDWRINPDES

Effluent Toxicity Report Form - Chronic Pass/Fail and Acute LC50 Q: J27/l9
Facility: TOWN OF PITTSBORO NPDES#: NC0020354 Pipe#: 001 County: CHATHAM 7
Laboratory erforming Test: R & A ORATORIES, INC.
/GyJGi`� _ Comments: Final Effluent
X Sly z..&C. 77 �:
Sign erator in Responsible Charge 64452-01
X
S na re of Laboratory Supervisor * PASSED: 1.47% Reduction *
Work Order: 64324-01 Environmental Sciences Branch
MAIL ORIGINAL TO: Div. of Environmental Management
N.C. Dept. of EHNR
1621 Mail Service Ctr
Raleigh, North Carolina 27699-1621
North Carolina Ceriodaphnia
Chronic Pass/Fail Reproduction Toxicity Test Chronic Test Results
Calculated t = 0.596
CONTROL ORGANISMS 1 2Tabular t = 2.508
3 4 5 6 7 8 S 10 11 i2 % Reduction = 1.47
1
I % Mortality Avg.Reprod. 1
# Young Produced 22 21 25 23 21 22'21124 25123 22 23
0.00 22.67
Control Control
Adult (L)ive (D)ead L L L L L L IL L L L L L
0.00 22.33 1
Treatment 2 1 Treatment 2
Effluent %: 90% i i
TREATMENT 2 ORGANISMS 1 2 3 4 5 6 7 8 9 10 11 12 Control CV
6.333% PASS FAIL
# Young Produced 21 25 22 23 21 22 21 23 22 24121 23 % control orgs X 1
producing 3rd 1
I I brood Check One!
Adult (L)ive (D)ead L L L L L IL L L IL L L L 100%
1st sample 1st sample 2nd sample Complete This For Either Test
pH Test Start Date: 03/20/19
Control 6.95 7.02 6.94 7.03 6.92 7.01 Collection (Start) Date
Sample 1: 03/18/19 Sample 2: 03/20/19
Treatment 2 6.95 7.03 6.76 6.84 6.75 6.83 Sample Type/Duration 2nd
1st P/F
s s s Grab Comp. Duration D
t e t e t e I S S
a n a n a n Sample 1 X 24 .5 hrs L A A
✓ d r d r d U M M
t t t Sample 2 I X 24.5 hrs T P P
1st sample 1st sample 2nd sample
D.O. i j j I Hardness(mg/1) f 481 1
Control 8.6 8.4 8.6 8.3 8.6 6.4
{ Spec. Cond. (pmhos) 190 484 506
Treatment 2 8.5 8.3 8.6 8.3 8.6 8.4 lI
Chlorine(mg/1) 0.03 0.02 ;
LC50/Acute Toxicity Test Sample temp. at receipt(°C) 2.5 3.2 I
(Mortality expressed as %, combining replicates) j
Note:I Pleas
% % I % I % % I I % Concentration Complete This
Section Also
%j % % % % % % % I % Mortality
start/end start/end
LC50 = % Method of Determination Control 1
95% Confidence Limits Moving Average - Probit _ I
% - % Spearman Karber Other High
Conc.
pH D.C.
Organism Tested: Ceriodaphnia dubia Duration(hrs) :
1 i
Copied from DEM form AT-1 (3/87) rev. 11/95 (DUBIA ver. 4.32)
1
1
I

//
Effluent Toxicity Report Form - Chronic Pass/Fail and Acute LC50 Date: 12/12/18
Facility: TOWN OF PITTSBORO NPDES#: NC0020354 Pipe#: 001 County: CHATHAM
Laborat ry Performing T st: R & A LABORATORIES, INC.
rG Comments: Final Effluent
X 2-co
n ure f rator in Responsible Charge 60078-01
X
S na re f Laboratory Supervisor * PASSED: 5.88% Reduction *
Work Order: 59904-01 Environmental Sciences Branch
MAIL ORIGINAL TO: Div. of Environmental Management
N.C. Dept. of EHNR
1621 Mail Service Ctr
Raleigh, North Carolina 27699-1621
North Carolina Ceriodaphnia
Chronic Pass/Fail Reproduction Toxicity Test Chronic Test Results
Calculated t = 2.577
Tabular t = 2.508
CONTROL ORGANISMS 1 2 3 4 5 6 7 8 9 10 11 12 % Reduction = 5.88
% Mortality Avg.Reprod.
# Young Produced 21 24 25 21 23 22 21 25 23 24 21 22
0.00 22.67
Control Control
Adult (L)ive (D)ead L L L L L L L L L L L L
0.00 21.33
Treatment 2 Treatment 2
Effluent %: 90%
TREATMENT 2 ORGANISMS 1 2 3 4 5 6 7 8 9 10 11 12 Control CV
6.869% PASS FAIL
# Young Produced 22 21 22 21 20 21 23 20 21 22 22 21 % control orgs X
• - producing 3rd
brood Check One
Adult (L)ive (D)ead L L L L L L L L L L L L 100%
1st sample 1st sample 2nd sample Complete This For Either Test t
pH Test Start Date: 12/05/18
Control 6.96 7.04 6.95 7.03 6.94 7.02 Collection (Start) Date
Sample 1: 12/03/18 Sample 2: 12/05/18
Treatment 2 6.30 6.38 7.05 7.13 7.04 7.12 Sample Type/Duration 2nd
1st P/F
s s s Grab Comp. Duration D
t e t e t e I S S
a n a n a n Sample 1 X 24.3 hrs L A A
r d r d r d U M M
t t t Sample 2 X 24.3 hrs T P P
1st sample 1st sample 2nd sample
D.O. - Hardness(mg/1) 48
Control 8.6 8.4 8.6 8.3 8.6 8.4
Spec. Cond. (pmhos) 191 438 469
Treatment 2 8.6 8.4 8.6 8.3 8.5 8.3
Chlorine(mg/1) 0.01 0.02
LC50/Acute Toxicity Test Sample temp. at receipt(°C) 3.2 2.9
(Mortality expressed as %, combining replicates)
Note: Please
% % I % I 1 % 1 % I Concentration Complete This
Section Also
% t % 1 1+ t 1 % % % Mortality
start/end start/end
LC50 = I Method of Determination Control
95% Confidence Limits Moving Average Probit
% -- I Spearman Karber _ Other - High
Conc.
pH D.O.
Organism Tested: Ceriodaphnia dubia Duration(hrs) :
Copied from DEM form AT-1 (3/87) rev. 11/95 (DUBIA ver. 4.32)

Effluent Toxicity Report Form - Chronic Pass/Fail and Acute LC50 Dat 03/18
Facility: TOWN OF PITTSBORO NPDES#: NC0020354 Pipe#: 001 Coun 'CHAT1AM
Laboro ryPerforming Test: & A LABORATORIES, INC. '
// //''��i� Comments: Final Effluent �.
X ✓ 7 A. 2 . 0// e,u..
/Align ure O ator in Responsible Charge 56769-01
XApi
S a - Laboratory Supervisor * PASSED: 2.90% Reduction *
Work Order: 56630-01 Environmental Sciences Branch
MAIL ORIGINAL TO: Div. of Environmental Management
N.C. Dept. of EHNR
1621 Mail Service Ctr
Raleigh, North Carolina 27699-1621
North Carolina Ceriodaphnia
Chronic Pass/Fail Reproduction Toxicity Test Chronic Test Results
Calculated t = 1.301
Tabular t = 2.508
CONTROL ORGANISMS 1 2 3 4 5 6 7 8 9 10 11 12 % Reduction = 2.90
% Mortality Avg.Reprod.
# Young Produced 23 24 25 23 22 24 23 25 21 22 23 21
0.00 23.00
Control Control
Adult (L)ive (D)ead L L L L L L L L L L L L
0.00 22.33
Treatment 2 Treatment 2
Effluent %: 90%
TREATMENT 2 ORGANISMS 1 2 3 4 5 6 7 8 9 10 11 12 Control CV
5.863% PASS FAIL
# Young Produced 21 24 22 23 23 21 22 23 21 24 21 23 % control orgs X
producing 3rd
brood Check One
Adult (L)ive (D)ead L L L L L L L L L L L L 100%
1st sample 1st sample 2nd sample Complete This For Either Test
pH Test Start Date: 09/26/18
Control 6.94 7.02 6.93 7.02 6.93 7.01 Collection (Start) Date
Sample 1: 09/24/18 Sample 2: 09/26/18
Treatment 2 6.78 6.87 6.49 6.58 6.50 6.58 Sample Type/Duration 2nd
1st P/F
s s s Grab Comp. Duration D
t e t e t e I S S .
a n a n a n Sample 1 X 25.3 hrs L A A
✓ d r d r d - U M M
t t t Sample 2 X 25 hrs T P P
1st sample 1st sample 2nd sample
D.O. Hardness(mg/1) 48
Control 8.6 8.4 8.6 8.3 8.5 8.3
Spec. Cond. (pirhos) 191 454 493
Treatment 2 8.6 8.4 8.6 8.3 8.5 8.3
- Chlorine(mg/1) 0.02 0.02
LC50/Acute Toxicity Test Sample temp. at receipt(°C) 3 .8 2.0
(Mortality expressed as %, combining replicates) I
Note: Please
% % % % % % % % % % Concentration Complete This
Section Also
% % % % % % % % % % Mortality
start/end start/end
LC50 = % Method of Determination Control
95% Confidence Limits Moving Average Probit
t -- % Spearman Karber _ Other - High
Conc.
pH D.O.
Organism Tested: Ceriodaphnia dubia Duration(hrs) :
Copied from DEM form AT-1 (3/87) rev. 11/95 (DUBIAver. 4.32)

ri COPY
Effluent Toxicity Report Form - Chronic Pass/Fail and Acute LC50 Date: 06/20/18
Facility: TOWN OF PITTSBORO NPDES#: NC0020354 Pipe#: 001 County: CHATHAM
Labora Performing Gi� &�ORATORIES, INC.
Comments: Final Effluent
X 2 'zfiy�
ture Op tor in Responsible Charge 52047-01
X
S _ Laboratory Supervisor * PASSED: 1.46% Reduction *
Work Order:r 51889-01 Environmental Sciences Branch
MAIL ORIGINAL TO: Div. of Environmental Management
N.C. Dept. of EHNR
1621 Mail Service Ctr
Raleigh, North Carolina 27699-1621
North Carolina Ceriodaphnia
Chronic Pass/Fail Reproduction Toxicity Test Chronic Test Results
Calculated t = 0.616
Tabular t = 2.508
CONTROL ORGANISMS 1 2 3 4 5 6 7 8 9 10 11 12 % Reduction = 1.46
% Mortality Avg.Reprod.
# Young Produced 24 21 25 22 23 22 21 23 24 23 '21 25
0.00 22.83
Control Control
Adult (L)ive (D)ead ' L L L 'L 'L L L L L L L L
0.00 22.50
Treatment 2 Treatment 2
Effluent %: 90%
TREATMENT 2 ORGANISMS 1 2 3 4 5 6 7 8 9 10 11 12 Control CV
6.424% PASS FAIL
# Young Produced 22 23 22 21 25 24 23 22 22 23 21 22 % control orgs X
producing 3rd
brood Check One
Adult (L)ive (D)ead L L L L L L L L L L L L 100%
1st sample 1st sample 2nd sample Complete This For Either Test
pH Test Start Date: 06/13/18
Control 6.96 7.04 6.95 7.03 6.94 7.02 Collection (Start) Date
Sample 1: 06/11/18 Sample 2: 06/13/18
Treatment 2 6.74 6.82 6.96 7.04 7.03 7.11 Sample Type/Duration 2nd
1st P/F
s s s Grab Comp. Duration D
t e t e t e I S S
a n a n a n Sample 1 X 25 hrs L A A
✓ d r d r d U M M
t t t Sample 2 X 26 hrs T P P
1st sample 1st sample 2nd sample
D.O. Hardness(mg/1) 48
Control 8.6 8.4 8.6 8.3 8.6 8.4 -
Spec. Cond. (}unhos) 192 625 608
Treatment 2 8.6 8.4 8.6 8.3 8.6 8.4
Chlorine(mg/1) 0.04 0.04
LC50/Acute Toxicity Test Sample temp. at receipt(°C) 3.0 3.2
(Mortality expressed as %, combining replicates) I
Note: Please
% % % % % % % % I % Concentration _ Complete This
Section Also
I I I I I I I % I I Mortality
start/end start/end
LC50 = I Method of Determination Control
95% Confidence Limits Moving Average _ Probit
I -- I Spearman Karber Other - High
Conc.
pH D.O.
Organism Tested: Ceriodaphnia dubia Duration(hrs) :
Copied from DEM form AT-1 (3/87) rev. 11/95 (DUBIA ver. 4.32)

f
Effluent Toxicity Report Form - Chronic Pass/Fail and Acute LC50 Date: 03/21/18
Facility: TOWN OF PITTSBORO NPDES#: NC0020354 Pipe#: 001 County: CHATHAM
Laborator Performing Test: R & A LABORATORIES, INC.
X -
,z ` /�j�`` ' � Comments: Final Effluent
Si ur .�. •.-rator in ResponsibleCharge 47933-01
X ,
S gn e "Laboratory Supervisor * PASSED: 19.93% Reduction *
work Order: 47766-01 Environmental Sciences Branch
MAIL ORIGINAL TO: Div. of Environmental Management
N.C. Dept. of EHNR
1621 Mail Service Ctr
Raleigh, North Carolina 27699-1621
North Carolina Ceriodaphnia
Chronic Pass/Fail Reproduction Toxicity Test I Chronic Test Results
Calculated t = 8.232
Tabular t = 2.508
CONTROL ORGANISMS 1 2 3 4 5 6 7 8 9 10 11 12 % Reduction = 19.93
# Young Produced 25 23 22 24 22 21 23 25 21 24125 21 $ Mortality Avg.Reprod.
0.00 23 .00
Control Control
Adult (L)ive (D)ead L L L L L L L L L L I L L
0.00 I 18.42
Treatment 2 Treatment 2 1
Effluent %: 90%
TREATMENT 2 ORGANISMS 1 2 3 4 5 6 7 8 9 10 11 12 Control CV
6.937% PASS FAIL
# Young Produced 18 19 17 19 20 18 17 19 18 20 17 19 % control orgs X
producing 3rd
brood 'Check Ones
Adult (L) ive (D)ead L L L L L L L L L L L L 100%
1st sample 1st sample 2nd sample Complete This For Either Test
pH Test Start Date: 03/14/18
Control 6.95 7.03 6.93 7.02 6.93 7.01 Collection (Start) Date
Sample 1: 03/12/18 Sample 2: 03/14/18
Treatment 2 7.55 7.63 6.47 6.55 6.48 6.57 Sample Type/Duration 2nd
1st P/F
s s s Grab Comp. Duration D
t e t e t e I S S
a n a n a n Sample 1 X 25 hrs L A A
✓ d r d r d U M M
t t t Sample 2 1 X 25 hrs T P P
1st sample 1st sample 2nd sample
D.O. Hardness(mg/1) 481
Control 8.6 8.4 8.6 8.3 8.6 8.4
Spec. Cond. (mmhos) 188 575 508
Treatment 2 8.6 8.4 8.6 8.3 8.6 8.4
Chlorine(mg/1) 0.02 0.04
LC50/Acute Toxicity Test Sample temp. at receipt (°C) 3.0 2.8
(Mortality expressed as %, combining replicates
( ) 1
l % % %I Is %I % % %I % % Concentration Note: ase
Complete This
Section Also I
% % % % % % % %I % % Mortality
start/end start/end
LC50 = % I Method of Determination Control
95% Confidence Limits Moving Average Probit
% -- % Spearman Karber _ Other - High
Conc.
pH D.O.
I
Organism Tested: Ceriodaphnia dubia Duration(hrs) :
,
Copied from DEM form AT-1 (3/87) rev. 11/95 (DUBIA ver. 4.32)

ENCOLaboratorks
Accurate. Timely. Responsive. Innovative.
102-A Woodwinds Industrial Court
Cary NC,27511
Phone: [phone] FAX: [phone]
Friday,July 26, 2019 RECEIVED
TOWN OF PITTSBORO(T0009) OCT 0 i3 2019
Attn: Jamie Mclaurin
PO BOX 759 NCDEQ/DWR/NPDES
PITTSBORO, NC 27312-
RE: Laboratory Results for
Project Number: [none], Project Name/Desc: Priority Pollutant Scan
ENCO Workorder(s): CC11263
Dear Jamie Mclaurin,
Enclosed is a copy of your laboratory report for test samples received by our laboratory on
Wednesday,July 10, 2019.
Unless otherwise noted in an attached project narrative, all samples were received in
acceptable condition and processed in accordance with the referenced methods/procedures.
Results for these procedures apply only to the samples as submitted.
The analytical results contained in this report are in compliance with NELAC standards, except
as noted in the project narrative if applicable. This report shall not be reproduced except in
full,without the written approval of the Laboratory.
This report contains only those analyses performed by Environmental Conservation
Laboratories. Unless otherwise noted, all analyses were performed at ENCO Cary. Data from
outside organizations will be reported under separate cover.
If you have any questions or require further information, please do not hesitate to contact me.
Sincerely,
Stephanie Franz
Project Manager
Enclosure(s)
FINAL This report relates only to the sample as received by the laboratory,and may only be reproduced in full. Page 1 of 9

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ANALYTICAL RESULTS
1
Description: Effluent Lab Sample ID:CC11263-01 Received: 07/10/19 12:30
Matrix: Waste Water Sampled:07/10/19 09:15 Work Order:CC11263
Project: Priority Pollutant Scan Sampled By:Client
Volatile Organic Compounds by GCMS
^-ENCO Cary certified ana/yte[NC 591]
Analvte [CAS Number] Results Flaq Units ILF MDL M. Batch Method Analyzed Iy Notes
1,1,1-Trichloroethane[71-55-6]^ 0.80 U ug/L 1 0.80 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
1,1,2,2-Tetrachloroethane[79-34-5]^ 0.54 U ug/L 1 0.54 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
1,1,2-Trichloroethane[79-00-5]^ 0.76 U ug/L 1 0.76 1.0 9610014 EPA 624.1 07/10/19 19:04 MRK
1,1-Dichloroethane[75-34-3]^ 0.62 U ug/L 1 0.62 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
1,1-Dichloroethene[75-35-4]^ 0.94 U ug/L 1 0.94 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
1,2-Dibromoethane[106-93-4]^ 0.78 U ug/L 1 0.78 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
1,2-Dichlorobenzene[95-50-1]^ 0.73 U ug/L 1 0.73 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
1,2-Dichloroethane[107-06-2]^ 0.63 U ug/L 1 0.63 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
1,2-Dichloropropane[78-87-5]^ 0.80 U ug/L 1 0.80 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
1,3-Dichlorobenzene[541-73-1]^ 0.77 U ug/L 1 0.77 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
1,4-Dichlorobenzene[106-46-7]^ 0.76 U ug/L 1 0.76 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
2-Chloroethyl Vinyl Ether[110-75-8]^ 1.9 U ug/L 1 1.9 5.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
Acrolein[107-02-8]^ 6.4 U ug/L 1 6.4 10 9G10014 EPA 624.1 07/10/19 19:04 MRK
Acrylonitrile[107-13-1] 3.2 U ug/L 1 3.2 10 9G10014 EPA 624.1 07/10/19 19:04 MRK
Benzene[71-43-2]^ 0.71 U ug/L 1 0.71 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
Bromodichloromethane[75-27-4]^ 0.52 U ug/L 1 0.52 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
Bromoform[75-25-2]^ 0.75 U ug/L 1 0.75 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
Bromomethane[74-83-9]^ 0.95 U ug/L 1 0.95 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
Carbon tetrachloride[56-23-5]^ 0.94 U ug/L 1 0.94 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
Chlorobenzene[108-90-7]^ 0.72 U ug/L 1 0.72 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
Chloroethane[75-00-3]^ 0.98 U ug/L 1 0.98 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
Chloroform[67-66-3]^ 0.80 U ug/L 1 0.80 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
Chloromethane[74-87-3]^ 0.82 U ug/L 1 0.82 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
cis-1,3-Dichloropropene[10061-01-5]^ 0.59 U ug/L 1 0.59 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
Dibromochloromethane[124-48-1]^ 0.44 U ug/L 1 0.44 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
Ethylbenzene[100-41-4]^ 0.69 U ug/L 1 0.69 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
Methylene chloride[75-09-2]^ 2.0 U ug/L 1 2.0 5.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
Tetrachbroethene[127-18-4]^ 0.76 U ug/L 1 0.76 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
Toluene[108-88-3]^ 0.72 U ug/L 1 0.72 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
trans-1,2-Dichloroethene[156-60-5]^ 0.73 U ug/L 1 0.73 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
Trichbroethene[79-01-6]^ 0.89 U ug/L 1 0.89 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
Vinyl chloride[75-01-4]^ 0.71 U ug/L 1 0.71 1.0 9G10014 EPA 624.1 07/10/19 19:04 MRK
Surrvaates Results 2E Soike L H %Rec %Rec Limits IMO Ifitbad Anabzild Jr Notes
4-Bromofluorobenzene 53 1 50.0 107% 41-142 9610014 EPA 624.1 07/10/19 19:04 MRK
4-Bromofluorobenzene 53 1 50.0 107% 41-142 9610014 EPA 624.1 07/10/19 19:04 MRK
Dibromofluoromethane 48 1 50.0 97% 53-146 9610014 EPA 624.1 07/10/1919:04 MRK
Dibromofluoromethane 48 1 50.0 97% 53-146 9610014 EPA 624.1 07/10/1919:04 MRK
Toluene-d8 49 1 50.0 98% 41-146 9610014 EPA 624.1 07/10/19 19:04 MRK
Toluene-d8 49 1 50.0 98% 41-146 9610014 EPA 624.1 07/10/1919:04 MRK
FINAL This report relates only to the sample as received by the laboratory,and may only be reproduced in full. Page 2 of 9

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ANALYTICAL RESULTS
Description: Effluent Lab Sample ID:CC11263-01 Received: 07/10/19 12:30
Matrix: Waste Water Sampled:07/10/19 09:15 Work Order:CC11263
Project: Priority Pollutant Scan Sampled By:Client
1
Semivolatile Organic Compounds by GCMS
^-ENCO Caty certified analyte[NC 591]
Analyte FCAS Numberl Results flag Units DF MDL POL Batch Method Analyzed By Notes
1,2,4-Trichlorobenzene[120-82-1]^ 3.3 U ug/L 1 3.3 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
2,4,6-Trichlorophenol[88-06-2]^ 6.4 U ug/L 1 6.4 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
2,4-Dichlorophenol[120-83-2]^ 6.5 U ug/L 1 6.5 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
2,4-Dimethylphenol[105-67-9]^ 6.4 U ug/L 1 6.4 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
2,4-Dinitrophenol[51-28-5]^ 7.7 U ug/L 1 7.7 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
2,4-Dinitrotoluene[121-14-2]^ 3.2 U ug/L 1 3.2 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
2,6-Dinitrotoluene[606-20-2]^ 2.9 U ug/L 1 2.9 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
2-Chloronaphthalene[91-58-7]^ 3.2 U ug/L 1 3.2 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
2-Chlorophenol[95-57-8]^ 7.4 U ug/L 1 7.4 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
2-Methyl-4,6-dinitrophenol[534-52-1]^ 6.0 U ug/L 1 6.0 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
2-Nitrophenol[88-75-5]^ 5.2 U ug/L 1 5.2 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
3,3'-Dichlorobenzidine[91-94-1]^ 3.3 U ug/L 1 3.3 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
4-Bromophenyl-phenylether[101-55-3]^ 3.3 U ug/L 1 3.3 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
4-Chloro-3-methylphenol[59-50-7]^ 7.3 U ug/L 1 7.3 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
4-Chlorophenyl-phenylether[7005-72-3]^ 3.2 U ug/L 1 3.2 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
4-Nitrophenol[100-02-7]^ 7.9 U ug/L 1 7.9 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Acenaphthene[83-32-9]^ 3.0 U ug/L 1 3.0 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Acenaphthylene[208-96-8]^ 9.6 U ug/L 1 9.6 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Anthracene[120-12-7]^ 3.0 U ug/L 1 3.0 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Benzidine[92-87-5]^ 7.1 U ug/L 1 7.1 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Benzo(a)anthracene[56-55-3]^ 3.2 U ug/L 1 3.2 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Benzo(a)pyrene[50-32-8]^ 3.2 U ug/L 1 3.2 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Benzo(b)fluoranthene[205-99-2]^ 3.4 U ug/L 1 3.4 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Benzo(g,h,i)perylene[191-24-2]^ 3.7 U ug/L 1 3.7 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Benzo(k)fluoranthene[207-08-9]^ 3.8 U ug/L 1 3.8 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Bis(2-chloroethoxy)methane[111-91-1]^ 3.3 U ug/L 1 3.3 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Bis(2-chloroethyl)ether[111-44-4]^ 3.8 U ug/L 1 3.8 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Bis(2-chbroisopropyl)ether[108-60-1]^ 3.5 U ug/L 1 3.5 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Bis(2-ethylhexyl)phthalate[117-81-7]^ 3.5 U ug/L 1 3.5 5.0 9G15019 EPA 625.1 07/16/19 22:05 DFM
Butylbenzylphthalate[85-68-7]^ 5.1 U ug/L 1 5.1 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Chrysene[218-01-9]^ 3.0 U ug/L 1 3.0 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Dibenzo(a,h)anthracene[53-70-3]^ 3.8 U ug/L 1 3.8 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Diethylphthalate[84-66-2]^ 3.0 U ug/L 1 3.0 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Dimethylphthalate[131-11-3]^ 3.0 U ug/L 1 3.0 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Di-n-butylphthalate[84-74-2]^ 3.2 U ug/L 1 3.2 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Di-n-octylphthalate[117-84-0]^ 4.7 U ug/L 1 4.7 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
DPH(as Azobenzene)[103-33-3] 3.1 U ug/L 1 3.1 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Fluoranthene[206-44-0]^ 4.0 U ug/L 1 4.0 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Fluorene[86-73-7]^ 2.9 U ug/L 1 2.9 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Hexachlorobenzene[118-74-1]^ 3.0 U ug/L 1 3.0 10 9G15019 EPA 625.1 07/16/19 22:05 DEM I
Hexachlorobutadiene[87-68-3]^ 4.1 U ug/L 1 4.1 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Hexachlorocycbpentadiene[77-47-4]^ 3.8 U ug/L 1 3.8 10 9G15019 EPA 625.1 07/16/19 22:05 DEM
Hexachloroethane[67-72-1]^ 3.0 U ug/L 1 3.0 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Indeno(1,2,3-cd)pyrene[193-39-5]^ 4.1 U ug/L 1 4.1 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Isophorone[78-59-1]^ 4.5 U ug/L 1 4.5 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Naphthalene[91-20-3]^ 3.6 U ug/L 1 3.6 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Nitrobenzene[98-95-3]^ 3.2 U ug/L 1 3.2 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
FINAL This report relates only to the sample as received by the laboratory,and may only be reproduced in full. Page 3 of 9

, _
(EJc')
www.encolabs.com
ANALYTICAL RESULTS II
Description: Effluent Lab Sample ID:CC11263-01 Received: 07/10/19 12:30
Matrix: Waste Water Sampled:07/10/19 09:15 Work Order:CC11263
Project: Priority Pollutant Scan Sampled By:Client
Semivolatile Organic Compounds by GCMS
^-ENCO Cary certified analyte[NC 5911
Analvte [CAS Number) Results Flag iy_Atg DF fAU P_QL Batch Method Analyzed By Notes
N-Nitrosodimethylamine[62-75-9]^ 3.8 U ug/L 1 3.8 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
N-Nitroso-di-n-propylamine[621-64-7]^ 4.5 U ug/L 1 4.5 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
N-nitrosodiphenylamine/Diphenylamine 5.4 U ug/L 1 5.4 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
[86-30-6/122-39-4]^
Pentachlorophenol[87-86-5]^ 8.2 U ug/L 1 8.2 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Phenanthrene[85-01-8]^ 2.8 U ug/L 1 2.8 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Phenol[108-95-2]^ 5.6 U ug/L 1 5.6 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Pyrene[129-00-0]^ 4.1 U ug/L 1 4.1 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
,u[D2fliftf. Result! RE Snik€Lvi °giter %Rec Limits Bates Rafted Amazed RV 1I42Ca
2,4,6-Tribromophenal 100 1 100 103% 47-128 9G15019 EPA 625.1 07/16/19 22:05 DFM
2-Fluorobiphenyl 42 1 50.0 84% 44-102 9615019 EPA 625.1 07/16/19 22:05 DFM
2-Fluorophenol 58 1 100 58% 25-79 9615019 EPA 625.1 07/16/19 22:05 DFM
Nitrobenzene-d5 39 1 50.0 78% 43-112 9G15019 EPA 625.1 07/16/19 22:05 DFM
Phenol-OS 52 1 100 52% 14-54 9615019 EPA 625.1 07/16/19 22:05 DFM
Terphenyl-d14 47 1 50.0 94% 65-122 9615019 EPA 625.1 07/16/19 22:05 DEM
Metals by EPA 200 Series MethodsIl
^-ENCO Cary certified analyte[NC 5911
Apalvte [CAS Number) Results EIDD Units DE I1121. PQL @alch MON& Analyzed BY Matra
Antimony[7440-36-0]^ 0.37 U ug/L 1 0.37 1.00 9G12014 EPA 200.8 07/16/19 13:18 CMK
Arsenic[7440-38-2]^ 7.60 U ug/L 1 7.60 10.0 9G12022 EPA 200.7 07/16/19 11:25 JDH
Beryllium[7440-41-7]^ 0.160 U ug/L 1 0.160 1.00 9G12022 EPA 200.7 07/16/19 11:25 )DI-I
Cadmium[7440-43-9]^ 0.360 U ug/L 1 0.360 1.00 9G12022 EPA 200.7 07/16/19 11:25 JDH
Chromium[7440-47-3]^ 1.40 U ug/L 1 1.40 10.0 9G12022 EPA 200.7 07/16/19 11:25 3DH
Copper[7440-50-8]^ 2.96 3 ug/L 1 1.60 10.0 9G12022 EPA 200.7 07/16/19 11:25 JDH
Lead[7439-92-1]^ 3.10 U ug/L 1 3.10 10.0 9G12022 EPA 200.7 07/16/19 11:25 JDH
Nickel[7440-02-0]^ 2.64 3 ug/L 1 2.20 10.0 9G12022 EPA 200.7 07/16/19 11:25 JDH
Selenium[7782-49-2]^ 0.91 U ug/L 1 0.91 3.00 9612014 EPA 200.8 07/16/19 13:18 CMK
Silver[7440-22-4]^ 1.90 U ug/L 1 1.90 10.0 9G12022 EPA 200.7 07/16/19 11:25 JOH
Thallium[7440-28-0]^ 0.110 U ug/L 1 0.110 1.00 9G12014 EPA 200.8 07/16/19 13:18 CMK
Zinc[7440-66-6]^ 60.7 ug/L 1 4.40 10.0 9G12022 EPA 200.7 07/16/19 11:25 JDH
Classical Chemistry ParametersIl
^-ENCO Cary certified analyte[NC 5911
Analvte ICAS Number) Results Elan Units PE MRL 1N7.1 1!alsh Method Analyzed fix tido
Ammonia as N[7664-41-71^ 0.045 U mg/L 1 0.045 0.10 9G17036 EPA 350.1 07/17/19 16:31 NMN
Cyanide(total)[57-12-5]^ 0.0049 U mg/L 1 0.0049 0.0050 9G15013 EPA 335.4 07/16/19 09:56 MKS
Hardness^ 67 mg/L 1 0.14 0.0 9G12022 SM 2340B-2011 07/16/19 11:25 JDH
Nitrate/Nitrite as N^ 6.6 D mg/L 10 0.41 1.0 9G16032 EPA 353.2 07/17/19 09:34 MKS
Phosphorus[7723-14-0]^ 0.11 mg/L 1 0.025 0.10 9G17021 EPA 365.4 07/18/19 13:28 NMN
Total Dissolved Solids^ 350 mg/L 1 50 50 9G15036 SM 2540C-2011 07/16/19 14:33 JOC
Total Kjeldahl Nitrogen^ 0.96 mg/L 1 0.26 0.48 9G12010 EPA 351.2 07/15/19 15:37 NMN
FINAL This report relates only to the sample as received by the laboratory,and may only be reproduced in full. Page 4 of 9

C � CD)
www.encolabs.com
ANALYTICAL RESULTS
Description: Effluent Lab Sample ID:CC11263-01 Received: 07/10/19 12:30
Matrix: Waste Water Sampled:07/10/19 09:15 Work Order:CC11263
Project: Priority Pollutant Scan Sampled By:Client
Classical Chemistry Parameters
-ENCO Orlando certified analyte[AC 424]
Analyte ICAS Number) Results Flaq Units DF MDL P L Batch Method Analyzed Notes
Phenolics^ 0.034 U mg/L 1 0.034 0.050 9G15038 EPA 420.1 07/17/19 14:07 ASR
Classical Chemistry Parameters
^-ENCO Jacksonville certified analyte[AC 442]
Analvte fCAS Number) Results Flag Units PE MPl P91 P ch Method Analyzed Ay Notes
Oil&Grease(HEM)[C-0007]^ 3.50 J mg/L 1 1.50 5.00 9G15014 EPA 1664E 07/18/19 12:23 SMA
FINAL This report relates only to the sample as received by the laboratory,and may only be reproduced in full. Page 5 of 9

•
www.encolabs.com
FLAGS/NOTES AND DEFINITIONS
B The analyte was detected in the associated method blank.
D The sample was analyzed at dilution.
] The reported value is between the laboratory method detection limit(MDL)and the laboratory method
reporting limit(MRL),adjusted for actual sample preparation data and moisture content,where applicable.
U The analyte was analyzed for but not detected to the level shown,adjusted for actual sample preparation
data and moisture content,where applicable.
E The concentration indicated for this analyte is an estimated value above the calibration range of the
instrument.This value is considered an estimate.
MRL Method Reporting Limit.The MRL is roughly equivalent to the practical quantitation limit(PQL)and is
based on the low point of the calibration curve,when applicable,sample preparation factor,dilution
factor,and,in the case of soil samples, moisture content.
PQL PQL: Practical Quantitation Limit. The PQL presented is the laboratory MRL.
N The analysis indicates the presence of an analyte for which there is presumptive evidence(85%or greater
confidence)to make a"tentative identification".
P Greater than 25%concentration difference was observed between the primary and secondary GC column.
The lower concentration is reported.
[CALC] Calculated analyte-MDL/MRL reported to the highest reporting limit of the component analyses.
QM-07 The spike recovery was outside acceptance limits for the MS and/or MSD. The batch was accepted based
on acceptable LCS recovery.
QM-12 Precision between duplicate samples was outside acceptance limits.
•
FINAL This report relates only to the sample as received by the laboratory,and may only be reproduced in full. Page 6 of 9

ENVIRONMENTAL CONSERVATION LABORATORIES CHAIN-OF-CUSTODY RECORD www.encolabs, m
CEISItam O 10775 Central Port Dr. 4810 Executive Park Court,Suite 111 102-A Woodwinds Industrial Ct. O3
_ Orlando.FL 32824 Jacksonville,FL 32216-6069 Cary,NC 27511 O
[phone] Fax[phone] [phone] Fax[phone] [phone] Fax[phone] Page of N-
Client Name Protect Number Requested Analyses
TOWN OF PITTSBORO (T0009) [none] N y Request Times a
aro
F Times
Address Project Name/Desc o
PO BOX 759 Priority Pollutant Scan W o P �. Note Hush requests sublr
!, a V) acceptance by the lactlny
City/ST/Zip PO r/Billing Info N Ja-
a N V) LO
PITSBORO, NC 27312 a) co Standard
- C
Tel Fax Reporting Contact X
Q) °z_ ` O = m Cl
[phone] 0- Jamie Mciaurin o o = 8 Expedited
Samplers)Name.Affiliation(Print) Billing Contact
U Q_ c>
Accounts Payable < �' > o Due / /
r3 2 c t 0 c
.a. Lo .2 I el - CO - -
Sampler(s)Signature Site Location/Time Zone CNI CV CV EE
CD CD CS) ¢°P c ..VP) U U J O cia � Lab Workorder
CC 11263
Preservation(See Codes)(Combine as necessary)
Collection Matrix Total a of
Item a Sample ID(Field Identification) Collection Date Time Comp i Grab (see codes) Containers Sample Comments
Effluent 7/jab 9: C ww 14 X X X X X X X X X X
Low Level Mercury Blank 71/0// l I5 VYW 1
X
- --- -- - ------
i
<--Total#of Containers
Sample Kit Prepared y �eeTinne 1 Reiff uisfted By� \ D`aatte','T'imee'/ '�Received By Dal one /%
Comments/Special50
Reporting Requirements J ` ellnquishetl By Dat ne�� �,� `eived � �� I'`
y 4r71/1
Oat nine
Relinquished By Date/Time Received By
Dale/Time
Cooler IS 8 Temps on Recei Condition Upon Receipt
~ 3 �
G�
� ' `1 - l X Acceptable Unacceptable_
Matrix GW-Groundwater SO-Soil OW-Drinking Water SE-Sediment SW-Surtace Water WW-Wastewater A-Air 0-Other(detail in comments) Preservation:I-Ice H-HCI N-HNO3 S-H2504 NO-NaOH 0-Other(detail in comments)
Note All samples submitted to ENCO Labs are in accordance with the terms and conditions listed on the reverse of this form,unless prior written agreements exist

ENVIRONMENTAL CONSERVATION LABORATORIES CHAIN-OF-CUSTODY RECORD www.encoIabs m
(ENE O 10775 Central Port Dr. 4810 Executive Park Court,Suite 111 102-A Woodwinds Industrial Ct.
Orlando,FL 32824 Jacksonville,FL 32216-6069 Cary,NC 27511 _
[phone] Fax[phone] [phone] Fax[phone] [phone] Fax[phone] Page of 5
— 00
Client Name Protect Number Requested Analyses Requested Turnaroi Cl)
TOWN OF PITTSBORO (T0009) [none] Times as
Address Project Name/Desc Note:Rush r j
PO BOX 759 Priority Pollutant Scan acceptance y he la ifisy—
City/ST/Zip PO II/Billing Info
PI TTSBORO, NC 27312- U Standard
0
Tel Fax Reporting Contact
[phone] 0- Jamie Mclaurin Lo Expedited
Sampler(s)Name,Affiliation(Print) Bitting Contact
Accounts Payable CO Due /
CO
Sampler(s)Signature Site Location i Time ZoneCI Lab Workorder
- CC 11263
Preservation(See Cocos)(Combine as necessary)
Collection Matrix Total a or
Item if Sample ID(Field Identification) Collection Date Time Comp/Grab (see codes) Containers Sample;COH i umei its
Effluent MN 14 X -
Low Level Mercury Blank 1WV 1 I
-I I- .. ____
, .
_ .._ . .
1
7
_ _ , ....._ _ _
<--Total#of Containers
_
Sample Kit Prepared By Date,Time Relinquished By Date/Time Re Iced By - j'y.'4( DaterTime
Comments/Special Reporting Requirements Reingushed By Date/Time Rt ved y Date/trime
Relinquished By Date/Time Received By Date/Time
• Cooler fr's&Temps on Receipt 1 t ) Condition Upon Receipt
.✓( - l'Acceptable Unacceptable
Matrix:GW-Groundwater SO-Soil OW-Drinking Water SE-Sediment SW-Sudace Water W W-Waslewator A-Air 0-Other(detail in comments) Preservation:I-Ice N-HCI N-HNO3 S-H2SO4 NO-NaOH 0-Other(detail in comments)
• Note:All samples submitted to ENCO Labs are in accordance with the terms and conditions listed on the reverse of this form.unless prior written agreements exist

Sample Preservation Verification
ENCO Cary (€.ISic: c )`
Work Order: CC11263 Project: Priority Pollutant Scan
Client: TOWN OF PITTSBORO (T0009) [noneProject ]
#:
[ ]
Logged In: 10-Jul-19 13:15 II Logged By: Rachel Ann Yonish
Preservation Check Performed By: I`I Date/Time. /11 tJ�l
C C 11263-01
Cont Type Pres(pH) pH Checked/ pH Adjusted Date/ime Reagent Used/Comments
Requirement In Control Adjusted
B 250mLA+H2SO4 <2 Y / N / AI Y / N / A
C 250mLA+H2SO4 <2 Y / N / 'Y / N / A
D 250mLA+H2SO4 <2 Y / N / NA Y / N / NA
E 250mLP+H2SO4 <2 N / NA Y /8/ NA
F 250mLP+HNO3 <2 N / NA Y / N NA
G 250mLP+NaOH >12 / N / NA Y N NA
Reagent Name ID Reagent Name ID Reagent Name ID
1 3 5
2 4 6
pH Strip ID.
PH Strips C8J0741 Page 9 of 9
C:\elmnt\Print\WKu_rieaCivaiwii� ii��nrpt Page 1 of 1

Pace Analytical Services,LLC
aceAnalytical 9800 Kincey Ave. Suite 100
078
� Huntersville,NC 28078
www.pacelabs.com [phone]
July 26, 2019
Ms. Stephanie Franz RECEIVED
ENCO Labs
102 A-Woodswinds Industrial Co OCT 08 2019
Cary, NC 27511
NCDEQIDWRINPDES
RE: Project: CC11263
Pace Project No.: 92436414
Dear Ms. Franz:
Enclosed are the analytical results for sample(s) received by the laboratory on July 11, 2019. The
results relate only to the samples included in this report. Results reported herein conform to the most
current, applicable TNI/NELAC standards and the laboratory's Quality Assurance Manual, where
applicable, unless otherwise noted in the body of the report.
If you have any questions concerning this report, please feel free to contact me.
Sincerely,
Sarah Graham
[e-mail]
[phone]
Project Manager
Enclosures
cc: Chuck Smith,ENCO Labs
r
i - REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced,except in full,
without the written consent of Pace Analytical Services,LLC. Page 1 of 11

Pace Analytical Services,LLC
aceAnalytical 9800 Kincey Ave. Suite100
Huntersville,NC 28078078
www.pacelabs.com [phone]
CERTIFICATIONS
Project: CC11263
Pace Project No.: 92436414
Asheville Certification IDs
2225 Riverside Drive,Asheville,NC 28804 North Carolina Wastewater Certification#:40
Florida/NELAP Certification#:E87648 South Carolina Certification#:99030001
Massachusetts Certification#:M-NC030 VirginiaNELAP Certification#:460222
North Carolina Drinking Water Certification#:37712
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced,except in full,
without the written consent of Pace Analytical Services,LLC. Page 2 of 11

Pace Analytical Services,LLC
Kincey Ave. 100
aceAnalytical® 9800Huntersv Ile,NC1te 28078
www.pacelabs.com [phone]
SAMPLE ANALYTE COUNT
Project: CC11263
Pace Project No.: 92436414
Analytes
Lab ID Sample ID Method Analysts Reported Laboratory
92436414001 EFFLUENT EPA 1631E RDT 1 PASI-A
92436414002 LLHG BLANK EPA 1631E RDT 1 PASI-A
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced,except in full,
without the written consent of Pace Analytical Services,LLC. Page 3 of 11

Pace Analytical Services,LLC
aceAnalytical 9800 Kincey Ave. Suite 100
Huntersville,NC 28078
wwwpacelabs.com [phone]
ANALYTICAL RESULTS
Project: CC11263
Pace Project No.: 92436414
Sample: EFFLUENT Lab ID: 92436414001 Collected: 07/10/19 09:15 Received: 07/11/19 13:31 Matrix: Water
Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual
1631E Mercury,Low Level Analytical Method:EPA 1631E Preparation Method:EPA 1631E
Mercury 0.976 ng/L 0.50 1 07/23/19 13:00 07/25/19 12:51 7439-97-6
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced,except in full,
Date:07/26/2019 09:59 AM without the written consent of Pace Analytical Services,LLC. Page 4 of 11

Pace Analytical Services,LLC
•
aceAnalytical 9800 Kincey Ave. Suite100
/. ® Huntersville,NC 28078078
www.pacelabs.com
[phone]
ANALYTICAL RESULTS
Project: CC11263
Pace Project No.: 92436414
Sample: LLHG BLANK Lab ID: 92436414002 Collected: 07/10/19 09:15 Received: 07/11/19 13:31 Matrix: Water
Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual
1631E Mercury,Low Level Analytical Method:EPA 1631E Preparation Method:EPA 1631E
Mercury ND ng/L 0.50 1 07/23/19 13:00 07/25/19 11:57 7439-97-6
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced,except in full,
Date:07/26/2019 09:59 AM without the written consent of Pace Analytical Services,LLC. Page 5 of 11

Pace Analytical Services,LLC
aceAnalytical® 9800 Kincey Ave. Suite 100
Huntersville,NC 28078
www.pacelabs.com [phone]
QUALITY CONTROL DATA
Project: CC11263
Pace Project No.: 92436414
QC Batch: 487713 Analysis Method: EPA 1631E
QC Batch Method: EPA 1631E Analysis Description: 1631E Mercury,Low Level
Associated Lab Samples: 92436414001,92436414002
METHOD BLANK: 2633271 Matrix: Water
Associated Lab Samples: 92436414001,92436414002
Blank Reporting
Parameter Units Result Limit Analyzed Qualifiers
Mercury ng/L ND 0.50 07/25/19 10:33
METHOD BLANK: 2633272 Matrix: Water
Associated Lab Samples: 92436414001,92436414002
Blank Reporting
Parameter Units Result Limit Analyzed Qualifiers
Mercury ng/L ND 0.50 07/25/19 11:27
METHOD BLANK: 2633273 Matrix: Water
Associated Lab Samples: 92436414001,92436414002
Blank Reporting
Parameter Units Result Limit Analyzed Qualifiers
Mercury ng/L ND 0.50 07/25/19 12:43
LABORATORY CONTROL SAMPLE: 2633274
Spike LCS LCS %Rec
Parameter Units Conc. Result %Rec Limits Qualifiers
Mercury ng/L 5 5.54 111 80-120
MATRIX SPIKE&MATRIX SPIKE DUPLICATE: 2633275 2633276
MS MSD
92436414001 Spike Spike MS MSD MS MSD %Rec
Parameter Units Result Conc. Conc. Result Result %Rec %Rec Limits RPD Qual
Mercury ng/L 0.976 25 25 28.5 29.8 110 115 71-125 4
MATRIX SPIKE&MATRIX SPIKE DUPLICATE: 2633277 2633278
MS MSD
92436416001 Spike Spike MS MSD MS MSD %Rec
Parameter Units Result Conc. Conc. Result Result %Rec %Rec Limits RPD Qual
Mercury ng/L 18.4 125 125 166 171 118 122 71-125 3
Results presented on this page are in the units indicated by the"Units"column except where an alternate unit Is presented to the right of the result.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced,except in full,
Date:07/26/2019 09:59 AM without the written consent of Pace Analytical Services,LLC. Page 6 of 11

Pace Analytical Services,LLC
® 9800 Kincey Ave. Suite 100
c1GEAnalyticcal Huntersville,NC 28078
www.pacelabs.com [phone]
QUALIFIERS
Project: CC11263
Pace Project No.: 92436414
DEFINITIONS
DF-Dilution Factor,if reported,represents the factor applied to the reported data due to dilution of the sample aliquot.
ND-Not Detected at or above adjusted reporting limit.
TNTC-Too Numerous To Count
J-Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
MDL-Adjusted Method Detection Limit.
PQL-Practical Quantitation Limit.
RL-Reporting Limit-The lowest concentration value that meets project requirements for quantitative data with known precision and
bias for a specific analyte in a specific matrix.
S-Surrogate
1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270.The result for each analyte is
a combined concentration.
Consistent with EPA guidelines,unrounded data are displayed and have been used to calculate%recovery and RPD values.
LCS(D)-Laboratory Control Sample(Duplicate)
MS(D)-Matrix Spike(Duplicate)
DUP-Sample Duplicate
RPD-Relative Percent Difference
NC-Not Calculable.
SG-Silica Gel-Clean-Up
U-Indicates the compound was analyzed for,but not detected.
Acid preservation may not be appropriate for 2 Chloroethylvinyl ether.
A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA
Method 8260.
N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for
each analyte is a combined concentration.
Pace Analytical is TNI accredited.Contact your Pace PM for the current list of accredited analytes.
TNI-The NELAC Institute.
LABORATORIES
PAST-A Pace Analytical Services-Asheville
REPORT OF LABORATORY ANALYSIS
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Date:07/26/2019 09:59 AM without the written consent of Pace Analytical Services,LLC. Page 7 of 11

Pace Analytical Services,LLC
aceAnalytical 9800 Kincey Ave. Suite100
Huntersville,NC 28078078
www.pacelabs.com
[phone]
QUALITY CONTROL DATA CROSS REFERENCE TABLE
Project: CC11263
Pace Project No.: 92436414
Analytical
Lab ID Sample ID QC Batch Method QC Batch Analytical Method Batch
92436414001 EFFLUENT EPA 1631E 487713 EPA 1631E 488147
92436414002 LLHG BLANK EPA 1631E 487713 EPA 1631E 488147
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced,except in full,
Date:07/26/2019 09:59 AM without the written consent of Pace Analytical Services,LLC. Page 8 of 11

�� Document Name: ' Document Revised:February 7,2018
/—„/el,/ Sample Condition Upan Receipt(SCUR) Page 1 of 2
f°a y" Document No,: Issuing Authority:
F-CAR-CS-033-Rev.06 Pace Carolinas Quality Office
Laboratory receiving samples:
Asheville❑ Eden❑ Greenwood❑ Huntersville❑ Raleigh[( Mechanicsville❑
'.Sample Condition. •.- Client Name: W0# : 92436414
r . Upon Receipt:;, E c) Project ff:
Courier: ❑F d Ex jUPS ❑LISPS ['Client 111111❑Commercial ace ['Other: ii III 11111111 III
92436414
Custody Seal Present? ['Yes Zo Seals Intact? Oyes ONo ��r��ip
Date/Initials Person Examining Contents '7 1
Packing Material: ['Bubble Wrap • ['Bubble Bags Erfrione ❑ Other Biological Tissue ozen?
Thermometer: ❑Yes ❑No N/A
[]IR Gun IDQ� CC 'Type of Ice: - ['Blue �e
1 l� =� !VI 1
Cooler Temp('C): ICI-d Correction Factor:Add/Subtract(°C) —0,,
IQ ' Temp should be above freezing to 6'C
Cooler Temp Corrected(CC): - DSamples out of temp criteria.Samples of Ice,cooling process
has begun
USDA Regulated Soil (12/N/A,water sample)
Did samples originate in a quarantine zone within the United States:CA,NY,or SC(check maps)? Dld samples originate from a Foreign source(internationally,
DYes ONo Indudlrg Hawaii and Puerto Rico)?DYes DNo
Comments/Discrepancy:
Chain of Custody Present? ' [�YesQNo ❑N/A 1.
Samples Arrived within Hold Time? ?es ONo DN/A 2,
Short Hold Time Analysis(<72 hr.)? DYes 'o DN/A 3.
Rush Turn Around Time Requested? Dyes lls o ON/A 4. •
Sufficient Volume? �es D . ON/A S.
Correct Containers Used? ( Yes Ohio ON/A 6.
-Pace Containers Used? (7�Yes JNo ON/A
Containers Intact? ,,� 5 Yes DNo ON/A _7.
•
Dissolved analysis:Samples Field Filtered? -`ti'}(y�l� Yes ❑No ErN/A 8.
Sample Labels Match COC? 1 Dyes DNo ON/A 9.
\
-includes Date/Time/ID/Analysis Matrix: NM
Headspace In VOA Vials(>5-6mm)? Dyes DNa GN A 10.
Trip Blank Present? DYes DNo N/A 11.
Trip Blank Custody Seals Present? Dyes [No LAN/A
COMMENTS/SAMPLE DISCREPANCY Field Data Required? Dyes ❑No
•
Lot ID of split containers:
CLIENT NOTIFICATION/RESOLUTION
Person contacted: Date/Time;
Project Manager SCURF Review: Pj Date: 4- ill 1
Project Manager SRF Review: 0411 Date: q-'1(% i 4 Page 9 of 11
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SUBCONTRACT ORDER
ENCO Cary
CC11263
SENDING LABORATORY; RECEIVING LABORATORY:
ENCO Cary Pace Analytical(Huntersville NC)
102-A Woodwinds Industrial Court 9800 Kincey Ave.Suite 100
Cary,NC 27511 Huntersville,NC 28078
Phone:[phone] Phone:[phone]
Fax:[phone] Fax:()-
Project Manager: Stephanie Franz Project State of Origin: North Carolina
Sub Lab ID Originating Lab ID Client Matrix Date Sampled Sample Comments
6.'LM) k \ Effluent Waste Water 10-Ju1-19 09:15
Mercury Total EPA 1631 19-Jul-19 15:00 07-Aug-19 09:15
Containers Supplied:
LowLevelHG(N)
Sub Lab ID Originating Lab ID Client Matrix Date Sampled Sample Comments
CVL./L n6 I 1'(- l ow Level Mercury Blank Waste Water 10-Jul-19 09:15
.i • .;..: .. :,....':.1 .._. .I.I. I . ..II. .. ..... .• ......1 .... ,. I _...... .. ....I .1
Mercury Total EPA 1631 19-Jul-19 15:00 07-Aug-19 09:15
Containers Supplied:
LowLevelHG(A)
,ct t 0\
7 1, co
C iz4g
Released By )?ate ce ed By 11 J++11 f Date� 1�[
.fivr� '/ll1l s cc r t �1�1 1 J N
ase IIy Date Re ve y Date
Page 1 Poace rr 11 of 11

RECEIVED
v McIQMM&CREED OCT 0 8 2019
v
NCDEQIDWRINPDES
Chatham Park
Decentralized Water Resource Recovery Facility (WRRF)
Preliminary Basis of Design Report
Revision 7: July 31, 2019 (Updated September 25, 2019)
Introduction
This report is written to establish the Basis of Design for the construction of the
Chatham Park Decentralized Water Resource Recovery Facility(WRRF)to serve the
initial stages of development at Chatham Park North Village and other areas of Pittsboro
that will be tributary to the WRRF.The initial design capacity of the WRRF is 500,000
GPD (consisting of two parallel 125,000 GPD treatment trains and one 250,000 GPD
treatment train)with proposed future expandability up to 1.0 MGD ADF(by adding an
additional 2 parallel 250,000 GPD treatment trains). The WRRF facility will be a
Membrane Bioreactor(MBR) system designed to primarily treat for Biochemical Oxygen
Demand(BOD),Total Nitrogen (TN) and Total Phosphorous(TP).
The initial 0.5 MGD WRRF will be constructed in two(2)phases. Phase I will consist of
construction of a 0.25 MGD WRRF consisting of two initial 0.125 MGD parallel treatment
trains. Phase II will expand the facility to 0.5 MGD by the addition of a single 0.25 MGD
parallel treatment train. Equipment outlined in this document consists of equipment
installed as part of both Phase I and Phase II improvements. Phasing of equipment has
been included to document bringing the initial facility online with provisions of meeting
future loading conditions.
The plant will be designed to discharge effluent to the existing Town of Pittsboro Water
Reclamation Facility(WRF) and a future 0.75 MGD Town of Pittsboro Updated WWTP
discharge location at Robeson Creek(Outfall No. 1)via a new effluent pump station and
forcemain. In addition,the plant will be designed to provide beneficial reuse quality
effluent to meet future water reuse demands for water supply sustainability.
1

•
A
The Town of Pittsboro,North Carolina has a current National Pollution Discharge
Elimination System(NPDES)permit(NC DEQ permit number NC0020354)for a
combined discharge of 3.22 MGD that allows for two discharge locations,Outfall No. 1
and No. 2.
The NPDES permit is written with a combined Total Maximum Daily Limit(TMDL) on
both outfalls. The TMDL maximum load for TN is 36,202 lbs.per year and the
maximum load for TP is 4,551 lbs. per year.Outfall No. 1 has an additional requirement
limiting total phosphorous discharge to 322 lbs. during the summer period defined as
April 1 to October 31 of each calendar year. As a result,during these seven months of
the year, additional phosphorous will need to be removed by the treatment system.
The Town of Pittsboro has received a modification to their NPDES permit to increase the
discharge capacity to 1.249 MGD at Outfall No. 1.This reduces the capacity at Outfall
No.2 to 1.971 MGD.Although the permitted discharge flow capacity at Outfall No. 1 is
increased, the maximum 322 lbs.of TP allowed to be discharged from April 1 to October
31 of each calendar year will remain the same.Based on this, the approximate TMDLs
for Outfall No. 1 and Outfall No.2 are summarized in Table 1.
Table 1—NPDES Permit Total Outfall TMDL Sunm ar y
Parameter Outfall No. 1 Outfall No. 2
Maximum Day Capacity.,. 1.249 MGD 1.971 MGD
Total Nitrogen (TN) 14,042 lbs/yr 22,160 lbs/yr
Total Phosphorus(TP) 1,765 lbs/yr 2,786 lbs/yr
TP April to October 322 lbs/yr NA
The TN and TP allocation for Outfall No. 1 into Robeson Creek will be divided between
a future 0.75 MGD Town of Pittsboro Updated WWTP and the proposed 0.499 MGD
Decentralized WRRF.To maintain consistent effluent limits for the two plants the
approximate TN and TP allocations for each plant are summarized in Table 2.
Table 2—TN and TP Allocations at Outfall No. 1
Parameter Pittsboro WWTP/WRF Decentralized WRRF
Maximum Day Capacity' 0.75 MGD 0.499 MGD
Total Nitrogen (TN) 8,432 lbs/yr 5,610 lbs/yr
Total Phosphorus(TP) 1,060 lbs/yr 705 lbs/yr
TP April to October 193 lbs 129 lbs
1:Maximum Day Capacity calculated over 24-hour period
2

Design Influent Characteristics
The proposed design influent wastewater characteristics for the Decentralized WRRF are
summarized in Table 3. The design is based on raw influent wastewater that is
biodegradable with no toxic compounds present. Additionally,influent Fats, Oils and
Grease(FOG)shall always be less than 100 mg/L.There shall also be approximately 120
mg/L of alkalinity available to avoid pH depressions. The influent Chemical Oxygen
Demand and Five-Day Biochemical Oxygen Demand (COD/BOD5) ratio shall be
between 1.7 and 2.3. Additionally,it is assumed that BOD and TN is not recalcitrant in
concentrations over the permit limits.
Table 3—Design Influent Wastewater Characteristics, Initial Stages
Parameter Initial Design Future
Maximum Day Flow' 1.0 MGD 2.0 MGD
Average Day Flow 0.50 MGD 1.0 MGD
Peak Hourly Flow 1.25 MGD 2.5 MGD
TP 8 mg/L 8 mg/L
BODE 250 mg/L 250 mg/L
Total Suspended Solids (TSS) 260 mg/L 260 mg/L
TN 50 mg/L-N 50 mg/L-N
Ammonia 35 mg/L-N 35 mg/L-N
TP 8 mg/L-P 8 mg/L-P
Alkalinity (as CaCO3) 120 mg/L 120 mg/L
1:Maximum Day Capacity calculated over 24-hour period
Effluent Limits (Outfall No. 1)
Effluent limits for direct discharge from the Decentralized WRRF at Robeson Creek
through Outfall No. 1 shall meet standards as summarized in Table 4.
3

Table 4—WRRF Design Effluent Discharge Limits
Parameter Monthly Average Daily Maximum
Maximum Day Flow' 1.0 MGD 2.0 MGD
BOD5 <5 mg/L < 10 mg/L
TSS <5 mg/L <10 mg/L
Ammonia < 1 mg/L-N <2 mg/L-N
TN <3.69 mg/L-N NA
TP (Apr-Oct) <0.145 mg/L-P NA
TP <0.464 mg/L-P NA
Fecal Coliform <3/100 mL (geo. mean) <25/ 100 mL
pH 6-9 Units 6-9 Units
Dissolved Oxygen >6 mg/L >6 mg/L
Turbidity <5 NTU
1: Maximum Day Capacity calculated over 24-hour period
Effluent Limits for Reclaimed Water
The effluent limits in Table 4 meet the requirements for direct discharge of the effluent
from the Decentralized WRRF to Robeson Creek at the location of the Town of
Pittsboro's Outfall No. 1.As the North Village Development expands,the WRRF will
provide reclaimed water for reuse within the distribution system. This will decrease the
flow discharged from the Decentralized WRRF to Robeson Creek. Additional
disinfection will be required of the treated water in order to meet North Carolina Type 2
reclaimed water standards as defined by 15 NCAC 02U .0401. These design
requirements,which only apply to reclaim water(RCW)include the following:
1. Continuous online monitoring and recording for turbidity and flow
2. A control system to divert flow from the RCW system to Outfall No. 1 if either
the turbidity exceeds 10 NTU or permitted pathogen levels cannot be met.
3. Automatic standby power supply
4. Dual disinfection consisting of UV Disinfection and chlorination
5. The process shall provide for a combined disinfection capable of the following:
a. Log 6 or greater reduction of E.coli
b. Log 5 or greater reduction of Coliphage
c. Log 4 or greater reduction of Clostridium perfringens
6. Maximum pathogen counts depicted in Table 5
4

Table 5—Additional Type 2 RCW Maximum Pathogen Count
Parameter Monthly Average Daily Maximum
Coliphage <5/100 mL (geometric mean) <25/100 ml
Clostridium perfringens <5/100 mL (geometric mean) <25/100 ml
Project Equipment
The initial construction of the WRRF has been coordinated to allow operation of the
facility with a capacity of up to 0.5 MGD ADF as outlined in Phases I and II with
provisions on some structures to expand in the future to meet a buildout flow condition
of 1.0 MGD ADF. However,currently there is no loading to the collection system.
Loading will increase over time as development within the Chatham Park North Village
Development and other areas tributary to the WRRF expands with initial flows to the
WRRF quite low. To accommodate the low flow startup conditions,jockey equipment is
being installed on certain facilities at the time of initial construction. Provisions have
been made to replace jockey equipment with full sized equipment as flow/loading rates
increase at the facility with minimal infrastructure modifications to meet redundancy
requirements for Phase II. The following jockey systems are being provided at this time:
1. Influent Jockey Pump—a single submersible jockey pump will be provided to
manage low turndown and startup flow conditions at the WRRF. All electrical
and mechanical facilities have been coordinated to allow for removal and
replacement with a full-sized pump as loading rates increase to the facility.
2. Aerobic Jockey Blower—a single jockey blower will be provided to manage low
loading conditions at the time of startup at the WRRF. All electrical and
mechanical facilities have been coordinated to allow for removal and
replacement with a full-sized blower as loading rates increase to the facility.
3. Effluent Pumps—a single submersible jockey pump will be provided to manage
low turndown and startup flow conditions at the WRRF. All electrical and
mechanical facilities have been coordinated to allow for removal and
replacement with a full-sized pump as loading rates increase to the facility.
4. RCW Pump—a single jockey pump will be provided to manage initial low RCW
demands and plant water demands during the initial startup phase of the WRRF
and expansion of the Chatham Park NPW distribution system/users. All
electrical and mechanical facilities have been coordinated to allow for removal
and replacement with a full-sized RCW pump as RCW demands increase at the
WRRF and within the Chatham Park RCW distribution system.
5

Headworks
The headworks system will be installed ahead of the influent pump station to provide
screening of the raw wastewater entering the plant.An influent three-way splitter box
with manually adjustable slide gates will split the influent flow to the screen channels.
Two(2)mechanical screens will be installed during the initial phase of the project to
meet Phase I and II requirements while the third screen will be installed in the future as
part of the 1.0 MGD facility buildout.The headworks screen channels will consist of
concrete channels each approximately 18 inches wide with the bottom of the screen
channel being approximately 16 feet below grade.
Screening prior to the biological treatment system is required to remove large solids,
rags,and particles larger than 2 mm size.The proposed headworks system includes two
(2)automatic fine screens each with a design capacity of 870 gpm(1.25 MGD). This will
provide 100%redundancy of the screening equipment for Phases I and II. Space will be
provided to install a third screen in the future to allow for a 3 x 50%redundancy for the
future 1.0 MGD ADF facility.
The screening equipment will be provided with a conveyor to remove solids off the
screens,a compactor to reduce solids volume, and dumpster for collection of solids.A
packaged odor control system will be installed on vents to provide odor control for the
headworks and influent pump station.Design for the headworks system is summarized
in Table 6.
Table 6—Headworks Design Summary
E.ui.ment Phase I Phase II
Fine Screen
Washer/Compactor 1 0
Screw Conveyor 1 0 IIIIII
Odor Control System 1 0
Influent Pump Station and Splitter Boxes
The influent pump station is designed to convey screened wastewater from the
headworks system by force main to a splitter box which will distribute flow to the MBR
trains. Initially the splitter box will include four(4)weir gates for flow splitting with
one(1)gate splitting flow for each 0.125 MGD train installed in Phase I and two(2)gates
splitting flow into the 0.25 MGD train installed in Phase II. Each gate will be 3 feet wide
and allow for even splitting of flow between all trains.
6

The proposed influent pump station consists of a precast concrete wetwell with lockable
aluminum access hatch. Three rail mounted submersible wastewater pumps,each with
Variable Frequency Drive (VFD)control,will be installed in the pump station. For
Phase I,two pumps will be 434 gpm each in capacity while the third pump will be a low
flow startup jockey pump as noted above. As flow increases after the startup of the
WRRF,the jockey pump will be removed and replaced with another 434 gpm pump to
meet redundancy requirements for the 0.5 MGD ADF WRRF. In the future, the existing
pumps will be replaced with three 868 gpm pumps to provide 3 x 50%redundancy for
conveyance of future peak flows as high as 2.5 MGD for the 1.0 MGD ADF facility.
Downstream from the pump station will be a precast concrete valve vault and meter
vault. This vault will include check valves,shut off valves,pressure gauges, and
g g
interconnecting piping. Following the valve vault, a meter vault will house the
magnetic flow meter which will record trends in pump flow and totalize daily volume of
wastewater pumped. Above ground by the pump station a NEMA 4X control panel will
contain electrical components, VFDs, pump controls,and support for instrumentation.
Design parameters for the influent pump station are summarized in Table 7.
Table 7-Influent Pump Station Design Summary
Equipment Phase I Phase II
Influent Pumps 2 full 3 full
1 jockey
Membrane Bio Reactor(MBR) System
The basis of design for the biological treatment MBR System is a NEOSEP MBR system
provided by Kruger. The proposed MBR System is comprised of two(2)0.125 MGD
biological MBR treatment trains having a total average design capacity of 0.25 MGD for
Phase I and one(1)0.25 MGD biological MBR treatment train for a total treatment
capacity of 0.5 MGD ADF for Phase II. The peak hour flow capacity of the two MBR
trains in Phase I is 0.625 MGD and 1.25 MGD for all three trains in Phase II.
Each train is configured with one anaerobic reactor, one pre-anoxic reactor, one aerobic
reactor,and one post-anoxic reactor. Each train will discharge into a common
intermediate channel equipped with intermediate screening prior to flowing into two
membrane micro-filter tanks with one membrane unit in each tank.Air will be added in
the aerobic reactor for nitrification and BOD removal. Air scour will be added in each
membrane tank to enhance effluent dissolved oxygen and to reduce fouling of the
membranes. TN will be removed by biological denitrification which will occur in the
post-anoxic zone and by recycling flow from the aerobic zone to the pre-anoxic zone via
a nitrate recycle pump. BOD will be removed by conversion to CO2 gas and biomass
7

which will be removed as waste activated sludge(WAS). Total nitrogen will be
removed through the nitrification/denitrification process.
Phosphorus removal will be accomplished by luxury biological phosphorus uptake
initiated in the anaerobic selector zones and taken up in the pre-anoxic reactors.
Additional total phosphorus can be removed to meet the low TP limits indicated above
by chemical addition using alum,which will be added in proportion to flow to the
aerobic zones. Phosphorus either accumulated in the biomass or chemically precipitated
with aluminum will be separated from the effluent by the membranes and removed
from the system as waste activated sludge.
To prevent the decrease in alkalinity and resulting depression of pH due to nitrification,
sodium hydroxide will be fed to the pre-anoxic reactors.The sodium hydroxide feed
will be controlled via a pH analyzer in each aerobic reactor with dedicated control
loops/chemical feed pumps. Supplemental carbon will be provided to the inlet of the
Post-Anoxic Zones to assist with total nitrogen removal.
The anaerobic basins,pre-anoxic basins and post anoxic basins all contain 1.8 HP mixers
designed to keep solids suspended and the tanks well mixed. The aerobic reactors and
membrane tanks are mixed with fine bubble diffusers and coarse bubble diffusers,
respectively. The diffusers in the aerobic tanks are fed by a system of blowers located in
the mechanical building. The blowers consist of two (2)full sized blowers rated at 303
SCFM each to meet redundancy requirements and one(1)jockey blower package for
startup conditions during Phase I. The jockey blower will eventually be replaced with a
full-sized blower package to meet redundancy requirements of Phase II as indicated
above. The membrane tanks are aerated by a pair of blower packages rated for 924
SCFM each installed during Phase Ito provide for redundancy. Blowers are sized for
Phase II.
Once flow reaches the splitter box,wastewater will flow by gravity through the train
until it reaches the MBR Tanks. After leaving the treatment trains,the flow will pass
through intermediate screening to remove any large solids which can damage the
membranes. The intermediate screening will consist of a single mechanical screen rated
for 2,256 gpm for peak flows during Phase II. The mechanical screen will be equipped
with a screw conveyor and screw washer/compactor with a bagger system. A manual
bar screen will be provided for equipment redundancy.
As flow enters the membrane tanks it will either overflow into a RAS/WAS wetwell tank
or be pulled through the membranes as cleaned effluent for disinfection. Permeate
pumps will be required to draw water through the membranes and direct it to the
permeate tank before the flow continues to the disinfection process. Permeate pumps
8

are rated at 868 gpm each and are sized for Phase II with a shelf spare provided for
redundancy.
The membranes installed during Phase I will include two membrane tanks in parallel for
redundancy requirements. To meet redundancy requirements under Phase II flow
conditions,additional membrane modules will be added to the membrane system
installed in Phase I. The membranes themselves will require periodic cleaning which
will be done in place. This will be accomplished by reversing the permeated pumps and
drawing water from the permeate holding tank back through the membranes. Added to
the reversed flow will be sodium hypochlorite and/or citric acid as a membrane cleaning
agent.
Recycled Activated Sludge/Waste Activated Sludge(RAS/WAS)Pumps rated at 694
gpm each will draw solids from an overflow tank downstream of the membrane tanks.
Solids from the membrane overflow will be returned to the head of the MBR train at the
splitter box as RAS. Solids will be periodically removed from the MBR system as WAS
by a control valve which will direct flow from the RAS/WAS pumps to the sludge
holding tank. The sludge holding tank will be aerated to maintain aerobic conditions
and allow for reducing the volume of volatile solids.
Due to the location of the treatment facility,a packaged odor control system has been
included as part of the secondary treatment process to minimize odors at the WRRF.
The odor control system has been sized to provide odor control for equipment installed
in Phases I and II.
General design parameters for the MBR system are summarized in Tables 8 through 11.
9

Table 8—Bioreactor Equipment
Equipment Phase I Phase II
Biological Trains 2 trains(0.125 MGD 1 train(0.25 MGD)
each)
Anaerobic Zone Mixers 2 (1 in each train) 1 in additional
train
Pre-Anoxic Mixers 2(1 in each train) 1 in additional
train
Nitrate Recycle Pump 2 (1 in each train) 1 in additional
train
Fine Bubble Diffusers 2 (1 in each aerobic 1 in additional
tank) train
Aerobic Blowers 2 Full 3 Full
I Jockey
Post-Anoxic Zone Mixer 2 (1 in each train) 1 in additional
train
Odor Control System 1 0
Table 9—Intermediate Screening Channel Equipment
Equipment Phase I Phase II
Mechanical Screen 1 0
Manual Bar Screen 1 0
Screw Conveyor 1 0
Screw Washer/Compactor 1 0
Table 10—MBR Equipment
Equipment Phase I Phase II
Scum Skimmer 0 1
Scum Pump Station 0 1
MBR Tanks 2 0
Membrane Modules 2 Add additional
membranes to
existing modules
Membrane Diffusers 2 0
Membrane Blowers 2 0
Permeate Pumps 2 installed 1 shelf spare 0
Permeate Tank 1 0
Table 11 —RAS/WAS Pump Equipment
Equipment Phase I Phase II
RAS/WAS Pumps 2 1 additional
IO

Disinfection System
Once flow has passed through the membranes via the permeate pumps, flow will
be directed Y
a through system of closed-vessel UV modules for disinfection. The
g
UV modules have been designed for a capacity of 0.625 MGD peak flow through
each bank. Two (2)banks will be installed to meet Phase I requirements with
one (1)bank serving as a redundant unit. During Phase II, an additional UV
bank will be added to meet peak disinfection requirements for Phase II with one
(1)bank out of service.
Table 12—UV Disinfection Equipment
Equipment Phase I Phase II
UV Banks 2 1
Flow which is directed to the RCW storage tank will receive dual disinfection via
chlorination. Liquid chlorine will be injected into the RCW downstream of the
UV system to meet residual requirements. The RCW tank has been designed to
achieve minimum contact time requirements for Type 2 RCW.
Effluent Pump Station
Flow which will not be sent to the RCW storage tank will be directed to an effluent
pump station. The effluent pump station is designed to convey treated effluent through
a force main to Outfall No.1 for discharge or redistribution as reclaimed water to 3M via
the RCW distribution system at the Pittsboro WRF.The proposed effluent pump station
consists of a precast concrete wet well with lockable aluminum access hatch and three
rail mounted submersible wastewater pumps with VFD control. Initially two effluent
pumps rated for 434 gpm and an effluent jockey pump will be provided.
Downstream from the pump station will be a precast concrete valve vault and meter
vault. This vault will include check valves, shut off valves,pressure gauges, and
interconnecting piping. Following the valve vault, a meter vault will house the
magnetic flow meter which will record trends in pump flow and totalize daily volume of
treated wastewater pumped. Above ground by the pump station a NEMA 4X control
panel will contain electrical components, VFDs, pump controls,and support for
instrumentation. Design parameters for the effluent pump station are summarized in
Table 13.
11

Table 13—Effluent Pump Station Equipment
Equipment Phase I Phase II
Effluent Pumps 2 Full 3 Full
1 Jockey
Reclaimed Water(RCW) Storage and Pump Station
Effluent from the system which is not pumped to Outfall No. 1 will be sent to the
Reclaimed Water(RCW)Storage tank. With the addition of sodium hypochlorite to
provide dual disinfection,the effluent from the MBR system is acceptable for reuse in
many applications including heating and cooling system make-up water,toilet flush
water, irrigation and many industrial and commercial applications.In addition,the
RCW system is designed to meet the needs for general wash down water,screen system
spray washers and site irrigation at the WRRF.
The RCW Storage Tank will provide approximately 100,000 gallons of storage in the
form of an above ground, round storage tank. The RCW Storage tank will provide
contact time for chlorination in order to obtain the necessary disinfection contact time to
achieve Type 2 reclaim water standards. Pumps will draw from the RCW Storage tank
to pressurize the plant non-potable system and deliver water to the RCW distribution
system. Two(2)434 gpm pumps and one(1)jockey RCW pump will provide for Phase I
and Phase II.
Table 14—RCW System Equipment
Equipment Phase I Phase II
RCW Storage Tank 100,000 gallons 0
RCW Pumps 2 Full 0
1 Jockey
Downstream from each pump will be check valves and shut off valves. The combined
discharge header will include a pressure indicating transmitter and control valves for
the RCW distribution system or to return the flow back to the RCW tank if discharge to
the RCW distribution system is low.
Most users of the RCW distribution system will not have alternate means,nor will they
have controls,to operate in the event that RCW is not available. Therefore,in the event
the WRRF cannot fill the RCW tank, a potable fill line has been provided with an air gap
to supplement these water users.
12

Provisions have been made to allow for upsizing the RCW pumps in the future as the
demand for RCW increases within the RCW distribution system.
Waste Activated Sludge (WAS)Holding Tank
The sludge holding tank has been designed to meet the required capacity to hold the
sludge generated from the 0.5 MGD WRRF commissioned under Phase II. A second
sludge holding tank will be constructed in the future to accommodate the additional
sludge generated at build out by the 1.0 MGD WRRF. Each WAS holding tank will
include two positive displacement blower packages and coarse bubble diffusers. A
sludge pump will transfer solids from the sludge holding tank to a truck loading station
to be taken offsite for additional treatment/disposal.
The WAS holding tanks are sized to provide approximately 30 days sludge storage
capacity at 0.5 MGD of average plant flow with one tank and 1.0 MGD of average plant
flow with two tanks.
Duplex positive displacement(PD)blowers rated at 550 SCFM each and coarse bubble
diffusers will be provided for aeration to maintain DO concentrations in the tanks and
keep the tanks well mixed.Decanters will be provided to remove supernatant water
above the solids which will be return to the influent pump station for treatment.
Trucks will be used for removing solids from the WAS holding tanks. A truck loading
station,including a curbed area for spill containment,will be provided at the WAS
holding tank. A positive displacement solids pump rated at 250 gpm will pull solids
from the WAS holding tank and convey to a truck for transport. This will allow solids to
be hauled by a licensed contractor to an approved location for sludge
treatment/disposal.
To minimize odors at the WAS holding tank, the tank has been equipped with a
packaged odor control system.Design of the WAS holding tank system is summarized
in Table 15.
Table 15-WAS Holding Tank Equipment
Equipment Phase I Phase II
WAS Tank 1 0
Blowers 2 0
Sludge Pumps 1 0
Odor Control System 1 0
73

Chemical Feed Systems
The MBR system is designed to provide effluent TN concentrations less than 3.69 mg/L
and TP concentrations less than 0.145 mg/L as shown in Table 4 above. To achieve the
require low effluent TN and TP limits,chemical addition will be required. In addition,
chemical addition will be required to maintain a disinfection residual in the generated
RCW and also to provide for chemical cleaning of the membranes installed as part of the
MBR process.
Each system requiring bulk chemical feed tanks will include sufficient volume to receive
a full 4,000-gallon truck of chemical assuming that 15 days' worth of chemical remain in
the chemical storage tank. If the chemical being stored degrades or is substantially less
than a full truck load,the tanks may be sized to receive half truckloads of chemicals
while still holding 15 days'worth of chemical. Totes and barrels will be used in
applications where smaller volumes of chemicals will be required. The totes and barrels
will be located and sized so that a full tote or barrel can be placed next to the barrel or
tote currently in use. Tanks and piping will be heated and insulated to the design
requirements of the chemicals being contained. Totes or barrels will receive heat
blankets to prevent freezing and protect from precipitation when required.
All chemicals will be stored in a concrete containment area designed to contain 110%of
the largest storage tank capacity with 6 inches of freeboard to accommodate any rainfall.
Containment areas will be specific for each chemical being stored to prevent any
potential contact and reactions of chemicals should a leak occur.
The operating pH of the bioreactors must be maintained at greater than a pH of 7.2 to
avoid inhibiting the nitrification reaction rate.Also, the nitrification process consumes
about 7.14 mg/L of alkalinity as CaCO3 for each 1.0 mg/L of ammonia nitrified.
Therefore, alkalinity addition with sodium hydroxide will be provided to optimize the
nitrification process. Two(2)peristaltic chemical feed pumps will feed NaOH to the
influent channel ahead of the MBR process during Phase Ito meet redundancy
requirements. An additional chemical feed pump will be added in Phase II to meet
chemical dosing demands. The feed rate of sodium hydroxide will be controlled based
on a pH analyzer in the aerobic zones in each train. The design of the sodium hydroxide
feed system is summarized in Table 16.
Table 16—Sodium Hydroxide Chemical Feed System Equipment
Equipment Phase I Phase II
NaOH Feed Pumps 2 1
14

The denitrification process is an anoxic biological process that reduces the nitrate
produced in the aerobic biological process to nitrogen gas. To optimize the
denitrification process it will be required to provide a supplemental carbon feed system
consisting of dedicated peristaltic chemical feed pumps with a single pump feeding to
the post-anoxic zones of each treatment train as residual BOD is likely not sufficient to
allow for complete denitrification. During Phase I, three(3)chemical feed pumps will
be provided to feed each train with one serving as a spare. In Phase II, an additional
chemical feed pump will be added to feed the 0.25 MGD train. The carbon feed system
will provide additional BOD to supplement biological metabolic processes and allow
nitrate to be effectively reduced to nitrogen gas to meet effluent TN limits. In addition,
the redundant peristaltic chemical feed pump will be set up during low-loading, startup
conditions to feed carbon into the inlet splitter box as a seeding source for startup.The
carbon source chemical feed will be flow paced based on the flow into the reactors and
the measured residual nitrate coming out of the aerobic zone. The design of the carbon
feed system is summarized in Table 17.
Table 17—Supplemental Carbon Chemical Feed System Equipment
Equipment Phase I Phase II
Carbon Feed Pumps 3
The primary means for reduction of total phosphorus is luxury biological uptake.
However, to meet the proposed effluent limits indicated above, additional phosphorus
removal will be required through chemical precipitation using alum and filtration with
the MBR membrane system. The alum feed system will be flow paced based on flow
into the treatment trains. In Phase I, two(2)chemical feed pumps will be provided to
feed to the aerobic zones of each treatment train;one (1)chemical feed pump will be
provided to feed to the supernatant flow coming off of the WAS holding tank which can
be a significant source of TP;and one (1)pump will be provided to serve as a redundant
pump for a total of four(4)chemical feed pumps. In Phase II, an additional chemical
feed pump will be added to feed the aerobic zone in the third train. The design of the
alum feed system for precipitation of phosphorus is summarized in Table 18.
Table 18—Alum Chemical Feed System Equipment
Equipment Phase I Phase II
Alum Feed Pumps 4 1
To meet the requirements for Type 2 Reclaimed Water, the effluent must be provided
with dual disinfection,which will include UV disinfection and chlorination to provide a
residual. The sodium hypochlorite feed system will include two(2)peristaltic chemical
feed pumps with one (1)pump serving as a redundant unit for feeding the RCW
discharge. These pumps will be flow paced based on flow into the RCW Storage Tank.
15

Two(2) additional NaOCI chemical feed pumps will be provided to function as chemical
cleaning pumps for the MBR system. These pumps will dose chlorine to the permeate
being back-fed through the membranes for periodic chemical cleaning as outlined
above. The design of the chlorine feed system for the chlorination of RCW water and
membrane cleaning is summarized in Table 19.
Table 19—NaOCI Chemical Feed System Equipment
Equipment Phase I Phase II
NaOCI Feed Pumps 2 RCW feed 0
2 Membrane Cleaning
In addition to chemically cleaning the membranes with chlorine,the membranes in the
MBR will require periodic cleaning with citric acid. The citric acid system will consist of
one (1) chemical feed pump which will draw from drums placed in the chemical storage
area and feed to the membranes at the permeate pumps. Due to the infrequent nature of
chemical cleaning operations and the ability to sufficiently plan for a chemical cleaning
operation,no redundant pump has been provided. The design of the citric acid feed
system for periodic membrane chemical cleaning is summarized in Table 20.
Table 20—Citric Acid Clean in Place System Equipment
Equipment Phase I Phase II
Citric Acid Feed Pump 1 0
16

✓ June 24,2019(Updated September 24,2019)
To: North Carolina Department of Environmental Quality RECEIVED
Attention: Michael S. Regan,Secretary
Linda Culpepper, DWR Director OCT 0'8 2019
Kim Colson, DWI Director NCDEQ/DWR/NPDES
From: Elizabeth C. Goodson, P.E.,Town of Pittsboro Town Engineer
Michael J. Myers, Envirolink, Inc. and Old North State Water Company, LLC
Timothy J. Baldwin, P.E., McKim&Creed, Inc.,consultant to Chatham Park Investors LLC
Re: Request for Verification of DEQ Approvals for Pittsboro Wastewater Management Projects and
Operations
Request
We request, on behalf of the Town of Pittsboro ("Town"), Old North State Water Company ("ONSWC"),
and Chatham Park Investors LLC ("CPI"), DEQ confirmation of all DEQ approvals required for planned
improvements to and operation of wastewater infrastructure that will meet Pittsboro's immediate urgent and
medium-range future wastewater needs and will reduce environmental impacts. The improvements will be
established by several related projects. We request DEQ notify us immediately if this memorandum fails to
identify any required DEQ approval for construction or operation of the improved wastewater management
infrastructure or fails to address any known DEQ concern or question.
Update
Our updates to this memorandum include: clarification of our discussion of wastewater improvements,
projects, and operations; discussion of recent DEQ determinations about indirect, secondary, and cumulative
water quality impacts of the proposed improvements (resolving a prior DEQ concern that has delayed permitting
and loan approval); an update of a summary table to clearly identify actions we think DEQ should take to allow
the proposed/planned projects and operations to proceed without further delay; and a regulatory analysis
confirming that Pittsboro is the correct NPDES permittee for discharges from the Pittsboro WWTP (resolving a
question raised by DEQ personnel).
Background Information
Coordination of projects and approvals probably involves consideration of the following operations,
planned/proposed improvements, and DEQ approvals:
OPERATIONS
Currently permitted operations. Currently, the Pittsboro WWTP is permitted to discharge up to 0.75
MGD to Robeson Creek which is in the Jordan Lake Watershed (NPDES permit NC0020354) and is permitted to
divert up to 0.3 MGD of treated wastewater for reuse (reclaimed water system permit number WQ0024838).
Pittsboro's collection system (permit number WQCS00146, and related collection system extension permits)
currently delivers untreated wastewater to the Pittsboro WWTP. The City of Sanford's WWTP (permit number
NC0024147) currently receives untreated wastewater from Sanford's collection system (permit number
WQCS00047).
Currently permitted future operations. The Pittsboro NPDES permit, conditioned on issuance of ATCs
and receipt of engineer's certifications, authorizes a 1.249 MGD discharge to Robeson Creek (to replace the 0.75

June 24,2019 (Updated September 24,2019)
MGD discharge)and addition of a 1.971 MGD discharge to the Haw River, providing a total permitted wastewater
management capacity of 3.22 MGD.
Planned/proposed operations. The planned operations are the following:
(1) Pittsboro's collection system will divert up to 2 MGD of untreated wastewater to the City of Sanford where
it will be treated and then discharged downstream of the Lake Jordan Watershed and the Haw River. Wet
weather flow equalization for raw wastewater will be provided using infrastructure that is currently part
of the Pittsboro WWTP. This includes use of the existing 0.6 MG equalization tanks and conversion of the
existing treatment tanks to equalization to provide an additional 0.5 MG (total of 1.1 MG). The conversion
will include new equalization pumping to the EQtanks,automated diversion valves,new aeration diffusers
for the converted tanks, and pipe and control changes.
(2) ONSWC will provide treatment services for Pittsboro's WWTP(by pipeline delivery of up to 0.499 MGD of
treated wastewater) and supply reclaimed water to the Town's new reclaimed water distribution system
that will serve properties in the Chatham Park PDD and other areas of Pittsboro. The Pittsboro WWTP
Operator-in-Responsible-Charge ("ORC")will have the following options for handling ONSWC effluent: (1)
treat,sample,and discharge to Robeson Creek;(2)divert to the existing Pittsboro reclaimed water system;
or(3)divert to the Pittsboro-Sanford force main (any time the ORC does not want for any reason to accept
ONSWC effluent).
(3) Pittsboro will discharge treated wastewater to Robeson Creek using a combination of (a) expandable
treatment services provided by ONSWC (by pipeline delivery of up to 0.499 MGD of treated wastewater),
(b) ultraviolet disinfection as may be needed, (c) reaeration (using existing cascade), and (d) sampling for
NPDES permit compliance (using existing sampling device and sampling locations).
(4) Pittsboro's existing reclaimed water system(that serves the 3M plant in Pittsboro)will continue to receive
treated wastewater from the Pittsboro WWTP (which will receive treated wastewater from ONSWC as
described above) and will continue to chlorinate and distribute reclaimed water.
The resulting near-term Pittsboro wastewater management capacity, with all of the planned operations in place,
will be 2.499 MGD. See the attached flow chart (Attachment 1) for a conceptual overview of the
proposed/planned operations. Long-term, Pittsboro's foreseeable wastewater treatment capacity will be 5.22
MGD (2 MGD from Pittsboro-Sanford force main and 3.22 MGD from full implementation of infrastructure
authorized by NPDES permit).
PLANNED/PROPOSED PROJECTS
The improvements to establish the planned/proposed operations will be constructed by the following projects:
• Pittsboro-to-Sanford Force Main and Flow Equalization Facility. Disconnect from the Pittsboro WWTP
the portion of the Pittsboro collection system that is tributary to the existing WWTP headworks. Construct
and connect a 2 MGD force main and pump station that will convey untreated wastewater from the
Pittsboro collection system to the City of Sanford WWTP. Repurpose and convert a portion of the existing
Pittsboro WWTP infrastructure to provide wet weather flow equalization and incorporate the repurposed
infrastructure in the Pittsboro collection system.

A June 24, 2019 (Updated September 24, 2019)
• ONSWC Facility. Construction of the ONSWC wastewater treatment plant ("ONSWC Facility") is nearly
complete under permit number WQC0039375. ONSWC understands DWR intends to modify permit
number WQC0039375 (which currently authorizes construction only) to authorize operation of the
ONSWC Facility. Lines to and from the ONSWC Facility will be owned and operated by Pittsboro as part
of its collection system and are among the proposed improvements discussed below (ONSWC-Pittsboro
Service Line,New Pittsboro Reclaimed Water Distribution System,and ONSWC-to-Force-Main Diversion
Line).
• New Pittsboro Wastewater Collection System Lines to ONSWC. Construct new collection lines as needed
for transmission of untreated wastewater to the ONSWC Facility.
• Updated Pittsboro WWTP. Modify the Pittsboro WWTP to accept treated effluent from ONSWC-Pittsboro
Service Line and discharge to Robeson Creek. The NPDES permit provides for 1.249 MGD to be discharged,
while the actual near-term WWTP discharge is expected to be up to 0.499 MGD based on treatment
capacity available pursuant to the Town's agreement with ONSWC. Facilities for reaeration and sampling
will remain in service. An existing connection from the WWTP to the existing Pittsboro reclaimed water
system (that currently serves the 3M plant in Pittsboro) will continue to be used by Pittsboro to provide
treated wastewater for reuse. Maintaining ownership and operation of the Updated Pittsboro WWTP is
important to the Town of Pittsboro. Additional WWTP infrastructure or increased services from ONSWC
or other provider can be used to bring the Robeson Creek facility's capacity up to its full 1.249 MGD
permitted capacity.
• ONSWC-Pittsboro Service Line. Construct and connect a treated wastewater delivery line from the
ONSWC Facility to the Updated Pittsboro WWTP. The ONSWC-Pittsboro Service Line will include a
connection to a pipeline to the Pittsboro-to-Sanford force main that will allow the Pittsboro WWTP ORC
to divert ONSWC effluent to the Sanford WWTP (instead of being delivered to the Pittsboro WWTP) any
time the ORC does not want, for any reason, to accept ONSWC effluent for further treatment and reuse
or discharge.
• New Pittsboro Reclaimed Water Distribution System. 1 Construct and connect a new reclaimed water
distribution system to receive reclaimed water from the ONSWC Facility and serve properties within the
Chatham Park PDD and other areas within the Town of Pittsboro.
• ONSWC-to-Force-Main Diversion Line. Construct and connect a line from the ONSWC headworks to the
Pittsboro-Sanford Force Main to divert any ONSWC influent not treated by ONSWC.
The owner/operator and the party responsible for construction of each improvement are set forth in the
attached table (Attachment 2).
Points of demarcation that separate responsibility for construction will be determined by Pittsboro, CPI, and
ONSWC.
1 Existing Pittsboro reclaimed water system. No modifications are needed for the existing Pittsboro reclaimed
water system that currently serves an industrial user.

June 24,2019(Updated September 24, 2019)
RESOLUTION OF QUESTIONS ABOUT SECONDARY AND CUMULATIVE IMPACTS OF INCREASING PITTSBORO'S
WASTEWATER MANAGEMENT CAPACITY
Pittsboro's wastewater management capacity will be 2.499 MGD once all of the planned improvements are in
operation. Progress on DEQ approvals of the wastewater improvements has been delayed since May 2018
based on DWR questions about secondary and cumulative impacts ("SCI") (i.e., impacts of development that is
predicted to be served by the wastewater improvements) on water quality. The concerns about SCI are
apparently premised on a theory that wastewater management capacity causes development and by extension
causes the impacts of development. DWR representatives were concerned that current ordinances that
mitigate impacts of development are different than then-existing and then-predicted ordinances identified as
mitigative measures in a 2010 environmental impact statement("EIS")that assessed then-proposed Pittsboro
wastewater improvements. These questions have been resolved. In 2018 and 2019, DWR, the Division of
Energy, Mineral and Land Resources ("DEMLR") and the North Carolina Department of Justice, conducted a
review of State, federal, and local regulations applicable to the Pittsboro wastewater service area (including the
Chatham Park PDD) and made the following determinations:
a. Based on the mitigation provided by measures which are
currently required by Town ordinances including the Master Plan and
Additional Elements, current statutes and regulations, and the
prospective Ordinance Approval(together,the"Mitigation Measures"):
i. With respect to matters within its authority and
jurisdiction relating to water quality, DWR shall not
require or recommend any mitigation measures that are in
addition to or different from the Mitigation Measures with
regard to: (1)the Town's currently pending application for
a low-interest loan administered by DWI for the Force
Main Project; and(2)the Town's NPDES Permit Renewal.
To the extent DWR states or provides any requirement or
recommendation in said DWI and NPDES processes prior
to the Final Approval as defined in section 5(c), such
recommendation or conclusion may be made conditioned
on the Final Approval.
ii. The Mitigation Measures require at least as much
stormwater control and/or buffer width as is required by
current state laws and rules and applicable local
ordinances. The Mitigation Measures adequately address
the reasonably foreseeable indirect, secondary, and
cumulative impacts to water quality associated with: (1)the
existing NPDES Permit and the three stages of permitted
flow set forth therein since 2oi4, as DWR understands
those impacts based on the existing record for that NPDES
Permit, and (2) the Force Main Project and the Town's
NPDES Permit Renewal, as DWR understands those
projects and their impacts as of the date of this Agreement.
See Agreement (between CPI, DWR, and DEMLR and signed by all parties as of May 15, 2019). The "prospective
Ordinance Approval"occurred on June 24,2019,and the "Final Approval"was provided on July 5, 2019. Thus,the
"Mitigation Measures" are sufficient to mitigate SCI for Pittsboro's total wastewater management capacity of at

June 24, 2019(Updated September 24,2019)
least 5.22 MGD (3.22 MGD under the NPDES permit plus 2.0 MGD pursuant to the Pittsboro-to-Sanford force
main.
The "Mitigation Measures" that adequately address impacts identified as SCI are statutes, regulations, and
ordinances. The Mitigation Measures assessed in 2019 are not the same as the statutes, regulations, and
ordinances considered in the 2010 EIS. References to and discussion of statutes, regulations, or ordinances in
Town submittals in support of permit applications and other requests for agency actions are obviously not
intended as and cannot be reasonably characterized or interpreted as commitments by the Town of Pittsboro that
there will be no changes in the statutes, regulations, or ordinances. Federal and State laws and regulations, local
ordinances, and the scientific and technical underpinnings of such laws, regulations, and ordinances will change
over time without violating any commitment or lawful requirement.
Pittsboro ordinances provide more mitigation of alleged SCI than required by State and federal statutes and
regulations. This is a result of local policy decisions, not federal or State mandates. Discussion in submittals to
State and federal agencies of Pittsboro ordinances that provide more mitigation than can be required by State
and federal authorities does not transform such ordinances into State or federal mandates.
RESOLUTION OF RECENT QUESTION REGARDING PERMITTEE FOR THE PITTSBORO WWTP
We understand a question has been raised by DWR personnel regarding the appropriate entity to be the NPDES
permittee for the operation of the Updated Pittsboro WWTP. The Town of Pittsboro is the appropriate entity as
confirmed by the attached regulatory analysis.See Attachment 3.
DEQ APPROVALS
Possible permits,certifications, permit modifications, authorizations to construct ("ATCs"), loan approval,Special
Order by Consent, or other approvals might be required under some or all of the following instruments (and
perhaps others):
• Pittsboro's WWTP NPDES permit
• Pittsboro's reclaimed water generation and distribution permit
• Pittsboro's collection system permit
• ONSWC's reclaimed water generation system permit
• City of Sanford's WWTP NPDES permit
• City of Sanford's collection system permit
• DWI loan approval for financing related to the Pittsboro-Sanford Force Main
• Erosion control plan approvals by the Division of Energy, Minerals and Land Resources
• DWR 401 water quality certifications for USACOE permits if there will be discharges of dredged or fill
material to Waters of the U.S.

June 24,2019(Updated September 24,2019) •
As summarized in Attachment 2,we think the actions to be taken byDEQ toprevent further delayof construction
and operation of the needed wastewater improvements are the following:
• DWR issuance of an ATC and DWI loan approval for the construction of Pittsboro-to-Sanford Force Main
and Flow Equalization Facility.
o Pittsboro is working on an updated Engineering Report and Environmental Information Document
that responds to DEQ comments.
• DWR update of the ONSWC Facility permit to allow operation.
o ONSWC is preparing to submit the request for the update of the permit to authorize operation.
• DWR written confirmation that the permit requirement to obtain an ATC prior to the Town initiating
discharges of up to 1.249 MGD pursuant to the Pittsboro WWTP NPDES permit is satisfied by the
combination of the following: (1) the permit previously issued for construction of the ONSWC-Pittsboro
Service Line and the ONSWC-to-Force-Main Diversion Line (Wastewater Collection System Extension
Permit WQS0040514); and (2) the ATC to be issued for the Pittsboro-to-Sanford Force Main and Flow
Equalization Facility. NOTES: (1) The actual WWTP discharge is expected to be up to 0.499 MGD based
on the Town's current agreement with ONSWC for provision of certain treatment services. (2) The
Pittsboro Operator-in-Responsible Charge will be able to divert to the Pittsboro-to-Sanford Force Main
and Flow Equalization Facility any influent from ONSWC that Pittsboro's ORC does not want to reuse or
discharge.
• DWR update of the Pittsboro NPDES permit to reflect decommissioning of some of the WWTP treatment
infrastructure and connection to and receipt of treated effluent from the ONSWC Facility.
• 401 WQC for the Corps 404 authorization for crossings of Waters of the United States.
o Pittsboro has applied (or will apply)for authorization by the Corps and for the Water Quality
Certification by DEQ for Pittsboro-to-Sanford Force Main and Flow Equalization Facility crossings
of Waters of the United States.
o ONSWC or CPI has applied(or will apply)for authorization by the Corps and for the Water Quality
Certification by DEQ for the ONSWC-Pittsboro Service Line and ONSWC-to-Force-Main Diversion
Line.
• Erosion control plan approvals or written confirmation that these can be issued by Chatham County.
• A Special Order by Consent might be requested by Pittsboro for an interim period when the Pittsboro
WWTP may discharge treated wastewater from both the existing WWTP infrastructure and from the
ONSWC Facility because the NPDES permit limits for discharging up to 1.249 MGD are stricter than the
limits that apply to current WWTP operations that rely on the existing WWTP infrastructure.
We request DEQ's confirmation of the preceding list and request DEQ identify any required DEQ action we have
failed to include in the preceding list.

ATTACHMENT 1
PITTSBORO WASTEWATER MANAGEMENT SYSTEM AFTER PROPOSED IMPROVEMENTS ARE COMPLETE
Orange lines = untreated wastewater(Pittsboro collection system)
Blue lines=treated wastewater(not chlorinated)
Green lines=treated wastewater(chlorinated for reuse as reclaimed water)
New Pittsboro reclaimed
water distribution system
Pittsboro reclaimed
water system •
\\\
•
ONSWC Facility 3M plant in Pittsboro
Pittsboro sewer area
tributary to ONSWC Facility
Pittsboro WWTP Robeson Creek
(Reaeration, sampling)
Pittsboro sewer area
currently tributary to Pittsboro WWTP
Pittsboro pump station Sanford WWTP Big Buffalo Creek
with flow equalization
4824-3953-1421.v3

June 24,2019(Updated September 24, 2019)
ATTACHMENT 2
Construction Owner- Permits that Authorizations to
Project Work System by: operator authorize operation Construct&Loan
Pittsboro-to-Sanford Disconnect from WWTP the portion of Pittsboro Pittsboro collection Pittsboro Pittsboro Pittsboro collection ATC Pending
Force Main collection system tributary to WWTP. Construct 2 MGD system system permit (By DWR through
AND force main and pump station from Pittsboro collection PERCS Unit).
Flow Equalization system to Sanford WWTP.Repurpose and convert (Update to Sanford Loan Approval
Facility portion of Pittsboro WWTP to provide wet weather flow WWTP permit not Pending(by DWI)
equalization. required)
ONSWC Reclaimed
Water Generation ONSWC Reclaimed
ONSWC Facility Construct facility ONSWC facility ONSWC ONSWC System Permit. Water Generation
DWR Nondischarge System Permit
Unit update this
permit for operation
New Pittsboro Construct new collection lines as needed for transmission Wastewater CS
Wastewater of untreated wastewater to the ONSWC Facility. This is Pittsboro collection CPI and other Pittsboro Pittsboro collection Extension Permits
Collection System ongoing and will continue. system developers system permit e.g.,WQ0040741
Lines to ONSWC
Modify Pittsboro WWTP to accept flow from ONSWC and Pittsboro Pittsboro NPDES DWR Written
discharge to Robeson Creek or divert to reuse(or divert permit. confirmation that
Updated Pittsboro to Sanford WWTP). Existing cascade,UV disinfection, (Except CPI or DWR Complex two ATCs(see main
WWTP sampling device and sampling locations will remain. Pittsboro WWTP ONSWC for Pittsboro Permitting Unit to text of memo)meet
Modifications to facilities are covered by ONSWC connection to update permit to ATC requirement for
Wastewater Collection System Extension Permit divert to reflect modifications initiating up-to-1.249
WQS0040514 and the ATC to be issued for the Pittsboro- Sanford to facilities and MGD discharges
to-Sanford Force Main and Flow Equalization Facility. WWTP) operations
Existing Pittsboro No modifications are anticipated. Influent will be from Pittsboro reclaimed Pittsboro reclaimed
Reclaimed Water the Updated Pittsboro WWTP. water generation and N/A Pittsboro water gen.and dist. N/A
System distribution system system permit
ONSWC-Pittsboro Construct treated wastewater delivery line from ONSWC Pittsboro collection CPI or ONSWC Pittsboro collection Wastewater CS
Service Line Facility to Updated Pittsboro WWTP with connection that system Pittsboro system permit Extension Permit
allows diversion to Sanford WWTP. WQS0040514
New Pittsboro Construct reclaimed water distribution system to Pittsboro reclaimed Pittsboro reclaimed Reclaim water line
Reclaimed Water distribute reclaimed water from ONSWC Facility to water generation and CPI and other water gen.and dist. ATCs(e.g.,serial#
Distribution System properties in Pittsboro,including Chatham Park PDD. distribution system _ developers Pittsboro system permit 18-00966)
ONSWC-to-Force- Construct line from ONSWC Facility headworks to Pittsboro collection CPI or ONSWC Pittsboro collection Wastewater CS
Main Diversion Line Pittsboro-to-Sanford Force Main to handle any ONSWC system Pittsboro system permit Extension Permit
Facility influent not treated by ONSWC Facility WQS0040514
NOTE: Erosion control plan approvals are required and 401 WQCs are required for 404 permits.

ATTACHMENT 3
Regulatory analysis for identification of correct NPDES permittee for Pittsboro WWTP
The Town of Pittsboro provides wastewater collection, treatment, and disposal within its jurisdiction. The Town
owns and operates a wastewater collection system and a wastewater treatment plant ("WWTP"). The Town has
entered into an agreement under which Old North State Water Company ("ONSWC") will provide treatment
services that will reduce the amount of treatment infrastructure the Town needs for the operation of its WWTP.
ONSWC will receive untreated wastewater from the Town's collection system, treat the water to water
reclamation standards (except for chlorination), and will introduce the water into a pipeline to the WWTP. The
pipeline is owned and operated by the Town as part of the Town's collection system. Untreated wastewater that
cannot be treated by ONSWC will be diverted by pipeline to a 2 MGD force main that will pump the untreated
wastewater to the City of Sanford's WWTP for treatment and disposal.
The Town's WWTP will receive water from ONSWC and will (1) divert some of the water to the Town's water
reclamation facility for chlorination and reuse and (2)finish treatment and sampling of the remainder of the water
before discharging it to Robeson Creek. Treatment for discharge will include disinfection by the Town's ultraviolet
light disinfection system as may be necessary and aeration of the water at the Town's cascade. Sampling locations
and methods will be unchanged. In the event that the Pittsboro WWTP Operator-in-Responsible-Charge for any
reason decides that wastewater from ONSWC will not be diverted to its reclaimed water system and will not be
discharged, the water will be directed to the Pittsboro-to-Sanford force main for treatment and disposal by the
Sanford WWTP.
The agreement is authorized by the North Carolina Constitution and North Carolina statutes. The constitution
provides: "The General Assembly may enact laws whereby the State, any county, city or town, and any other
public corporation may contract with and appropriate money to any person, association, or corporation for the
accomplishment of public purposes only." NC Const.art.V,§2(7). Accordingly, by statute,the Town has authority
to "contract with and appropriate money to any person, association, or corporation, in order to carry out any
public purpose that the city is authorized by law to engage in." N.C. Gen., Stat. § 160A-20.1(a). The Town is
authorized by law to provide wastewater collection,treatment, and disposal.See, e.g., 160A-311(3). In this case,
the Town is contracting for the accomplishment of some (but not all)of its wastewater treatment.
After ONSWC begins providing wastewater treatment services to the Town of Pittsboro, the Town will continue
to own and operate its wastewater collection system and WWTP. In the future,the Town may construct additional
wastewater treatment infrastructure and increase treatment that is accomplished by Town-owned WWTP
infrastructure. In any event, maintaining ownership and operation of the WWTP is important to the Town.
The Town will continue to be the correct entity to be the permittee under the NPDES permit that authorizes
discharges to Robeson Creek from the WWTP. According to EPA regulations that apply to State NPDES programs:
• "Any person who discharges or proposes to discharge pollutants... must submit a complete application...."
40 CFR § 122.21(a)(1).
• "Discharge" refers to discharges of pollutants to waters of the United States and expressly excludes the
introduction of wastewater or pollutants into a pipe that flows to a publicly owned treatment works
("POTW") such as ONSWC's introduction into the Pittsboro collection system of pollutants in its treated
wastewater effluent. 40 CFR 122.2 (definitions of discharge and discharge of a pollutant). It will be the
Town, not ONSWC, that discharges pollutants as contemplated by the Clean Water Act and the NPDES
permitting program.
4824-3953-1421.v3