NC0020354_Addendum_20200513

P.O.Box 1537
126A Commerce Court
Pittsboro,NC 27312 Hydrostructures, P.A.
Phone:[phone]
Fax:[phone]
T ,, RECEIVED
Transmittal Letter MAY 2 0 2020
NCDEQ/DWR/NPDES
To: Julie Grzyb From: Becky Smith
Re: NPDES Permit-Pittsboro Date: May 13,2020
CC:
0 Plans 0 Specifications 0 Shop Drawings 0 Copies Applications
,X_
Julie,
Please find enclosed one bound copy of the addendum to the initial renewal request for the Town of
Pittsboro's NPDES permit#NC0020354.
I have included a narrative to help clarify some of the answers for parts of Form 2A. I have also
included a narrative in Section 2.4 to better describe Pittsboro's process flow diagram.
Many Thanks are owed to several of your staff for their help in assisting me compile this application.
Please feel free to call with any questions.
Thanks,
Cif/7
Beck Smith, PE
HTDROSTRUCTURES®
Project Engineer
126 Commerce Court I Pittsboro, NC 27312
919/542.5002, ext.#233(office)
919/428.7169(cell)
www.hydrostructures.com

To: North Carolina Department of Environmental Quality R
Attention: Julie Grzyb, Supervisor, Complex Permitting MAy 2 0 2020
Jeff Poupart, Chief,Water Quality Permitting Section QID�RilvDES
19c0E
From: Mr. John Poteat,Town of Pittsboro Director of Public Works
Michael J. Myers, Envirolink, Inc. and Chatham Park Reclaimed Water Company, LLC
Timothy J. Baldwin, P.E., McKim &Creed, Inc.,consultant to Chatham Park Investors LLC
Re: Addendum to NPDES Permit Renewal Application
Request
We appreciate the opportunity to meet on January 14, 2020 to discuss the application of the Town of Pittsboro
("Town"or"Pittsboro")for renewal of its NDES Permit and the associated permitting of the Chatham Park Water Recovery
Center under the Town's NPDES Permit. Attached is the Town's revised NPDES Permit renewal application based on the
discussion and agreement at the conclusion of the meeting, with the Town and Chatham Park Reclaimed Water Company
("CP RWC") as co-applicants. CP RWC is the assignee of Old North State Water Company, LLC("ONSWC") under a "Master
Services Agreement" between the Town and ONSWC for ONSWC to construct a wastewater treatment facility (the "CP
WRC")for treatment of up to 0.499 MGD of wastewater per day to serve the Town's future residential and non-residential
customers in a service area described in the Master Services Agreement. Wastewater treated at the CP WRC can be
discharged by one or both of the following alternatives: returned to the CP WRC service area as reclaimed water; or
transmitted to the existing Town wastewater treatment facility ("Pittsboro WWTP")for further treatment and use by the
Town to serve an existing reclaimed water customer or for discharge into Robeson Creek pursuant to the Town's NPDES
Permit. The attached application has been updated onto the new 2A NPDES forms, and now identifies the Town and CP
RWC as co-applicants.
It is our recommendation that the NPDES permit be structured with the following considerations:
1. Flow—Compliance based on combined discharge from both facilities.
2. Concentration based limits—The Town and CP WRC each will monitor and be responsible for meeting the
concentration limits at its respective facility.
3. Mass Based limits—Compliance based on combined discharge from both facilities.
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 MGD discharge) and
the 1.971 MGD discharge to the Haw River, providing a total permitted wastewater management capacity of 3.22 MGD.
4824-3953-1421.e3

Planned/proposed operations. The planned operations are the following:
1. First,complete construction of the new CP WRC and the effluent force main to the Pittsboro WWTP. The
CP WRC will provide treatment services for wastewater received from the CP WRC service area (initially
up to 0.499 MGD of treated wastewater). Wastewater treated at the CP WRC can be discharged by one
or both of the following alternatives: (i) returned as reclaimed water to the Town's new reclaimed water
distribution system that will serve properties in the CP WRC service area;or(ii)conveyed to the Pittsboro
WWTP for further treatment and use by the Town to serve an existing reclaimed water customer or for
discharge into Robeson Creek (outfall 001) pursuant to the Town's NPDES Permit. Treated wastewater
from the CP WRC to be discharged into Robeson Creek will be combined with effluent from the Town's
WWTP just prior to discharge. The quality of the effluent exiting the CP WRC and the Pittsboro WWTP
will be monitored individually, and limited monitoring of the combined effluent may be required. The
configuration of this interconnection has been coordinated internally among staff and consultants, and
will be finalized during the NPDES application review and comment period.
2. Both facilities will continue to operate and discharge to Outfall 001 until completion of Phase 2 - the
Pittsboro to Sanford force main project.
3. Pittsboro's collection system will then divert up to 2 MGD of untreated wastewater to the Big Buffalo
WWTP in Sanford through the new force main to be constructed upon DWI loan approval, where it will
be treated and then discharged downstream of the Lake Jordan Watershed and the Haw River. The
Pittsboro WWTP will be updated to provide additional wet weather flow equalization for raw wastewater
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 EQ tanks,
� ) 4 p p g
automated diversion valves,new aeration diffusers for the converted tanks,and pipe and control changes.
4. Upon completion of the Pittsboro to Sanford force main, wastewater being collected at the Pittsboro site
will no longer be treated and will be pumped to Sanford. The Pittsboro pump station will continue to
receive treated wastewater from the CP RWC facility for discharge as described in paragraph 1.
The resulting near-term Pittsboro wastewater management capacity, with all planned operations in place, will be 2.499
MGD. See the attached flow charts (Attachment 1 &2)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 the Town's NPDES permit).
Sincerely,
ao
John Poteat,
Director of Public Works
Town of Pittsboro
cc: Paul Messick,Town of Pittsboro Attorney
Ken Eagle
Michael Myers
Tim Smith
Tim Baldwin

ATTACHMENT 1
PITTSBORO WASTEWATER MANAGEMENT SYSTEM AFTER PROPOSED PHASE 1 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
CP RWC Facility 3M plant in Pittsboro
Pittsboro sewer area
tributary to CP RWC Facility
IIIII.
s
Pittsboro WWTP Robeson Creek
Pittsboro sewer area
currently tributary to Pittsboro WWTP
4824-3953-1421.v3

ATTACHMENT 2
PITTSBORO WASTEWATER MANAGEMENT SYSTEM AFTER PROPOSED PHASE 2 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
CP RWC Facility Reclaimed water to 3M plant
Pittsboro sewer area
tributary to CP RWC Facility
°C01
Robeson Creek
Pittsboro pump station
Pittsboro sewer area with flow equalization
currently tributary to Pittsboro WWTP
Sanford WWTP Big Buffalo Creek

Narrative for Form 2A
Form 2A is structured to address permitting of one facility and one applicant. For Pittsboro,the new
situation will be two facilities with one shared discharge point and co-permittees. Some parts of Form
2A do not fit this scenario.This narrative is intended to provide clarification for certain sections of the
form that are not easily/clearly answered with the choices provided.
The Town of Pittsboro is contracting with the Chatham Park Reclaimed Water Company, LLC to provide
wastewater services for new development within the Town.The Town of Pittsboro, along with the
Chatham Park Reclaimed Water Company,are applying as co-permittees.The intent is for the discharge
of Outfall 001 to be distributed as 0.75 MGD for the existing Pittsboro WWTP and 0.499 MGD for the
new Chatham Park Water Recovery Center(CP WRC).The remainder of the permit, 1.97 MGD to Outfall
002, will remain solely with Pittsboro for future use.
In order to be clear about the design,treatment, and operation of each plant,the entire application has
been completed for each individual facility but signed by both applicants. Pittsboro has two outfalls, and
both have been included with the Pittsboro WWTP application,while only 0.499 mgd of outfall 001 has
been included with the CP WRC application.
Section 1.3: Both the Town of Pittsboro &Chatham Park Reclaimed Water Company, LLC are applying to
be co-permittees for the NPDES permit renewal for discharge to outfall 001. Both names and addresses
have been listed in this section.
It should be noted that The Town of Pittsboro("Pittsboro")entered into a "Master Services Agreement"
with Old North State Water Company, LLC("ONWSC")to acquire wastewater treatment services from a
new wastewater treatment facility being constructed by ONSWC. The Town is currently reviewing a
proposal where ONSWC will assign its interest in the Master Services Agreement to Chatham Park
Reclaimed Water Company, LLC("CP RWC"). CP RWC will own and operate the Water Recovery Center
(WRC), which also has been referred to in previous documents as Chatham Park Decentralized Water
Resource Recovery Facility(WRRF).
Section 1.4:The applicants will be both the Town of Pittsboro&Chatham Park Reclaimed Water
Company, LLC(CP RWC). CP RWC will own and operate the new facility;the Water Recovery Center.The
Town of Pittsboro will own and operate the existing Pittsboro WWTP.
Section 1.5:Correspondence should be sent to both applicants.
Section 1.10:The Annual Average Flow Rate for Pittsboro has been determined by using the plant
effluent meters.The discharge to Roberson Creek has been added to the pumped reclaimed water to
determine the total effluent leaving the plant each day. For 2019, this resulted in an average daily flow
of 0.498 mgd leaving the plant.See process flow diagram in section 2.4 for meter locations.
Section 1.16: For the CP WRC, effluent will be transported to another facility(Pittsboro WWTP) but not
for treatment prior to discharge into Roberson Creek. If the effluent is used for reclaimed water,then
chlorine will be added before it is pumped to the Pittsboro reclaimed water customer.
Section 2.3: A topo map has been provided for each facility along with maps showing the phases listed
in Section 2.5.

Section 2.4 For the CP WRC application,the complete report from McKim &Creed has been included;
"Chatham Park Decentralized Water Resource Recovery Facility(WRRF) Preliminary Basis of Design
Report" dated July 31, 2019. An updated process flow diagram has also been included.
For the Pittsboro application, an updated process flow diagram has been included that shows the
proposed discharge tie-in point of the CP WRC facility to outfall 001.This is Phase 1 listed in Section 2.5.
This design is not yet complete but shows the most recent plan revision. A second Pittsboro process flow
diagram has been included that shows the basic tie-in of the proposed pump station/force main to the
Sanford project—this is Phase 2 listed in Section 2.5.
Section 2.5:The first improvement listed for both applicants is the construction of the Water Recovery
Center and its discharge to Pittsboro WWTP Outfall 001.The new facility is currently under construction
with permit#WQC0039375.The force main that transports this treated effluent to the Pittsboro WWYP
is currently under construction with a zero-flow permit#40514.The final design for the tie-in of the
effluent force main to the Pittsboro plant is currently under review by Pittsboro Staff and has not yet
been approved. It is anticipated that the final design of the tie-in point will be submitted along with the
application for an authorization to construct (ATC)for the new CP WRC. Both plants will operate using
Outfall 001 until completion of the second improvement for the Pittsboro facility.
The second improvement listed for Pittsboro is the construction of a pump station and force main that
will convey up to 2.0 MGD of untreated wastewater to the Big Buffalo WWTP in Sanford. This project
will include repurposing and converting some of the Pittsboro WWTP infrastructure (e.g.,
equalization and treatment tanks)to provide additional wet weather flow equalization.
Once completed, untreated wastewater from the existing Pittsboro service area and parts of the future
CP WRC service area, will be pumped to the Sanford facility. At that time,effluent from CP WRC will
either be used to supply Pittsboro's reclaimed water customer, 3M, or discharged to Roberson Creek.
The Sanford project is currently under review by the Division of Water Infrastructure.
The raw sewage force main from the CP WRC to the Pittsboro plant is also currently under construction
with permit#40514.This force main is intended to be used when the pump station is complete but is
being installed parallel to the treated effluent force main.This will allow flexibility during start-up of the
new CP WRC. If there are difficulties during start-up, effluent can be diverted into the raw sewage force
main and treated at the Pittsboro WWTP. Afterwards,this line will not be used until the Pittsboro pump
station is operational and the raw sewage will be pumped to Sanford. (This raw sewage force main is
being installed in Phase 1 for start-up emergencies, but is intended to be operated during Phase 2.)
Section 3.8:The Pittsboro WWTP has been modified over the years and the "Design Removal Rates" are
unknown. In order to provide the removal rate needed for this Table,the 2019 DMRs were used to
compare the influent sampling of BOD and TSS to the effluent sampling. Using the monthly average,the
plant had a 99% removal rate for both BOD&TSS in 2019. It should be noted that this% removal rate is
lower when flow through the plant exceeds the Design Flow of 0.75 mgd. Influent sampling is only
conducted for BOD&TSS, therefore% removal rates for phosphorus and nitrogen could not be
calculated.

Table for information in Section 3.8-Pittsboro WWTP-based on DMRs 2019
Influent BOO fluent BOD % Influent TSS 'Effluent TSS %
'. Monthly Avg ' 'Monthly Avg reduction , Monthly Avg Monthly Avg reduction
(mg/L) (mg/L) BOD (mg/L) (mg/L) TSS
01/01/19 192.000 1.700 99.99 175.333 2.146 99.99
02/01/19 199.166 2.425 99.99 163.333 3.491 99.98
03/01/19 193.333 2.766 99.99 155.000 3.150 99.98
04/01/19 163.080 8.353 99.95 147.310 12.061 99.92
05/01/19 226.429 1.057 100.00 217.143 1.142 99.99
06/01/19 228.333 0.000 100.00 220.833 0.308 100.00
07/01/19 284.286 0.000 100.00 261.429 0.000 100.00
08/01/19 263.846 0.000 100.00 249.231 0.000 100.00
09/01/19 270.833 0.000 100.00 260.833 0.000 100.00
10/01/19 274.667 0.000 100.00 248.000 0.000 100.00
11/01/19 271.667 0.225 100.00 251.667 1.508 99.99
12/01/19 226.154 0.530 100.00 224.615 1.561 99.99
*0.000=below detectable limits
In order to clarify the discharge to Outfall 001 during the two phases of development listed in Section
2.5, the Table in Section 3.8 has been completed by Phase and by Facility.This has been noted in the
row entitled "Design Removal Rates by Outfall." During Phase 1, both plants will discharge to Outfall
001. During Phase 2, only the CP WRC will discharge to Outfall 001.
Section 3.9: UV information for the Pittsboro WWTP has been attached in the Appendix.
Section 3.16: Each facility has a design flow less than 1.0 mgd, but the total discharge to Outfall 001 will
be greater than 1.0 mgd. The Town completed a Priority Pollutant Scan in July 2019 and the test results
are attached to meet the requirements in Table C.The results of the first WET test were received May 1,
2020 and have been attached with Table E.
Section 3.26: After consultation with NCDEQ Aquatic Toxicology Branch (ATB), Pittsboro was instructed
to begin second species testing ASAP and repeat for the next 3 months so that the required 4 test
results would be included with the NPDES Permit renewal application. Pittsboro received the results of
the first WET test on May 1, 2020. The official results have been attached as Table E.The Town will
submit the remaining 3 test results as soon as they are available.

United States Office of Water EPA Form 3510-2A
Environmental Protection Agency Washington,D.C. Revised March 2019
Water Permits Division
..EPAApplication Form 2A
New and Existing Publicly
Owned Treatment Works
NPDES Permitting Program
Note: Complete this form if your facility is a new or existing publicly owned treatment works.

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0020354 Pittsboro WWTP OMB No.2040-0004
Form U.S.Environmental Protection Agency
2A : EPA Application for NPDES Permit to Discharge Wastewater
NPDES NEW AND EXISTING PUBLICLY OWNED TREATMENT WORKS
SECTION 1.BASIC APPLICATION INFORMATION FOR ALL APPLICANTS(40 CFR 122.21(j)(1)and(9))
1.1 Facility name
Pittsboro WWTP
Mailing address(street or P.O.box)
P.O.Box 759
City or town State ZIP code
o Pittsboro NC 27312
Contact name(first and last) Title Phone number Email address
John Poteat Public Works&Utilities Direct [phone] [e-mail]
Location address(street,route number,or other specific identifier) ❑ Same as mailing address
A 485 Small Street
w
City or town State ZIP code
Pittsboro NC 27312
1.2 Is this application for a facility that has yet to commence discharge?
❑ Yes 4 See instructions on data submission ❑ No
requirements for new dischargers.
1.3 Is applicant different from entity listed under Item 1.1 above?
❑✓ Yes ❑ No 4 SKIP to Item 1.4.
Applicant name
1)Town of Pittsboro AND 2)Chatham Park Reclaimed Water Company,LLC
Applicant address(street or P.O.box)
1)P.O.Box 759 2)4700 Homewood Ct.Suite 108
City or town State ZIP code
1)Pittsboro 2)Raleigh 1)NC 2)NC 1)27312 2)27609
Contact name(first and last) Title Phone number Email address
fl 1)John Poteat2)Michael Myers 1)Director 2)Manager [phone] [e-mail],mmyer
a
a 1.4 Is the applicant the facility's owner,operator,or both?(Check only one response.)
❑ Owner ❑ Operator El Both
1.5 To which entity should the NPDES permitting authority send correspondence?(Check only one response.)
❑ Facility ❑� Applicant ❑ Facility and applicant
(they are one and the same)
1.6 Indicate below any existing environmental permits.(Check all that apply and print or type the corresponding permit
number for each.)
Existing Environmental Permits
❑ NPDES(discharges to surface ❑ RCRA(hazardous waste) ❑ UIC(underground injection
water) control)
E NC0020354
o ❑ PSD(air emissions) ❑ Nonattainment program(CAA) ❑ NESHAPs(CM)
rn
N ❑ Ocean dumping(MPRSA) ❑ Dredge or fill(CWA Section ❑✓ Other(specify)
404)
Conjuntive Reclaim Water H
EPA Form 3510-2A(Revised 3-19) Page 1

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0020354 Pittsboro WWTP OMB No.2040-0004
1.7 Provide the collection system information requested below for the treatment works.
Municipality Population Collection System Type
Served Served (indicate percentage) Ownership Status
100 %separate sanitary sewer 0 Own 0 Maintain
%
Town of 4287 @ 2018 combined storm and sanitary sewer 0 Own 0 Maintain
ea) Pittsboro 0 Unknown 0 Own 0 Maintain
co %separate sanitary sewer 0 Own 0 Maintain
%combined storm and sanitary sewer 0 Own 0 Maintain
63
0 Unknown ❑ Own 0 Maintain
a %separate sanitary sewer 0 Own 0 Maintain
c %combined storm and sanitary sewer 0 Own 0 Maintain
E 0 Unknown 0 Own 0 Maintain
a, %separate sanitary sewer 0 Own 0 Maintain
co %combined storm and sanitary sewer 0 Own 0 Maintain
C 0 Unknown 0 Own 0 Maintain
0
Total
Population 4287
c3 Served
Separate Sanitary Sewer System Combined Storm and
Sanitary Sewer
Total percentage of each type of
sewer line(in miles) 100
z' 1.8 Is the treatment works located in Indian Country?
c
o ❑ Yes ❑✓ No
U
c 1.9 Does the facility discharge to a receiving water that flows through Indian Country?
c 0 Yes ❑✓ No
1.10 Provide design and actual flow rates in the designated spaces. Design Flow Rate
0.75 mgd
To
(1' Annual Average Flow Rates(Actual)
c
2 Two Years Ago Last Year This Year
mi
0 0.327 mgd 0.505 mgd 0.498 mgd
a" Maximum Daily Flow Rates(Actual)
o Two Years Ago Last Year This Year
1.67 mgd 1.75 mgd 1.44 mgd
cr, 1.11 Provide the total number of effluent discharge points to waters of the United States by type.
o Total Number of Effluent Discharge Points by Type
a. a Constructed
Er'1-- Treated Effluent Untreated Effluent Combined Sewer Bypasses Emergency
- - Overflows Overflows
0
y
0 1 0 0 0 0
I
EPA Form 3510-2A(Revised 3-19) Page 2

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0020354 Pittsboro WWTP OMB No.2040-0004
Outfalls Other Than to Waters of the United States
1.12 Does the POTW discharge wastewater to basins,ponds,or other surface impoundments that do not have outlets for
discharge to waters of the United States?
❑ Yes ❑✓ No 4 SKIP to Item 1.14.
1.13 Provide the location of each surface impoundment and associated discharge information in the table below.
Surface Impoundment Location and Discharge Data
Average Daily Volume Continuous or Intermittent
Location Discharged to Surface (check one)
Impoundment
0 Continuous
gpd 0 Intermittent
❑ Continuous
gpd 0 Intermittent
0 Continuous
gpd 0 Intermittent
2 1.14 Is wastewater applied to land?
❑ Yes ❑✓ No 4 SKIP to Item 1.16.
c 1.15 Provide the land application site and discharge data requested below.
Land Application Site and Discharge Data
o Continuous or
Location Size Average Daily Volume Intermittent
Applied (check one)
= acres d 0 Continuous
o gp 0 Intermittent
acres d 0 Continuous
o gp 0 Intermittent
cs acres d 0 Continuous
gp ❑ Intermittent
R 1.16 Is effluent transported to another facility for treatment prior to discharge?
❑ Yes m No 4 SKIP to Item 1.21.
1.17 Describe the means by which the effluent is transported(e.g.,tank truck,pipe).
1.18 Is the effluent transported by a party other than the applicant?
❑ Yes ❑ No 4 SKIP to Item 1.20.
1.19 Provide information on the transporter below.
Transporter Data
Entity name Mailing address(street or P.O. box)
City or town State ZIP code
Contact name(first and last) Title
Phone number Email address
EPA Form 3510-2A(Revised 3-19) Page 3

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0020354 Pittsboro WWTP OMB No.2040-0004
1.20 In the table below,indicate the name,address,contact information,NPDES number,and average daily flow rate of the
receiving facility.
Receiving Facility Data
Facility name Mailing address(street or P.O. box)
City or town State ZIP code
0
Contact name(first and last) Title
0
Phone number Email address
aNPDES number of receiving facility(if any) 0 None Average daily flow rate mgd
1.21 Is the wastewater disposed of in a manner other than those already mentioned in Items 1.14 through 1.21 that do not
° have outlets to waters of the United States(e.g.,underground percolation,underground injection)?
❑ Yes ❑✓ No 4 SKIP to Item 1.23.
0 1.22 Provide information in the table below on these other disposal methods.
Zr) Information on Other Disposal Methods
o Disposal Location of Size of Annual Average Continuous or Intermittent
Method Disposal Site Disposal Site Daily Discharge (check one)
Description Volume
acres gpd ❑ Continuous
❑ Intermittent
0
acresgpd 0 Continuous
0 Intermittent
❑ Continuous
acres 91)d ❑ Intermittent
1.23 Do you intend to request or renew one or more of the variances authorized at 40 CFR 122.21(n)?(Check all that apply.
Consult with your NPDES permitting authority to determine what information needs to be submitted and when.)
c ❑ Discharges into marine waters(CWA ❑ Water quality related effluent limitation(CWA Section
Section 301(h)) 302(b)(2))
❑✓ Not applicable
1.24 Are any operational or maintenance aspects(related to wastewater treatment and effluent quality)of the treatment works
the responsibility of a contractor?
❑ Yes ❑� No+SKIP to Section 2.
1.25 Provide location and contact information for each contractor in addition to a description of the contractor's operational
and maintenance responsibilities.
Contractor Information
Contractor 1 Contractor 2 Contractor 3
= Contractor name
0
(company name)
Mailing address
(street or P.O.box)
City,state,and ZIP
code
Contact name(first and
ci last)
Phone number
Email address
Operational and
maintenance
responsibilities of
contractor
EPA Form 3510-2A(Revised 3-19) Page 4

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0020354 Pittsboro WWTP OMB No.2040-0004
SECTION 2.ADDITIONAL INFORMATION(40 CFR 122.21(j)(1)and(2))
Outfalls to Waters of the United States
2.1 Does the treatment works have a design flow greater than or equal to 0.1 mgd?
m
o ❑✓ Yes ❑ No 4 SKIP to Section 3.
c 2.2 Provide the treatment works'current average daily volume of inflow Average Daily Volume of Inflow and Infiltration
and infiltration.
136,500 gpd
Indicate the steps the facility is taking to minimize inflow and infiltration.
a
The Town began an I/I reduction program in 2002 and the last project in 2016 brought total repairs to 25,485 LF pipe
(15%)&186 manholes(25%)rehabilitated of the total 167,467 LF&759 manholes in the system. In 2010 the Town
completed two 315,000+gallon Equalization Basins that allows the plant to endure wet weather events.
2.3 Have you attached a topographic map to this application that contains all the required information?(See instructions for
CV a specific requirements.)
CL
o �
❑✓ Yes ❑ No
E 2.4 Have you attached a process flow diagram or schematic to this application that contains all the required information?
o a,
(See instructions for specific requirements.)
o ❑✓ Yes ❑ No
2.5 Are improvements to the facility scheduled?
❑✓ Yes 0 No 4 SKIP to Section 3.
Briefly list and describe the scheduled improvements.
;a 1.Construct Water Recovery Center;to discharge through Pittsboro WWTP Outfall 001
c
a)
E
a 2.Construct Pittsboro pump station and force main to Sanford WWTP for up to 2.0 mgd untreated effluent.
0
3.
d
a
4.
tu 2.6 Provide scheduled or actual dates of completion for improvements.
Scheduled or Actual Dates of Completion for Improvements
Scheduled
Affected Attainment of
Begin End Begin
2 Outfalls Operational
Improvement Construction Construction Discharge
(from above) (list outfall (MM/DD/YYYY) (MM/DD/YYYY) (MM/DD/YYYY) Level
number) (MM/DD/YYYY)
1. 001 04/01/2018 03/01/2021 04/01/2021 04/01/2021
cu
2. 001 01/01/2021 01/01/2023 05/01/2023 06/01/2023
co
3.
4.
2.7 Have appropriate permits/clearances concerning other federal/state requirements been obtained?Briefly explain your
response.
❑✓ Yes 0 No 0 None required or applicable
Explanation:
Construction permits for phase 1 obtained.Need NPDES&authorization to operate.Phase 2 under review.
EPA Form 3510-2A(Revised 3-19) Page 5

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0020354 Pittsboro WWTP OMB No.2040-0004
SECTION 3.INFORMATION ON EFFLUENT DISCHARGES(40 CFR 122.21(j)(3)to(5))
3.1 Provide the following information for each outfall.(Attach additional sheets if you have more than three outfalls.)
Outfall Number 001 Outfall Number 002 Outfall Number
State North Carolina North Carolina
County Chatham Chatham
0 City or town Pittsboro Pittsboro
0
s Distance from shore n/a ft. n/a ft. ft.
Q
Depth below surface n/a ft. n/a ft. ft.
0
Average daily flow rate 0.49 mgd 0 mgd mgd
Latitude 35° 42' 47.9" N 35° 43' 49.5" N
Longitude 79° 10' 13.5" W 79° 06' 24.9" W
3.2 Do any of the outfalls described under Item 3.1 have seasonal or periodic discharges?
0 ❑ Yes ✓❑ No—) SKIP to Item 3.4.
r
3.3 If so,provide the following information for each applicable outfall.
N Outfall Number Outfall Number Outfall Number
0
Number of times per year
0 discharge occurs
n Average duration of each
discharge(specify units)
o Average flow of each mgd an mgd d
discharge g g
n Months in which discharge
occurs
3.4 Are any of the outfalls listed under Item 3.1 equipped with a diffuser?
❑ Yes ❑✓ No 4 SKIP to Item 3.6.
CL, 3.5 Briefly describe the diffuser type at each applicable outfall.
a
Outfall Number Outfall Number Outfall Number
U)
N
o crs Does the treatment works discharge or plan to discharge wastewater to waters of the United States from one or more
3.6 discharge points?
11 Yes ❑ No+SKIP to Section 6.
EPA Form 3510-2A(Revised 3-19) Page 6

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0020354 Pittsboro WWTP OMB No.2040-0004
3.7 Provide the receiving water and related information(if known)for each outfall.
Outfall Number 001 Outfall Number 002 Outfall Number
Receiving water name Robeson Creek Haw River
Name of watershed,river,
c or stream system Roberson Creek-Haw River Roberson Creek-Haw River
c U.S.Soil Conservation
0 Service 14-digit watershed 030300020703 030300020704
ca code
0 Name of state Cape Fear Cape Fear
management/river basin
rn
U.S.Geological Survey
E 8-digit hydrologic 03030002 03030002
ix cataloging unit code
Critical low flow(acute) cfs cfs cfs
Critical low flow(chronic) cfs cfs cfs
Total hardness at critical mg/L/L of /L of mg/L of
9 9
low flow CaCO3 CaCO3 CaCO3
3.8 Provide the following information describing the treatment provided for discharges from each outfall.
Outfall Number 001 Outfall Number 001 Outfall Number ow
Highest Level of 0 Primary ❑ Primary 0 Primary
Treatment(check all that 0 Equivalent to 0 Equivalent to 0 Equivalent to
apply per outfall) secondary secondary secondary
10 Secondary 0 Secondary ❑ Secondary
❑ Advanced 0 Advanced 0 Advanced
❑ Other(specify) 0 Other(specify) 0 Other(specify)
c
0
Q Design Removal Rates by Pittsboro-Phase 1 CP WRC-Phase 1 CP WRC-Phase 2
0 Outfall
0
w
ca
BOD5 or CBOD5 99 % 98 % 98
ok
E
es
TSS 99 % 98 % 98 %
it
❑Not applicable 0 Not applicable 0 Not applicable
Phosphorus unknown % 98 % 98 %
0 Not applicable 0 Not applicable 0 Not applicable
Nitrogen unknown % 92 % 92
Other(specify) 0 Not applicable 0 Not applicable 0 Not applicable
EPA Form 3510-2A(Revised 3-19) Page 7

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0020354 Pittsboro WWTP OMB No.2040-0004
3.9 Describe the type of disinfection used for the effluent from each outfall in the table below.If disinfection varies by
season,describe below.
-o
c
0
0
Outfall Number 001 Outfall Number 002 Outfall Number
0
9- Disinfection type
U V n/a
w
a>
Seasons used All n/a
to
E
Dechlorination used? ❑✓ Not applicable ❑✓ Not applicable ❑ Not applicable
❑ Yes ❑ Yes ❑ Yes
❑ No ❑ No ❑ No
3.10 Have you completed monitoring for all Table A parameters and attached the results to the application package?
✓❑ Yes ❑ No
3.11 Have you conducted any WET tests during the 4.5 years prior to the date of the application on any of the facility's
discharges or on any receiving water near the discharge points?
❑✓ Yes ❑ No 4 SKIP to Item 3.13.
3.12 Indicate the number of acute and chronic WET tests conducted since the last permit reissuance of the facility's
discharges by outfall number or of the receiving water near the discharge points.
Outfall Number 001 Outfall Number Outfall Number
Acute Chronic Acute Chronic Acute Chronic
Number of tests of discharge 1
water _
Number of tests of receiving 0
water
3.13 Does the treatment works have a design flow greater than or equal to 0.1 mgd?
„ ❑✓ Yes ❑ No 4 SKIP to Item 3.16.
3.14 Does the POTW use chlorine for disinfection,use chlorine elsewhere in the treatment process,or otherwise have
reasonable potential to discharge chlorine in its effluent?
❑ Yes 4 Complete Table B,including chlorine. ❑ No 4 Complete Table B,omitting chlorine.
;` 3.15 Have you completed monitoring for all applicable Table B pollutants and attached the results to this application
package?
❑✓ Yes ❑ No
3.16 Does one or more of the following conditions apply?
• The facility has a design flow greater than or equal to 1 mgd.
• The POTW has an approved pretreatment program or is required to develop such a program.
• The NPDES permitting authority has informed the POTW that it must sample for the parameters in Table C,must
sample other additional parameters(Table D),or submit the results of WET tests for acute or chronic toxicity for
each of its discharge outfalls(Table E).
❑ Yes 4 Complete Tables C,D,and E as ❑ No 4 SKIP to Section 4.
applicable.
3.17 Have you completed monitoring for all applicable Table C pollutants and attached the results to this application
package?
❑✓ Yes ❑ No
3.18 Have you completed monitoring for all applicable Table D pollutants required by your NPDES permitting authority and
attached the results to this application package?
El Yes No additional sampling required by NPDES
permitting authority.
EPA Form 3510-2A(Revised 3-19) Page 8

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0020354 Pittsboro WWTP OMB No.2040-0004
3.19 Has the POTW conducted either(1)minimum of four quarterly WET tests for one year preceding this permit application
or(2)at least four annual WET tests in the past 4.5 years?
El Yes ❑✓ No 4 Complete tests and Table E and SKIP to
Item 3.26.
3.20 Have you previously submitted the results of the above tests to your NPDES permitting authority?
El Yes ❑ No 4 Provide results in Table E and SKIP to
Item 3.26.
3.21 Indicate the dates the data were submitted to your NPDES permitting authority and provide a summary of the results.
Date(s)Submitted Summary of Results
(MM/DD/YYYY)
a
CD
C
0
co co3.22 Regardless of how you provided your WET testing data to the NPDES permitting authority,did any of the tests result in
toxicity?
01
❑ Yes ❑ No 4 SKIP to Item 3.26.
0 3.23 Describe the cause(s)of the toxicity:
C
C,
w
3.24 Has the treatment works conducted a toxicity reduction evaluation?
❑ Yes ❑ No 4 SKIP to Item 3.26.
3.25 Provide details of any toxicity reduction evaluations conducted.
3.26 Have you completed Table E for all applicable outfalls and attached the results to the application package?
Yes ❑ Not applicable because previously submitted
information to the NPDES •ermittin• authorit .
SECTION 4.INDUSTRIAL DISCHARGES AND HAZARDOUS WASTES(40 CFR 122.21(j)(6)and(7))
4.1 Does the POTW receive discharges from SlUs or NSCIUs?
❑ Yes ❑✓ No 4 SKIP to Item 4.7.
4.2 Indicate the number of SlUs and NSCIUs that discharge to the POTW.
Number of Sills Number of NSCIUs
0
R 4.3 Does the POTW have an approved pretreatment program?
❑ Yes ❑ No
-0
4.4 Have you submitted either of the following to the NPDES permitting authority that contains information substantially
identical to that required in Table F:(1)a pretreatment program annual report submitted within one year of the
application or(2)a pretreatment program?
L
N ❑ Yes ❑,r No 4 SKIP to Item 4.6.
7L 4.5 Identify the title and date of the annual report or pretreatment program referenced in Item 4.4.SKIP to Item 4.7.
U)
— 4.6 Have you completed and attached Table F to this application package?
O Yes ❑ No
EPA Form 3510-2A(Revised 3-19) Page 9

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0020354 Pittsboro WWTP OMB No.2040-0004
4.7 Does the POTW receive,or has it been notified that it will receive,by truck,rail,or dedicated pipe,any wastes that are
regulated as RCRA hazardous wastes pursuant to 40 CFR 261?
O Yes ❑✓ No 4 SKIP to Item 4.9.
4.8 If yes,provide the following information:
Annual
Hazardous Waste Waste Transport Method Amount of Units
Number (check all that apply) Waste
Received
❑ Truck ❑ Rail
❑ Dedicated pipe ❑ Other(specify)
c
0
t)
d ❑ Truck 0 Rail
❑ Dedicated pipe ❑ Other(specify)
O
12
N ❑ Truck 0 Rail
_ ❑ Dedicated pipe ❑ Other(specify)
13)
4.9 Does the POTW receive,or has it been notified that it will receive,wastewaters that originate from remedial activities,
y including those undertaken pursuant to CERCLA and Sections 3004(7)or 3008(h)of RCRA?
❑ Yes ❑✓ No 4 SKIP to Section 5.
7,1
rn 4.10 Does the POTW receive(or expect to receive)less than 15 kilograms per month of non-acute hazardous wastes as
specified in 40 CFR 261.30(d)and 261.33(e)?
❑ Yes 4 SKIP to Section 5. 0 No
4.11 Have you reported the following information in an attachment to this application:identification and description of the
site(s)or facility(ies)at which the wastewater originates;the identities of the wastewater's hazardous constituents;and
the extent of treatment,if any,the wastewater receives or will receive before entering the POTW?
❑ Yes 0 No
SECTION 5.COMBINED SEWER OVERFLOWS(40 CFR 122.21(j)(8))
5.1 Does the treatment works have a combined sewer system?
o) ❑ Yes ❑ No+SKIP to Section 6.
R
5.2 Have you attached a CSO system map to this application?(See instructions for map requirements.)
a ❑ Yes El No
f0
5.3 Have you attached a CSO system diagram to this application?(See instructions for diagram requirements.)
c.) ❑ Yes 0 No
EPA Form 3510-2A(Revised 3-19) Page 10

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0020354 Pittsboro WWTP OMB No.2040-0004
5.4 For each CSO outfall, provide the following information.(Attach additional sheets as necessary.)
CSO Outfall Number CSO Outfall Number CSO Outfall Number
Cityor town
c
0
w
State and ZIP code
0
1 o County
0
0
Latitude " II °
N Longitude "' "
U
Distance from shore ft. ft. ft.
Depth below surface ft. ft. ft.
5.5 Did the POTW monitor any of the following items in the past year for its CSO outfalls?
CSO Outfall Number CSO Outfall Number CSO Outfall Number
Rainfall ❑ Yes El No ❑ Yes ❑ No El Yes El No
a,
c
.`o CSO flow volume El Yes El No El Yes El No 0 Yes El No
o CSO pollutant El Yes El No El Yes ❑ No El Yes ❑ No
o concentrations
N
Receiving water quality ❑ Yes ❑ No El Yes El No El Yes El No
CSO frequency ❑ Yes El No El Yes El No ❑ Yes 0 No
Number of storm events El Yes El No El Yes ❑ No ❑ Yes ❑ No
5.6 Provide the following information for each of your CSO outfalls.
CSO Outfall Number CSO Outfall Number CSO Outfall Number
>- Number of CSO events in events events events
the past year
R
Average duration per hours hours hours
N event
0 Actual or 0 Estimated 0 Actual or 0 Estimated 0 Actual or 0 Estimated
v
rL million gallons million gallons million gallons
o Average volume per event
o 0 Actual or 0 Estimated 0 Actual or 0 Estimated 0 Actual or 0 Estimated
Minimum rainfall causing inches of rainfall inches of rainfall inches of rainfall
a CSO event in last year 0 Actual or❑Estimated 0 Actual or 0 Estimated El Actual or 0 Estimated
EPA Form 3510-2A(Revised 3-19) Page 11

EPA AmebaKA Number NPDES Permit Number Fea►ty Nome Form Approved 03/05/19
NC0020354 Pittsboro WWTP OMB No 1040-0001
5.7 Provide the information in the table below for each of your CSO outfalls.
CSO Outfell Number CSO Outfa11 Number,_.. CSO Outfall Number
Receiving water name
Name of watersheds
stream system
U.S Soil Conservation 0 Unknown ❑Unknown 0 Unknown
Service 14-digit
watershed code
(if known)
Name of state
management/river basin
U.S Geological Survey 0 Unknown 0 Unknown ❑Unknown
8-Digit Hydrologic Unit
Code(if known)
Description of known
water quality impacts on
receiving stream by CSO
(see instructions for
exam.les
SECTION 6.CHECKLIST AND CERTIFICATION STATEMENT(40 CFR 122.22(a)and(d))
6.1 In Column 1 below,mark the sections of Form 2A that you have completed and are submitting with your application.For
each section,specify in Column 2 any attachments that you are enclosing to alert the permitting authority.Note that not
all applicants are required to provide attachments.
Column 1 Column 2
1.71 Section 1:Basic Application
Information for All Applicants ❑ w/variance request(s) w/additional attachments
0 Section 2:Additional El wl topographic map ❑ wl process flow diagram
Information 0 wl additional attachments
❑� wl Table A ❑ wl Table D
❑ Section 3:Information on ❑ w/Table B ❑ wl Table E
Effluent Discharges
❑✓ wi Table C 0 wl additional attachments
Section 4:Industrial 0 wl SIU and NSCIU attachments ❑ wl Table F
N ❑ Discharges and Hazardous
Wastes ❑ w/additional attachments
❑ Section 5:Combined Sewer ❑ w/CSO map ❑ wl additional attachments
Overflows ❑ wl CSO system diagram
❑ Section 6:Checklist and 0 wl attachments
1n
Certification Statement
B,2 Certification Statement
1 certify under penalty of law that this document and all attachments were prepared under my direction or supervision in
accordance with a system designed to assure that qualified personnel properly gather and evaluate the information
submitted.Based on my inquiry of the person or persons who manage the system,or those persons directly responsible
for gathering the information,the information submitted is,to the best of my knowledge and belief,true,accurate,and
complete.lam aware that there are significant penalties for submitting false information,including the possibility of fine
and imprisonment for knowing violations.
Name(print or type first and last name) Official tine
1)John Poteat&2)Michael Myers 1)Utilities Director&2)Manager
Sign Date signed
;)._
3-19
EPA Form 3510-2A(Rexsed ) Pap 12

United States Office of Water EPA Form 3510-2A
Environmental Protection Agency Washington,D.C. Revised March 2019
Water Permits Division
.e.EPA Application Form 2A
New and Existing Publicly
Owned Treatment Works
NPDES Permitting Program
Note: Complete this form if your facility is a new or existing publicly owned treatment works.

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
New Facility NC0020354 Water Recovery Center OMB No.2040-0004
Form U.S.Environmental Protection Agency
2A &EPA Application for NPDES Permit to Discharge Wastewater
NPDES NEW AND EXISTING PUBLICLY OWNED TREATMENT WORKS
SECTION 1.BASIC APPLICATION INFORMATION FOR ALL APPLICANTS(40 CFR 122.21(j)(1)and(9))
1.1 Facility name
Water Recovery Center
Mailing address(street or P.O.box)
4700 Homewood Court,Suite 108
City or town State ZIP code
o Raleigh NC 27609
Contact name(first and last) Title Phone number Email address
wc Michael Myers Manager [phone] [e-mail]
Location address(street,route number,or other specific identifier) ❑ Same as mailing address
2261 US Hwy.64 Business East
City or town State ZIP code
Pittsboro NC 27312
1.2 Is this application for a facility that has yet to commence discharge?
❑✓ Yes 4 See instructions on data submission ❑ No
requirements for new dischargers.
1.3 Is applicant different from entity listed under Item 1.1 above?
❑✓ Yes ❑ No 4 SKIP to Item 1.4.
Applicant name
1)Town of Pittsboro AND 2)Chatham Park Reclaimed Water Company,LLC
Applicant address(street or P.O.box)
0 1)P.O.Box 759 2)4700 Homewood Ct.Suite 108
o City or town State ZIP code
1)Pittsboro 2)Raleigh 1)NC 2)NC 1)27312 2)27609
co Contact name(first and last) Title Phone number Email address
n 1)John Poteat2)Michael Myers 1)Director 2)WRC Manager [phone] [e-mail],mmye
1.4 Is the applicant the facility's owner,operator,or both?(Check only one response.)
❑ Owner ❑ Operator ❑✓ Both
1.5 To which entity should the NPDES permitting authority send correspondence?(Check only one response.)
❑ Facility ✓❑ Applicant ❑ Facility and applicant
(they are one and the same)
1.6 Indicate below any existing environmental permits.(Check all that apply and print or type the corresponding permit
number for each.)
Existing Environmental Permits
✓❑ NPDES(discharges to surface ❑ RCRA(hazardous waste) ❑ UIC(underground injection
water) control)
NC0020354
2 ❑ PSD(air emissions) ❑ Nonattainment program(CAA) ❑ NESHAPs(CAA)
rn
❑ Ocean dumping(MPRSA) ❑ Dredge or fill(CWA Section ❑ Other(specify)
w 404)
WQC0039375
EPA Form 3510-2A(Revised 3-19) Page 1

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
New Facility NC0020354 Water Recovery Center OMB No.2040-0004
1.7 Provide the collection system information requested below for the treatment works.
Municipality Population Collection System Type
Served Served (indicate percentage) Ownership Status
100 %separate sanitary sewer 10 Own t] Maintain
-a Future Town of 0 %
d combined storm and sanitary sewer 0 Own 0 Maintain
Pittsboro 0 Unknown 0 Own 0 Maintain
co %separate sanitary sewer 0 Own 0 Maintain
•7 %combined storm and sanitary sewer 0 Own 0 Maintain
0 Unknown ❑ Own 0 Maintain
a %separate sanitary sewer ❑ Own ❑ Maintain
a %combined storm and sanitary sewer ❑ Own ❑ Maintain
mi 0 Unknown ❑ Own 0 Maintain
E %separate sanitary sewer ❑ Own 0 Maintain
>, %combined storm and sanitary sewer 0 Own 0 Maintain
c 0 Unknown 0 Own 0 Maintain
.1.7;
U Total
Population 0
o Served
Separate Sanitary Sewer System Combined Storm and
Sanitary Sewer
Total percentage of each type of
/
sewer line(in miles) 100 % °°
1.8 Is the treatment works located in Indian Country?
o ❑ Yes ❑✓ No
U
c 1.9 Does the facility discharge to a receiving water that flows through Indian Country?
c ❑ Yes ❑✓ No
1.10 Provide design and actual flow rates in the designated spaces. Design Flow Rate
0.499 mgd
3 U, Annual Average Flow Rates(Actual)
aUa II Two Years Ago Last Year This Year
0 o mgd mgd mgd
Fii Maximum Daily Flow Rates(Actual)
o Two Years Ago Last Year This Year
mgd mgd mgd
v, 1.11 Provide the total number of effluent discharge points to waters of the United States by type.
.o Total Number of Effluent Discharge Points by Type
41)
a- a Constructed
Combined Sewer
R a Treated Effluent Untreated Effluent Overflows Bypasses Emergency
_0 -0Overflows
0
N i
6 I 1 0 0 0 0
EPA Form 3510-2A(Revised 3-19) Page 2

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
New Facility NC0020354 Water Recovery Center OMB No.2040-0004
Outfalls Other Than to Waters of the United States
1.12 Does the POTW discharge wastewater to basins,ponds,or other surface impoundments that do not have outlets for
discharge to waters of the United States?
❑ Yes ❑ No 4 SKIP to Item 1.14.
1.13 Provide the location of each surface impoundment and associated discharge information in the table below.
Surface Impoundment Location and Discharge Data
Average Daily Volume Continuous or Intermittent
Location Discharged to Surface
Impoundment (check one)
❑ Continuous
gpd ❑ Intermittent
❑ Continuous
gpd 0 Intermittent
O Continuous
gpd 0 Intermittent
2 1.14 Is wastewater applied to land?
❑ Yes ❑✓ No 4 SKIP to Item 1.16.
0 1.15 Provide the land application site and discharge data requested below.
Land Application Site and Discharge Data
o Continuous or
Location Size Average Daily Volume Intermittent
a' Applied (check one)
acres d El Continuous
o gp 0 Intermittent
to gpd 0 Continuous
❑ Intermittent
gpd 0 Continuous
acres
to ❑ Intermittent
R 1.16 Is effluent transported to another facility for treatment prior to discharge?
o ❑✓ Yes ❑ No 4 SKIP to Item 1.21.
1.17 Describe the means by which the effluent is transported(e.g.,tank truck,pipe).
Pipe.Currently under construction-Permit#WQ0040741.
1.18 Is the effluent transported by a party other than the applicant?
❑ Yes ❑� No 4 SKIP to Item 1.20.
1.19 Provide information on the transporter below.
Transporter Data
Entity name Mailing address(street or P.O.box)
City or town State ZIP code
Contact name(first and last) Title
Phone number Email address
EPA Form 3510-2A(Revised 3-19) Page 3

EPA Idenfificafion Number NPDES Permit Number Facility Name Form Approved 03/05/19
New Facility NC0020354 Water Recovery Center OMB No.2040-0004
1.20 In the table below,indicate the name,address,contact information,NPDES number,and average daily flow rate of the
receiving facility.
Receiving Facility Data
-p Facility name Mailing address(street or P.O.box)
Pittsboro WWTP P.O.Box 759
4-2 City or town State ZIP code
o Pittsboro NC 27312
Contact name(first and last) Title
o John Poteat Public Works&Utilities Director
Phone number Email address
[phone] [e-mail]
o NPDES number of receiving facility(if any) 0 None Average daily flow rate 0.49 mgd
o.
0 1.21 Is the wastewater disposed of in a manner other than those already mentioned in Items 1.14 through 1.21 that do not
have outlets to waters of the United States(e.g.,underground percolation,underground injection)?
L ❑ Yes ❑✓ No 4 SKIP to Item 1.23.
0 1.22 Provide information in the table below on these other disposal methods.
Information on Other Disposal Methods
oDisposal Location of Size of Annual Average Continuous or Intermittent
Method Disposal Site Disposal Site Daily Discharge (check one)
Description Volume
acres gpd 0 Continuous
❑ Intermittent
0 Continuous
acres gpd ❑ Intermittent
acresgpd ❑ Continuous
0 Intermittent
1.23 Do you intend to request or renew one or more of the variances authorized at 40 CFR 122.21(n)?(Check all that apply.
a, r Consult with your NPDES permitting authority to determine what information needs to be submitted and when.)
C ❑ Discharges into marine waters(CWA ❑ Water quality related effluent limitation(CWA Section
Section 301(h)) 302(b)(2))
❑✓ Not applicable
1.24 Are any operational or maintenance aspects(related to wastewater treatment and effluent quality)of the treatment works
the responsibility of a contractor?
❑ Yes ❑✓ No+SKIP to Section 2.
1.25 Provide location and contact information for each contractor in addition to a description of the contractor's operational
and maintenance responsibilities.
Contractor Information
Contractor 1 Contractor 2 Contractor 3
c Contractor name
(company name)
Mailing address
(street or P.O.box)
City,state,and ZIP
code
Contact name(first and
c.) last)
Phone number
Email address
Operational and
maintenance
responsibilities of
contractor
EPA Form 3510-2A(Revised 3-19) Page 4

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
New Facility NC0020354 Water Recovery Center OMB No.2040-0004
SECTION 2.ADDITIONAL INFORMATION(40 CFR 122.21(j)(1)and(2))
o Outfalls to Waters of the United States
2.1 Does the treatment works have a design flow greater than or equal to 0.1 mgd?
rn
❑✓ Yes ❑ No 4 SKIP to Section 3.
c 2.2 Provide the treatment works'current average daily volume of inflow Average Daily Volume of Inflow and Infiltration
;� and infiltration.
0 gpd
Indicate the steps the facility is taking to minimize inflow and infiltration.
0
0
LE 2.3 Have you attached a topographic map to this application that contains all the required information?(See instructions for
o specific requirements.)
o E
F ❑✓ Yes ❑ No
E 2.4 Have you attached a process flow diagram or schematic to this application that contains all the required information?
o (See instructions for specific requirements.)
a,
o ❑✓ Yes 0 No
2.5 Are improvements to the facility scheduled?
❑✓ Yes ❑ No 4 SKIP to Section 3.
Briefly list and describe the scheduled improvements.
0
1.Construct Water Recovery Center;to discharge through Pittsboro WWTP Outfall 001
c
E
2.
E
0
3.
a
0
4.
m 2.6 Provide scheduled or actual dates of completion for improvements.
Scheduled or Actual Dates of Completion for Improvements
Scheduled
Affected
Begin End Begin Attainment of
Outfalls Operational
2 Improvement Construction Construction Discharge
(from above) (list outfall (MM/DD/YYYY) (MM/DD/YYYY) (MM/DD/YYYY) Level
number) (MM/DD/YYYY)
1. 001 04/01/2018 03/01/2021 04/01/2021 04/01/2021
N 2.
3.
4.
2.7 Have appropriate permits/clearances concerning other federal/state requirements been obtained?Briefly explain your
response.
❑✓ Yes ❑ No ❑ None required or applicable
Explanation:
Construction permit#WQC0039375.All permits with the exception of inclusion in the NPDES&Authorization to
(lnPrate
EPA Form 3510-2A(Revised 3-19) Page 5

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
New Facility NC0020354 Water Recovery Center OMB No.2040-0004
SECTION 3.INFORMATION ON EFFLUENT DISCHARGES(40 CFR 122.21(j)(3)to(5))
3.1 Provide the following information for each outfall.(Attach additional sheets if you have more than three outfalls.)
Outfall Number o01 Outfall Number Outfall Number
State North Carolina
R County Chatham
0 City or town Pittsboro
0
0 Distance from shore n/a ft. ft. ft.
a
Depth below surface n/a ft. ft. ft.
6
Average daily flow rate 0.499 mgd mgd mgd
Latitude 35° 42' 47.9" N ° °
Longitude 79° 10' 13.5" W
3.2 Do any of the outfalls described under Item 3.1 have seasonal or periodic discharges?
o ❑ Yes ❑✓ No 4 SKIP to Item 3.4.
3.3 If so,provide the following information for each applicable outfall.
L
Outfall Number Outfall Number Outfall Number
o _
Number of times per year
o discharge occurs
a Average duration of each
discharge(specify units)
o Average flow of each mgd mgd mgd
discharge
Months in which discharge
occurs
3.4 Are any of the outfalls listed under Item 3.1 equipped with a diffuser?
❑ Yes ❑✓ No 4 SKIP to Item 3.6.
3.5 Briefly describe the diffuser type at each applicable outfall.
a
Outfall Number Outfall Number Outfall Number
N
z
6
"5 vi 3.6 Does the treatment works discharge or plan to discharge wastewater to waters of the United States from one or more
discharge points?
w ❑✓ Yes ❑ No+SKIP to Section 6.
EPA Form 3510-2A(Revised 3-19) Page 6

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
New Facility NC0020354 Water Recovery Center OMB No.2040-0004
3.7 Provide the receiving water and related information(if known)for each outfall.
Outfall Number ow Outfall Number Outfall Number
Receiving water name Robeson Creek
Name of watershed,river,
`o or stream system Roberson Creek-Haw River
;i U.S.Soil Conservation
d Service 14-digit watershed 030300020703
o code
43 Name of state Cape Fear
3 management/river basin
U.S.Geological Survey
Tii.� 8-digit hydrologic 03030002
Ce cataloging unit code
Critical low flow(acute) cfs cfs cfs
Critical low flow(chronic) - cfs cfs cfs
Total hardness at critical mg/L of mglL of mg/L of
low flow CaCO3 CaCO3 CaCO3
3.8 Provide the following information describing the treatment provided for discharges from each outfall.
Outfall Number 001 Outfall Number ow Outfall Number ow
Highest Level of ❑ Primary 0 Primary 0 Primary
Treatment(check all that 0 Equivalent to ❑ Equivalent to 0 Equivalent to
apply per outfall) secondary secondary secondary
10 Secondary 0 Secondary 0 Secondary
0 Advanced 0 Advanced 0 Advanced
0 Other(specify) ❑ Other(specify) 0 Other(specify)
c
0
c Design Removal Rates by Pittsboro Phase 1 CP WRC Phase 1 CP WRC-Phase 2
Outfall
0
0
el
BOD5 or CBOD5 gg % 98 % 98
Ea>
TSS 99 % 98 % 98
f-
❑Not applicable 0 Not applicable 0 Not applicable
Phosphorus unknown % 98 % 98
0 Not applicable 0 Not applicable 0 Not applicable
Nitrogen unknown % 92 % 92
Other(specify) 0 Not applicable 0 Not applicable 0 Not applicable
EPA Form 3510-2A(Revised 3-19) Page 7

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
New Facility NC0020354 Water Recovery Center OMB No.2040-0004
3.9 Describe the type of disinfection used for the effluent from each outfall in the table below. If disinfection varies by
season,describe below.
0
ai
0
U
0
Outfall Number 001 Outfall Number Outfall Number
- Disinfection type
0 uv
N
0
ca
Seasons used
m All
Dechlorination used? ❑✓ Not applicable ❑ Not applicable ❑ Not applicable
❑ Yes ❑ Yes ❑ Yes
❑ No ❑ No ❑ No
3.10 Have you completed monitoring for all Table A parameters and attached the results to the application package?
❑ Yes ❑� No
3.11 Have you conducted any WET tests during the 4.5 years prior to the date of the application on any of the facility's
discharges or on any receiving water near the discharge points?
❑ Yes © No Ht SKIP to Item 3.13.
3.12 Indicate the number of acute and chronic WET tests conducted since the last permit reissuance of the facility's
discharges by outfall number or of the receiving water near the discharge points.
Outfall Number Outfall Number Outfall Number
Acute Chronic Acute Chronic Acute Chronic
Number of tests of discharge
water
Number of tests of receiving
water
3.13 Does the treatment works have a design flow greater than or equal to 0.1 mgd?
❑✓ Yes ❑ No H► SKIP to Item 3.16.
0 3.14 Does the POTW use chlorine for disinfection,use chlorine elsewhere in the treatment process,or otherwise have
reasonable potential to discharge chlorine in its effluent?
❑ Yes 4 Complete Table B,including chlorine. ✓❑ No 4 Complete Table B,omitting chlorine.
3.15 Have you completed monitoring for all applicable Table B pollutants and attached the results to this application
package?
❑ Yes El No
3.16 Does one or more of the following conditions apply?
• The facility has a design flow greater than or equal to 1 mgd.
• The POTW has an approved pretreatment program or is required to develop such a program.
• The NPDES permitting authority has informed the POTW that it must sample for the parameters in Table C,must
sample other additional parameters(Table D),or submit the results of WET tests for acute or chronic toxicity for
each of its discharge outfalls(Table E).
❑ Yes->Complete Tables C,D,and E as ❑ No 4 SKIP to Section 4.
applicable.
3.17 Have you completed monitoring for all applicable Table C pollutants and attached the results to this application
package?
❑ Yes ❑✓ No
3.18 Have you completed monitoring for all applicable Table D pollutants required by your NPDES permitting authority and
attached the results to this application package?
El Yes No additional sampling required by NPDES
permitting authority.
EPA Form 3510-2A(Revised 3-19) Page 8

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
New Facility NC0020354 Water Recovery Center OMB No.2040-0004
3.19 Has the POTW conducted either(1)minimum of four quarterly WET tests for one year preceding this permit application
or(2)at least four annual WET tests in the past 4.5 years?
❑ Yes ❑ No 4 Complete tests and Table E and SKIP to
Item 3.26.
3.20 Have you previously submitted the results of the above tests to your NPDES permitting authority?
❑ Yes ❑ No 4 Provide results in Table E and SKIP to
Item 3.26.
3.21 Indicate the dates the data were submitted to your NPDES permitting authority and provide a summary of the results.
Date(s)Submitted Summary of Results
(MM/DD/YYYY)
a
3.22 Regardless of how you provided your WET testing data to the NPDES permitting authority,did any of the tests result in
toxicity?
0 Yes 0 No 4 SKIP to Item 3.26.
a) 3.23 Describe the cause(s)of the toxicity:
C,
w
3.24 Has the treatment works conducted a toxicity reduction evaluation?
❑ Yes 0 No 4 SKIP to Item 3.26.
3.25 Provide details of any toxicity reduction evaluations conducted.
3.26 Have you completed Table E for all applicable outfalls and attached the results to the application package?
❑ Yes ❑ Not applicable because previously submitted
information to the NPDES •ermittin• authorit .
SECTION 4.INDUSTRIAL DISCHARGES AND HAZARDOUS WASTES(40 CFR 122.21(j)(6)and(7))
4.1 Does the POTW receive discharges from SIUs or NSCIUs?
❑ Yes ❑ No 4 SKIP to Item 4.7.
4.2 Indicate the number of SIUs and NSCIUs that discharge to the POTW.
Number of SIUs Number of NSCIUs
N
O
2 4.3 Does the POTW have an approved pretreatment program?
_ ❑ Yes 0 No
a
4.4 Have you submitted either of the following to the NPDES permitting authority that contains information substantially
identical to that required in Table F:(1)a pretreatment program annual report submitted within one year of the
application or(2)a pretreatment program?
y ❑ Yes 0 No 4 SKIP to Item 4.6.
0
4.5 Identify the title and date of the annual report or pretreatment program referenced in Item 4.4.SKIP to Item 4.7.
U)
a
c
— 4.6 Have you completed and attached Table F to this application package?
O Yes 0 No
EPA Form 3510-2A(Revised 3-19) Page 9

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
New Facility NC0020354 Water Recovery Center OMB No.2040-0004
4.7 Does the POTW receive,or has it been notified that it will receive,by truck,rail,or dedicated pipe,any wastes that are
regulated as RCRA hazardous wastes pursuant to 40 CFR 261?
❑ Yes ❑✓ No 4 SKIP to Item 4.9.
4.8 If yes,provide the following information:
Annual
Hazardous Waste Waste Transport Method Amount of Units
Number (check all that apply) Waste
Received
❑ Truck ❑ Rail
❑ Dedicated pipe ❑ Other(specify)
C
0
U
❑ Truck ❑ Rail
11)
❑ Dedicated pipe ❑ Other(specify)
0
-0
j R ❑ Truck ❑ Rail
_ ❑ Dedicated pipe ❑ Other(specify)
4.9 Does the POTW receive,or has it been notified that it will receive,wastewaters that originate from remedial activities,
y including those undertaken pursuant to CERCLA and Sections 3004(7)or 3008(h)of RCRA?
❑ Yes ElNo 4 SKIP to Section 5.
n 4.10 Does the POTW receive(or expect to receive)less than 15 kilograms per month of non-acute hazardous wastes as
- specified in 40 CFR 261.30(d)and 261.33(e)?
❑ Yes 4 SKIP to Section 5. ❑ No
4.11 Have you reported the following information in an attachment to this application:identification and description of the
site(s)or facility(ies)at which the wastewater originates;the identities of the wastewater's hazardous constituents;and
the extent of treatment,if any,the wastewater receives or will receive before entering the POTW?
❑ Yes ❑ No
SECTION 5.COMBINED SEWER OVERFLOWS(40 CFR 122.21(j)(8))
5.1 Does the treatment works have a combined sewer system?
a ❑ Yes ❑� No 4SKIP to Section 6.
5.2 Have you attached a CSO system map to this application?(See instructions for map requirements.)
Q ❑ Yes ❑ No
5.3 Have you attached a CSO system diagram to this application?(See instructions for diagram requirements.)
U.) ElYes ElNo
EPA Form 3510-2A(Revised 3-19) Page 10

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
New Facility NC0020354 Water Recovery Center OMB No.2040-0004
5.4 For each CSO outfall,provide the following information.(Attach additional sheets as necessary.)
CSO Outfall Number CSO Outfall Number CSO Outfall Number
City or town
0
w
•Q- State and ZIP code
u
0
o County
R
II
o Latitude11
0 11 °
o °
co Longitude °
c>
Distance from shore ft. ft. ft.
Depth below surface ft. ft. ft.
5.5 Did the POTW monitor any of the following items in the past year for its CSO outfalls?
CSO Outfall Number CSO Outfall Number CSO Outfall Number
Rainfall ❑ Yes 0 No 0 Yes 0 No ❑ Yes ❑ No
o)
c
`0 CSO flow volume 0 Yes ❑ No ❑ Yes ❑ No ❑ Yes ❑ No
ng
0 CSO pollutant
2 ❑ Yes ❑ No ❑ Yes 0 No ❑ Yes ❑ No
o concentrations
co
Receiving water quality ❑ Yes ❑ No ❑ Yes ❑ No ❑ Yes 0 No
CSO frequency ❑ Yes ❑ No ❑ Yes ❑ No ❑ Yes ❑ No
Number of storm events ❑ Yes ❑ No 0 Yes ❑ No ❑ Yes ❑ No
5.6 Provide the following information for each of your CSO outfalls.
CSO Outfall Number CSO Outfall Number CSO Outfall Number
CO
Number of CSO events in events events events
y the past year
R
cAverage duration per hours hours hours
c event 0 Actual or 0 Estimated 0 Actual or 0 Estimated 0 Actual or 0 Estimated
0
w
o Average volume per event million gallons million gallons million gallons
c`no 0 Actual or 0 Estimated 0 Actual or 0 Estimated 0 Actual or 0 Estimated
Minimum rainfall causing inches of rainfall inches of rainfall inches of rainfall
a CSO event in last year 0 Actual or 0 Estimated 0 Actual or 0 Estimated 0 Actual or 0 Estimated
EPA Form 3510-2A(Revised 3-19) Page 11

EPA Ide+11oe1on Nutter NPOES Perna Nutter Facility Name Form Approved 0310919
New Facility NC0020354 Water Recovery Center OMB No.2040-0004
5.7 , Provide the information in the table below for each of your CSO outfalls,
CSO Outfal Number_ CSO Outfit Number CSO Outfall Number_
Receiving water name
Name of watershed)
stream system —
U.S.Soil Conservation 0 Unknown ❑Unknown 0 Unknown
Service 14-digit
se watershed code
(if known)
Name of state
re manaoementlriver basin
U.S.Geological Survey 0 Unknown 0 Unknown ❑Unknown
8-Digit Hydrologic Unit
Code(if known)
Description of known
water quality impacts on
receiving stream by CSO
(see instructions for
exam'les
SECTION 6.C CKLIST AND CERTIFICATION STATEMENT(40 CFR 122.22(a)and(d))
6.1 In Column 1 below,mark the sections of Form 2A that you have completed and are submitting with your application.For
each section,specify in Column 2 any attachments that you are enclosing to alert the permitting authority.Note that not
all applicants are required to provide attachments.
Column 4—.,-,,�., ;._ Column 2
1.71 Section 1:Basic Application
Information for All Applicants ❑ wt variance request(s) Ej w/additional attachments
❑ Section 2:Additional 0 wl topographic map 0 wl process flow diagram
Information ❑ wl additional attachments
0 wl Table A 0 wl Table D
0Section 3:Information on 0 wl Table B ❑ wl Table E
c E• ffluent Discharges
t: ❑ wl Table C ❑ w/additional attachments
i Section 4:Industrial ❑ wl SIU and NSCIU attachments ❑ wl Table F
H 0 D• ischarges and Hazardous
Wastes ❑ w/additional attachments
cc ri❑ Section 5:Combined Sewer
❑ wl CSO map ❑ wl additional attachments
Overflows ❑ wl CSO system diagram
c.3
A ❑ Section 6:Checklist and ❑ w/attachments
Certification Statement
6.2 Certification Statement
1 certify under penalty of law that this document and all attachments were prepared under my direction or supervision in
accordance with a system designed to assure that qualified personnel properly gather and evaluate the information
submitted.Based on my inquiry of the person or persons who manage the system,or those persons directly responsible
for gathering the information,the information submitted is,to the best of my knowledge and belief,true,accurate,and
complete.lam aware that there are significant penalties for submitting false information,including the possibility of fine
and imprisonment for knowing violations.
• Name(print or type first and last name) Official title
1)John Poteat&2)Michael Myers 1)Pittsboro Director 2)WRC Manager
• Sign Date signed
1
III 1 `�' /
_ i signed
1r/ 5-//2/Zv?c,
• i EPA Form 3510-2A(Revised 3-19) Page 12
•
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p�h ^,00( Sources:Esri,HERE,Garmin, Intermap,increment P Corp.,GEBCO, USGS,FAO, NPS, S
NRCAN, GeoBase, IGN, Kadaster NL, Ordnance Survey, Esri Japan,METI, Esri China (Hong 1 in = 1,200 ft
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Sources:Esri, HERE,Garmin, Intermap,increment P Corp.,GEBCO, USGS,FAO, NPS,
NRCAN, GeoBase, IGN, Kadaster NL,Ordnance Survey, Esri Japan,METI, Esri China (Hong 1 in = 1,400 ft
Kong).swisst000.©OpenStreetMap contributors,and the GIS User Community

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NRCAN,GeoBase, IGN, Kadaster NL,Ordnance Survey, Esri Japan,METI, Esri China (Hong 1 in = 1,500 ft
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Sources:Esri, HERE,Garmin, Intermap,increment P Corp., GEBCO, USGS,FAO, NPS,
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Process Flow Diagram Narrative
Because of the changes that are proposed to the Pittsboro WWTP,two flow diagrams have been
provided that show the two phases. Phase 1 will be the construction of the new Chatham Park Water
Recovery Center(CP WRC) and connection of this plant's effluent to the Pittsboro plant discharge Outfall
001. Phase 2 will be the conversion of the Pittsboro WWTP into a pump station that will pump raw
sewage to the Big Buffalo WWTP in Sanford.
A process flow diagram for the existing Pittsboro WWTP could not be located, so staff have diligently
dug through old files and added their experience to document the current plant operation.The exact
location of all existing piping could not be determined but the connections are accurate. For phase 1,
the plan set for the tie-in of the CP WRC to the Pittsboro WWTP has not yet been approved by the Town,
so only the most recent proposal has been shown.The CP WRC is under construction with permit
#WQC0039375 and the force main for the effluent discharge is also under construction with permit
#40514.The raw sewage force main is also under construction on this same permit#40514 but has been
shown on the Phase 2 diagram. It is intended to be operational for use if needed during start-up of the
CP WRC. After the new plant is operational,this line will not be used until Phase 2 is complete. For
phase 2, plans for the pump station and the force main to Sanford have been submitted to DWI but not
yet approved, so only the most recent proposal has been shown.
Background
The Pittsboro Wastewater Treatment plant was originally constructed in 1977 and upgraded in 1988 and
2010. In 1988, an additional aeration basin, clarifier,filters, mechanical bar screen, and UV system were
added. In 2010, EQ storage basins and a new UV disinfection system was installed. In April of 2010 the
Town of Pittsboro began supplying the 3M Corporation reclaimed water for its manufacturing operation.
The WWTP design capacity is 0.75 mgd and the reclaimed water pump station is approximately 0.3 mgd.
Current Treatment Process
Wastewater enters the Pittsboro WWTP at the influent channel and large trash items are removed with
a mechanical bar screen. Wastewater then flows to the influent wet well and is pumped through a
Magnetic Flow meter and to either of the Aeration Basins or is diverted to the EQ pump station and
pumped to the EQ storage basins.The water enters two identical treatment trains for biological
treatment and clarification. The clarified water from both units is chemically treated for phosphorus,
flows to the sand filtration units, and then passes through UV disinfection. UV operation is controlled by
a signal from the Influent flow meter.The treated effluent is either discharged to Roberson Creek or
chlorine is added and it is pumped to the 3M Manufacturing Facility as reclaimed water.
Excess flow that gets diverted to the EQ basins for storage is returned to the influent pump station to
begin treatment, usually overnight. The reject water from the sand filters and the sludge thickener is
also returned to the influent pump station. However, it should be noted that this water passes through
the influent flow meter again and the EQ basin storage water does not.
The plant operates at a controlled flow from 230—521 gpm. (maximum plant design flow is 521 gpm)
When the EQ storage basins are full,the plant is operated in level mode with flow of 521-1250 gpm
split between the two basins. When the plant is switched into level mode, air is shut down on the exit
side of each aeration basin,with air remaining on the influent side for treatment.The sand filters are

bypassed to prevent damage and the UV system is placed in manual mode and set to 100%for both
banks.
Biosolids Disposal
Biological solids are removed from the plant on a daily basis,treated with polymer, and thickened with a
rotary drum thickener. The solids are then land applied as fertilizer for animal feed crops. Land
Application permit#WQ0020019.
Phase 1-Chatham Park WRC
Construction is almost complete on the CP WRC.The 12" force main that will carry treated effluent from
the new CP WRC to the Pittsboro WWTP outfall is also under construction.The final plans for the
connection of this force main to the Pittsboro WWTP have not yet been completed, but the most recent
plan revision has been used to complete the process flow diagram.
The force main will drop into a small vault to dissipate the water velocity and the vault will connect
directly to the original (now abandoned) U.V.trough.This water will flow into the splitter well with the
Pittsboro effluent where the total combined flow can be sampled.Total flow can then be directed either
to the reclaimed water pump station or through the Parshall Flume. If sent to the reclaimed pump
station, it will be treated with chlorine before leaving the plant. Otherwise,total flow will be metered
through the flume before discharging into Roberson Creek. No modifications to the 16" discharge pipe
or the streambank have been proposed.
NOTE:the 12" raw sewage line from CP WRC is under construction (permit#40514) and being installed
parallel to the treated effluent line from CP WRC.This line will only be used if needed during start-up of
the CP WRC. If there are difficulties during start-up and the ORC does not want to discharge to Roberson
Creek,the effluent can be diverted into the raw sewage line and sent to the headworks of the Pittsboro
WWTP for treatment.After the new plant is operational,this line will not be used until Phase 2 is
complete.
Phase 2—Pittsboro Pump Station with Force Main to Big Buffalo WWTP
Construction plans are under review by DWI for the conversion of the Pittsboro WWTP into a pump
station that would send untreated effluent to the Big Buffalo WWTP in Sanford.While the final plans
have not yet been approved, the most recent plans have been used to complete the second process
flow diagram.
Both the Pittsboro WWTP&the CP WRC will operate together until the pump station and force main are
completed. Once the pump station is finished,aeration basins will be converted into additional EQ
storage.
All raw sewage currently flowing to the Pittsboro WWTP (up to 0.75 mgd) along with an additional 1.25
mgd of raw sewage from future Chatham Park development,will be pumped to Sanford.This will
remove Pittsboro's portion of the discharge from Outfall 001. Only 0.499 mgd of effluent from CP WRC
would then discharge to Outfall 001.

}
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t
McKEVI&CREED
Chatham Park
Decentralized Water Resource Recovery Facility (WRRF)
Preliminary Basis of Design Report
Revision 7: July 31, 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.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) 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

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 Summary
Parameter Outfall No. 1 Outfall No. 2
Maximum Day Capacity 1.249 MGD ligiW 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
the existing 0.75 MGD Town of Pittsboro WRF 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 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
BOD5 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
':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
throughOOutfall 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
BODs <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 NW NA
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 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
Equipment Phase I Phase II
Fine Screen 2 0
Washer/Compactor 1 0 __
Screw Conveyor 1 0
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 P 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
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
i

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
1 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
10

Disinfection System
Once flow has passed through the membranes via the permeate pumps, flow will
be directed through a system of closed-vessel UV modules for disinfection. The
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
13

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 1
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 NaOC1 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
111 2 Membrane Cleanin
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

WAS DECANT
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IP •
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TROJAN Coif
PROJECT DESCRIPTION
Project Name Pittsboro, NC
Trojan Project Number 511529
Specification Section 11390
Peak Flow 1.875 MGD !%ur -ercr ih/y te.,ts u� r. /000 G,... = I. Yyo 1
Se UV'. ,SirJff.Y 's L'er 7c /`tie wO r. /.rye e"✓
Lscry,cFA,
Average Flow 0.75 MGD 7Z, ;s ,tie / 'i$ we Can 4a ••.r .outrc// O.'A c
Outmm.// 09 z. 4'e Jots ,v.r' e..:s>'. 4:.ry.tJ ..../ re
o. 71 ,7AL__,,, "._.ly.
Minimum Flow 0.1 MGD
Total Suspended Splids <30 mg/L Based on a 30 Day Average
J
Percent Transmittance 65%Minimum at 253.7nm
Maximum Mean Particle Size 30 Microns
Disinfection Standards <200 Fecal Coliform / 100mL Based on a 30 Day Geometric Mean
<400 Fecal Coliform / 100mL Based on a 7 Day Geometric Mean
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SECTION 113gn
ULTRAVIOLET DISINFECTION EQUIPMENT
:)
PART 1 GENERAL
V/!1 . 01 SECTION INCLUDES
8.A. Furnish all labour, materials, equipment and appurtenances
required to provide a fully operational open channel,
gravity flow, high intensity low pressure lamp,
ultraviolet (UV) disinfection system complete with an
automatic mechanical/chemical or mechanical cleaning
system, electronic ballasts, programmable logic controller
(PLC) -based control equipment and accessories in
compliance with the following specifications and as shown
on the Contract Drawings. Disinfection system shall be
capable of disinfecting filtered secondary effluent to
meet the water quality standards listed in this section.
B. Contractor shall provide conduits and conductors for
electrical power, controls and communication, to conne, t
UV equipment as shown on the Contract Drawings. This
includes, but is not limited to:
1 . Connecting power to the system from the main power
/ supply disconnect switch.
2 . Connecting the system control center (SCC) , level
sensors, hydraulic or pneumatic systems, power
distribution centers (PDCs) or equivalent,
uninterruptible power supply (UPS) , and field Limit
switches, where applicable .
✓3 . Connecting communications at the communications
junction box.
�9 . Each named manufacturer has different arrangements of
UV ballasts, cleaning equipment, and instrumentation;
and the Contractor shall coordinate with the
manufacturer to determine proper wiring requirements
for the UV disinfection system furnished .
N/1 . 02 RELATED SECTIONS
,A. The specification sections 1i ted below ar an ntegLa
part of this equipment specification and the Contra t r
shall be responsible for providing the-- tion to (he
equipment suppliers :
1 113 ,0 1

1 . Section 01300 - SUBMITTALS
2 Section 01 400 - nUAT,TTY C ONTRnf,
3. Section 01600 - MATERIAL AND EQUIPMENT
4 . Sectiton 01640 EQUIPMENT-GENERAL
5. Sectilon 01660 - PLANT STARTUP AND INITIAL OPERATION
6. Section 05500 - MISCELLANEOUS FABRICATIONS
7 . Section 05531 - GRATING AND FLOOR PLATES
8 . Section 09900 - PAINTING
i
✓B. All electrical equipment and wiring shall be in full
conformance with Division 16, Electrical Specifications.
v/1 . 03 DESIGN REQUIREMENTS
✓ A. System Description
11 . Number of Channels - One. Channel shall be capable of
fully disijnfecting the entire peak flow of 1. 875 mgd.
I
y(2. Concrete Channel Dimensions - As shown on drawings
Apprcjximately 19 inches wide by 48 inches deep.
a. C ntractor shall install grout per the
m nufacturer' s instructions as necessary to
a hieve the required finished channel dimensions
a required to provide flow velocity and detention
tjime through the UV disinfection channel over the
gill range of design flows in order to deliver
proper system performance in accordance with
P ragraph 1 . 04 .
I
(3 . Maxirrlum Liquid Depth 17 . 75 inches.
*-4 . Number of Banks Per Channel Two (one duty, one
stancXby) .
s
✓ 5. Number of Modules Per Bank Minimum of 3 .
1
16. Numbi�r of Lamps Per Module - Minimum of 4 (minimum of
12 to=tal for each bank) .
J7 . Number of UV detection Systems- Minimum of 2 (one per
bank).
i
18. Number of Power Distribution Systems Minimum of 2
(one per bank)
I
9: The UV disinfec ion system SCC shall be equipped with
a UPS1 supplied by the UV disinfection ystem
manufacturer. The UPS shall maintain an uninterrupted
81245. 30 11390-2

power upply to the system controls in the event
normal power supply is interrupted.
•/C. The equipment shall be designed such ch that the unit may
operate continuously under the peak design flow without
causing any harm t the equipment .
D. The UV banks shall be supplied preassembled to the
greatest extent possible for easy installation.
J E. The UV system will be designed to deliver a minimum UV dose
of 24, 000 µWs/cm` at 1 . 1 MGD with one duty UV bank in
operation and one on standby, in effluent with a UV
Transmission of 65% at end of lamp life (EOLL) after
reductions for quartz sleeve fouling. The basis for
evaluating the UV dose delivered by the UV system will be the
independent third party bioassay, without exception .
Bioassay validation methodology to follow protocols described
in NWRI Ultraviolet Disinfection Guidelines for Drinking
Water and Water Reuse (May 2003) .
The UV Dose will be adjusted using an end of lamp life factor
of 0. 5 to compensate for lamp output reduction over the time
period corresponding to the manufacturer' s lamp warranty.
The use of a higher lamp aging factor will be considered only
upon review and approval of independent third party verified
data that has been collected and analysed in accordance with
protocols described in NWRI Ultraviolet Disinfection
Guidelines for Drinking Water and Water Reuse (May 2003) .
The UV Dose will be adjusted using a quartz sleeve fouling
factor of 0. 8 when sizing the UV system in order to
compensate for attenuation of the minimum dose due to sleeve
fouling during operation. The use of a higher quartz sleeve
fouling factor will be considered only upon review and
approval of independently verified data that has been
collected and analysed in accordance with protocols described
in NWRI Ultraviolet Disinfection Guidelines for. Drinking
/ Water and Water Reuse (May 2003) .
s/ F. Independent Validation for use of higher factors (lamp
aging and sleeve fouling) must be submitted to the
Engineer a minimum of fifteen (1 ) days prior t bid.
d G. The lamp array configuration sh 1 be a uniform array w.i t ]c
all lamps pa ! llel h other and to he f ow. The
lamps shall be evenly spaced in horizontal and verti al
rows with cent rl in spa ing not to exceed . 2 inche and
equal in both di ; Li ns .
24)
111 . 10 1 i i

✓H. The system shall be designed to minimize power consumption
while meeting the speci.fipr1 rii si n1ect.ion requirements by
automatically dimming bulbs and de-energizing banks based
on a real time flow signal .
J 1 . 04 PERFORMANCE REQUIREMENTS
,/A. Provide equipment that shall disinfect an effluent with
the following characteristics :
1 . Peak design WWTP flow 1.875 mgd
2 . Design 30-day average WWTP flow 0.75 mgd
3. Minimum WWTP flow 0. 1 mgd
4 . 30-day average total suspended solids 30 mg/L
5. UV transmittance @ 253. 7 nm 65 percent
fB. The following treatment processes precede the UV
disinfection system: aeration basins, secondary
clarifiers, and sand filters. Effluent from the sand
filters is the influent to the UV system.
✓C. The ultraviolet disinfection system shall produce an
effluent that meets the following discharge permit
effluent limits :
1 . 200 and 400 fecal coliforms per 100 mL for any 30-day -
and 7-day consecutive geometric mean of daily f
samples, respectively.
2 . Effluent standards shall be guaranteed for influent
fecal coliform counts of less than 200, 000 .
ID. The equipment design shall allow disinfection requirements
to be met through the entire range of flow rates specified
using one channel and the number of banks as listed below
Flow (mgd) 11 . 875
Number of Banks ! 2 (1 duty, 1 standby) at 1 . 1 mgd [
J E. The system shall be able to continue providing
disinfection while replacing UV lamps, quartz sleeves,
ballasts and while cleaning the UV lamp sleeves.
4-F The UPS shall be capable of providing all system controls
with power for at least 10 minutes in the event of a power
failure . Submit product information verifying compliance.
AG. The headlos across the UV reactor at 1 . 875 mgd total flow
shall not ex ed 8 inch t tal across the channel
8124 30 11390-4

EPA Identification Number WOES Penult Number Facility ty Name OutfaJ Number
_ -- Approved 03N5r19
N00020354 j Pittsboro W WTP CNDOMB No.20A0-0004
TABLE A.EFFLUENT PARAMETERS FOR ALL POTWS
Maximum Daly Discharge Average Daily Discharge Analytical ML or MDL
PoRutaM Value Units Value Units Nub of Methods (Include units)
Samples
Biochemical oxygen—demand /r1oonfLY AV6. wEEkLY '4V6-.
m BODs or 0 CBODs Novl-March31=10.0 mg/L Novl-March31=15.C.mg/L 1 156(3/week) ;SM 5210 B-2011 2 PAX
n one t-OcT. 1(report }�! �D■►'�� APRs-ocr7.S i0 �cj/t _ - ---
0 PAL
Fecal conform 200 MPN/100mL 400 MPN/100mL 3/week colSert 18 1.0 Mil
INa£KtY A116-
•
Design flow rate 0.75 mild 0.49 me continuous
pH(minimum) 6 so
pH(maximum) 9 su
Temperature(winter) I n/a n/a
Temperature(summer) n/a n/a
Total suspended solids(TSS) 30 mg/L 45 i mg/L 3/week 5M25400-2011 2.5 0I
�eNlttcY AIM _ . -FKL-V AL/6
in
1 SamplIng shall be conducted according to sufficiently sensitive test procedures(1.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I,subchapter N or O.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2A(Revised 3-19) Page 13

EPA idariicaion Number WOES Perrmit Number Faddy Name Outten Rumba' Far Approved 03/05/19
N00020354 PittSboroWWTP 00 OMB No.2040-0004
TABLE B.EFFLUENT PARAMETERS FOR ALL POTWS WITH A FLOW EQUAL TO OR GREATER THAN 0.1 MOD
Maximum Daily Discharge Average Daily Discharge _ Analytical ML or MDL
Pollutant Value lh Value Units Number of Method1 (include units)
Samples
Ammonia(as N) 2.0 mg/L 66 0 mg/L 3/week EPA 350.1 0.045 O ML
lhognity Avo• JOEact AVF_ 011DL
Chlorine _ 0MLJ
(total residual,TRC 2 ❑MDL
Dissolved oxygen 6.0 rn&& 3/week 5M4500 OG-2011
DA1cy 'AMA/. OMDL
Nitrate/nitrite monitor&report monitor&report 1/week EPA 353.2 0.41 ®r DL
I�IdahI nitrogen monitor&report monitor&report 1/week I EPA 351.2 0.26 ®A Mt
Oil and grease n/a n/a o ML
0 MDL
Phosphorus April-Oct 32 112 I—b.fT6f; .:j 1/week EPA 365.4 0.025 6 MLezThicr_ruey-M
❑ML
Total dissolved solids n/a n/aCI MDL
1
I Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I,subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
2 Facilities that do not use chlorine for disinfection,do not use chlorine elsewhere in the finatrtrent process,and have no reasonable potential to discharge chlorine in their effluent are not
required to report data for chlorine.
EPA Form 3510-2A(Revised 3-19) Page 15

/-7.:‘
it* ENCO Laboratories
Accurate. Timely. Responsive. Innovative.
102-A Woodwinds Industrial Court
Cary NC,27511
Phone: [phone] FAX: [phone]
Friday,July 26, 2019
TOWN OF PITTSBORO(T0009)
Attn: Jamie Mclaurin
PO BOX 759
PITTSBORO, NC 27312-
RE: Laboratory Results for
Project Number: [none], Project Name/Desc: Priority Pollutant Scan
ENCO Workorder(s): CC11263
Dear Jamie Mclaurin, l
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,
/ --1."--:,/: -7
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

CI CI
\ _ _
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
Volatile Organic Compounds by GCMSII
^-EACO Cry certified anayte[NC 5911
Analvte fCAS Numberl Raids slag Units DE MDL £21 Retch Method Analyzed 9Y Batts
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 9G10014 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-Dichbropropene[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
Tetrachloroethene[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
+ 1:CL Agfudts RE &dal& %Rec %Rec limits lath Method Analyzed III dates
4-8romofluorobenzene 53 1 50.0 107% 41-142 9G10014 EPA 624.1 07/10/19 19:04 MRK
4-Bromofuorobenzene 53 1 50.0 107% 41-142 9G10014 EPA 624.1 07/10/1919:04 MRK
Dibromofluoromebhane 48 1 50.0 97% 53-146 9610014 EPA 624.1 07/10/19 19:04 MRK
Dibromofluoromebhane 48 1 50.0 97% 53-146 9610014 EPA 624.1 07/10/19 19:04 MRK
Toluene-d8 49 1 50.0 98% 41-146 9610014 EPA 624.1 07/10/19 19:04 MRK
Toluene-d8 49 1 50.0 98% 41-146 9G10014 EPA 624.1 07/10/19 19:04 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
Semivolatile Organic Compounds by GCMSII
^-ENO)Cary cw,tified anatyle[NC 591]
Analvte FCAS Numberl Results flag Units RE MU pDI latch Met s& AnalyzedIy b412f
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-Trichbrophenol[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-Dinitrophenoi[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-Chioronaphthalene[91-58-7]^ 3.2 U ug/L 1 3.2 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
2-Chiorophenol[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[91-941]^ 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-Chioro-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-chbroethyl)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[8466-2]^ 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 DFM
Hexachlorobutadiene[87-68-3]^ 4.1 U ug/L 1 4.1 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
Hexachlorocyclopentadiene[77-47-4]^ 3.8 U ug/L 1 3.8 10 9G15019 EPA 625.1 07/16/19 22:05 DFM
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

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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
Semivolatile Organic Compounds by GCMSII
^-ENCO Cary certified analyze[AC 591]
Analvte ICAS Numberl Rands flag Units RE NU PDI. latch Method Analyzed la Nam
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
Immzertzt Results Qf .Se a Lvi _Yaw %Roc Limns BdG71 Mated A Ward BY &deg
2,4,6-Tnbromophenol 100 1 100 103% 47-128 9615019 EPA 625.1 07/16/1922:05 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 9615019 EPA 625.1 07/16/1922:05 DFM
Pheno/-d5 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 DFM
Metals by EPA 200 Series MethodsII
^-ENCO Cary certified analyte[NC 591]
Apalvte ICAS Numberl Res lt8 Flag Units DE MQl WI Batch Method Analyzed lig ]dotes
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 JDH
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 JDH
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 J 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 9G12014 EPA 200.8 07/16/19 13:18 CMK
^ ug/L 1 1.90 10.0 9G12022 EPA 200.7 07/16/19 11:25 JDH
Silver[7440 22-4] 1.90 U
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[AC 5911
Analvte ICAS Numberl Results flag Units RE kW!. EQL Batch Method Analuall BY Naas
Ammonia as N[7664-41-7]^ 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

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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
ti
Classical Chemistry Parameters
^-ENCO Orlando certified ana/yte[NC 424.1
Analvte (CAS Numberl Results flag Units DF MDL POL 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 r
^-ENCO Jacksonville certified ana/yte[NC 4421
Analvte (CAS Numberl Results Flag Units PE MQL E9J Batch Method Analyzed By 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

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FLAGS/NOTES AND DEFINITIONS
B The analyte was detected in the associated method blank.
D The sample was analyzed at dilution.
J 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
QO 10775 Central Port Dr 4810 Executive Park Court,Suite 111 102-A Woodwinds Industrial Cr
1 Orlando.FL 32824 Jacksonville,FL 32216-6069 Cary,NC 27511
[phone] Fax[phone] [phone] Fax [phone] 19131 467 3090 Fax [phone] www.encolabs m
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Client Name Protect Number Requested Analyses Requested Turn/r ,, cRp TOWN OF PITTSBORO (T0009) [none] N Times O-
F
Address Protect Name,'Desc a
PO BOX 759 Priority Pollutant Scan > co Note Rush requests
acceptance by the Inardy Ili y
in
City/ST/L PO a i Billing Into - _ —�-- N N
PIT�fS60R0, NC 27312- 2 a) o� Standard
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Tel Fax Reporting Contact -- Q) X -p o Q>
[phone] O- Jamie Mciaunn o Z o —I m a
Samplerlsl Name,Affiliation(Print) BillingContact
v Q p. a o = ! I" m v Expedited
Accounts Payable Q a a �o CcD a�co �i g Due )
Sampler(s)Signature Site Location/Time Zone V' '�' ►C) m g a e Q) --_` -�-- --- -
CD A O ad L Lab Workorder
CO CO CD Z` ' " " ° a. CC11263
Preservation(See Codes/(Combine as necessary)
Collection Matrix Total a of I
Item a Sample ID(Field Idenlificationi Collection Date Time Comp r Grab (see codes) Containers Sample Comments
Effluent 7/!oil cl:S C VVW 14 X X X X X X X X X X
Low Level Mercury Blank 7//°/Il ?:l5 C WW 1 X j
-
1 --
Ii
t
i
. -7111111
I
%//�. <--Total#of Containers
Sample Kit Prepared y DateiTime Reli 'shed By/I�G ,4 \ Date-Time Received By 'Dal ime
-- (C\ 7//q/(7 0:46,7 "if, -)..,))/./i q
,c, 17 5.(_,
Comments/Special Reporting Requirements elmquished By Date/Time Received y DathtTime
Relinquisneo By Date/Time Received By Dale.Time
Cooler les 8 Temps on Recei _ Condition Upon Receipt
' l _ Acceptable Unacceptable
Matrix GW-Groundwater SO-Sal DW-Drinking Water SE-Sediment SW-Surface Water WW-Wastewater A-Air 0-Other(detail in comments) Preservation:I-Ice H-HCI N-HNO3 S-H2SO4 NO-NaOH 0-Other(detail in comments;
Note All samples submitted to ENCO Labs are in accordance with me terms and conditions listed on the reverse or this form,unless prior written agreements exist

ENVIRONMENTAL CONSERVATION LABORATORIES CHAIN-OF-CUSTODY RECORD www.encolabs,—y:
(EISJE O 10775 Central Port D' 4810 Executive Park Court,Suite 111 102-A Woodwinds Industnal Ct
• _ Orlando.FL 32824 Jacksonville.FL 32216-6069 Cary.NC 27511 �
•
• 1407)826-5314 Fax[phone] [phone] Fax [phone] [phone] Fax[phone] Page of o
-OD
Client Name Protect Number Requested Analyses Requested Tung•�� CO
TOVVN OF PITTSBORO (T0009) [none] Times a03
Address Prorect NameiDesc
PO BOX 759 Priority Pollutant Scan Note.Rush requests acceptanceoy_ the acliTt._
City/ST/Zip PO a:Billing Into
PI TTSBORO, NC 27312 U Standard
Tel Fax Reporting Contact *1'
[phone] ('(- Jamie Mclaunn
N Expedited
Sampler(s)Name.Affiliation(PnnO BillingContact
Accounts Payable co Due r
CO
Sampler(s)Signature Site Location,Time Zone
0 Lab Workorder
~ _ CC11263
Preservation;See Codes)(Combine as necessary(
Collection Matrix Total w of
Item a Sample ID t Field ldentilicationi Collection Date Line Comp Grab (see codes) Containers I Sample Comments
r
Effluent WW 14 X
Low Level Mercury Blank WVV 1 ,
l 1 t
<--Total#of Containers
Sample Kit Prepared By Date/rime Relinquished By Date/Time Re'wed Be , / Dare/time
- l it{ L� T)-'-- /��/ (GIit ( 3C
Comments/Special Repomng Requirements Relinquished By Date/Time RSrved By Datehirne
Relinquished By Date/Time Received By Dale/Time
Cooler C s 8 Temps on Receipt ( Condition Upon Receipt
1 (� i-Acceptab)e -Unacceptable
Matrix OW-Groundwater SO-Soil OW-Dnnkinq Water SE-Sediment SW-Surface Water WW-Wastewater A-Air 0-Other(detail in comments) Preservation:I-Ice H-HCI N-HNO3 S-H2SO4 NO-NaOH 0-Other(detail in comments)
Note All samples suomtted to ENCO Labs are in accordance with the terms and conditions listed on me reverse of this form.unless prior written agreements exist
I

Sample Preservation Verification
ENCO Cary at)
Work Order: CC11263 Project Priority Pollutant Scan
Client TOWN OF PITTSBORO (T0009) Project#: [none]
Logged In: 10-Jul-19 13:15 Logged By Rachel Ann Yonish 22
Preservation Check Performed By: A Date/Time: 7I1 U 1I q 13f '
CC11263-01
Cont Type Pres(pH) pH Checked/ pH Adjusted Date�me Reagent Used/Comments
Requirement In Control Adjusted
B 250mLA+H2SO4 <2 Y / N / Y / N /
C 250mLA+H2SO4 <2 Y / N / A' Y / N / NA
D 250mLA+H2SO4 <2 ll/ N / NA Y /, N)/ NA
E 250mLP+H2SO4 <2 N / NA Y /8/ NA
F 250mLP+HNO3 <2 0/ N / NA Y /IN NA
G 250mLP+NaOH >12 J/ 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\PrlrlL wko_ri Ube!VdtIUI IL,rreL,n,rpt Page 1 of 1

Effluent Toxicity Report Form-Chronic Fathead Minnow Multi-Concentration Test Date 4/26/2020
Facility Town of Pittsboro WWTP NPDES#NCOO 20354 Pipe#: 001 County: Chatham
Laboratory: Resew, h&Analytical Laboratories Comments Final Effluent
Signaf��a�o ri
r I 'esponsible Charge
x
Si ur t abt t ory Supervisor RAL#80931-0,81081-01,81156-01
MAIL ORIGINAL ID: Environmental Sciences Branch
Division of Water Quality
NC DENR
1621 Mail Service Center
Raleigh,NC 27699-1621
Test Initiation Date/Time 4/15/2020 / 2:05PM Avg WVSurv.Control 0.7401 Test Organisms
Elf. Repl. 1 2 3 4 r Cultured In-House
Control Surviving# 15 15 15 15 %Survival 100.0 r Outside Supplier
Original# 15 15 15 15
Wt/original(mg) 0.7393 0 7373 0.7380 0.7460 Avg Wt(mg) 0.7401 Hatch Date 4/13/2020
45.00 Surviving# I 16 15 15 15 %Survival 100.0 Hatch Time >1600
Original# 15 15 15 15
Wt/original(mg) 0.7520 0.7307 0.7267 0.7653 Avg Wt(mg) 0.7437
67.50 Surviving# 15 15 15 15 %Survival 100.01
Original# 15 15 15 15
WVoriginal(mg) 0.7527 0.7433 0.7140 0.7453 Avg Wt(mg) 0.7388
90.00 Surviving# 15 15 15 15 %Survival 100 0
Original# 15 15 15 15
Wt/original(mg) 0 7567 0.7193 0.6693 0.6827 Avg Wt(mg) 0.7070
95.00 Surviving# 15 15 15 15 %Survival 100.0
Original# 15 15 15 15
WVoriginal(mg) 0 7160 0.7440 0.7520 0.6987 Avg Wt(mg) 0.7277
100 00 Surviving# 15 14 15 14 %Survival 96.7
Original# 15 15 15 15
Wt/original(mg) 0.7400 0,7164 0.7080 0.7557 Avg Wt(mg) 0 7300
Water Quality Data Day
Control 0 1 2 3 4 5 6
pH(SU)Init/Fin 7.07 / 7.10 7.17 / 7.08 7.14 / 7.04 7.19 / 7.10 7.22 / 7.20 7.17 / 7.08 7 11 / 7.07
DO(mg/L) Init/Fin 8.6 / 8 3 8 6 / 8.3 8.5 / 8.2 8.6 / 8.3 8.6 / 8 4 8.5 / 8.2 8.6 / 8.3
Temp(C)InitFin 24.6 / 24.4 24.5 / 24 7 24.6 / 24 5 24.5 / 24.7 24.6 / 24 5 24.5 / 24.6 24.6 / 24.5
High Concentration 0 1 2 3 4 5 6
pH(SU)!nit/Fin 6.23 / 6.44 6.48 / 6.47 6 94 / 6.90 6.99 / 6.88 6.95 / 6.85 6.83 / 6 85 6.99 / 6.84
DO(mg/L)Int/Fin 8.5 / 8.3 8.5 / 8.2 8.4 / 8.1 8.5 / 8.1 8.4 / 8.2 8.4 / 8.1 8.6 / 8.3
Temp(C)'nit/Fin 24.7 r 24.6 24.5 / 24.5 24.6 / 24.7 24.7 / 24.6 24.6 / 24.6'24.5 / 24 5 24 5 / 24 6
Sample 1 2 3 Survival Growth Overall Result
Collection Start Date 4/13/2020 4/16/2020 4/19/2020 Normal rl Fl ChV >100%
Grab Horn.Var ri Fl
Composite(Duration) 24 24 24 NOEC 100.00 100.00
Hardness(mg/L) 68 75 63 LOEC >100% >100%
Alkalinity(mg/L) 32 42 36 ChV >100% >100%
Conductivity(umhos/cm) 563 527 554 Method Steels Dunnetts
Chlorine(mg/L) 0.03 0.02 0.01
Temp at Receipt(°C) 2.0 2.8 3.0 Stats Survival Growth
Conc. Critical Calculated Critical Calculated
Dilution H2O 45.00 10 18 2.41 -0.2136
Hardness(mg/L) 98 67.50 10 20 2.41 0.0808
Alkalinity(mg/L) 61 90.00 10 14 2.41 2.0083
Conductivity(umhos/cm) 403 95.00 10 17 2.41 0.7558
100.00 10 17 2.41 0.6134
DWQ Form AT-5(1/04)