WQ0038008_Application (FTSE)_20200806

State of North Carolina
DWR
Department of Environmental Quality
Division of Water Resources
1 SA NCAC 02T .0300 — FAST TRACK SEWER SYSTEM EXTENSION APPLICATION
Division aF Water Resources FTA 04-16 & SUPPORTING DOCUMENTATION
Application Number: he u)mplctcd b% DWR)
All items must be com leted or the application will be returned
1. APPLICANT INFORt41ATION:
1. Applicant's name: City of Durham (company, municipalit). I iOA, utilit%, etc.)
2. Applicant type. ❑ Individual ❑ Corporation ❑ General Partnership ❑ Privately -Owned Public Utility
❑ Federal ❑ Stat&County ® Municipal ❑ Other
3. Signature authority's name: Donald F. Greeley, PE. PLS per 15A NCAC 02"1" .0106(h)
Titic: Director of the Department of Water Management
4. Applicant's mailing address: 101 City Hall Plaza
City: Durham State: NC Zip: 27701-
5. Applicant's contact information:
Phone number: [phone] Email Address: Don,Greelc% lei durhamne.gov
IL PROJECT INFORMATION:
1. Project name: Snow Hill Road Pumf Station
2. Application. Project status: ❑ New Proposed Permit p ( ) ®Existing Permit/Project
If a modification, provide the existing permit number: WQ0038008 and issued date: 9!If2015
If new construction but part of master plan, provide the existing permit number: WQ00
3. County where project is located: Durham
4. Approximate Coordinates (Decimal Degrees): Latitude: 36.09592' Longitude:-75.865041
5. Parcel ID (ifapplicable): 183399
(or Parcel iD to closest downstream sewer)
Ill. CONSULTANT INFORMATION:
1. Professional Engineer: Brian Porter, PE License Number: 033116
Firm: Hazen and Saul,cr
Mailing address: 4011 Westchase Blvd, Stc 300
City: Ralcieh State: NC Zip: 27607-3949
Phone number: [phone] Email Address: h nerdhazenandsawyer.com
IV. WASTEWATER TREATMENT FACILITY (WWTF) INFORMATION:
1. Facility Name: North Durham Water Reclamation Facility Permit Number: NCO023841
Owner Name: City of Durham
V. RECEIVING DOWNSTREAM SEWER INFORMATION (if different than WWTF):
I. Penn it Number(s): WQCS00005 Downstream (Receiving) Sewer Size: 21 inch
Svstem Wide Collection System Permit Numher s ifa licablc : WQCS
Owner Namc(s): Citv of Durham
FORM: FTA 04-16 Page I of5

VT. GENERAL REQUIREMENTS
1. If the Applicant is a Privately -Owned Public Utility, has a Certificate of Public Convenience and Necessity been attached?
[:]Yes [-]No ®N/A
2. If the Applicant is a Developer of lots to be sold, has a Developer's Operational Agreement (FORM: DEV) been attached?
❑ Yes []No ®N/A
3. If the Applicant is a Ham a e Owners' Association has an Operational Agreement (FORM, H A been attached?
❑ Yes ❑No ®NIA
4. Origin of wastewater: (check all that apply):
® Residential Owned ® Retail (stores, centers, malls) ❑ Car Wash
® Residential Leased ® Retail with food preparation/service ❑ Hotel and/or Motels
® School / preschool / day care ® Medical / dental / veterinary facilities ❑ Swimming Pool /Clubhouse
® Food and drink facilities ® Church ❑ Swimming Pool/Filter Backwash
® Businesses / offices / factories ❑ Nursing Home ❑ Other (Explain in Attachment)
5. Nature of wastewater: 331% Domestic/Commercial % Commercial
�2 % Industrial See 15A N .A .02T.0 ] i 2
1 4-Is there a Pretreatment Program in effect? ® Yes ❑ No
6. Hasa flow reduction been approved under 15A NCAC Q2T .01141fl? ❑ Yes ® No
➢ If yes, provide a copy of flow reduction approval letter
7. Summarize wastewater generated by project:
Establishment Type (see 021.0114(G)
Daily Design Flow
No. of Units
Flow
gal/
GPD
gal/
GPD
gal/
GPD
gal/
GPD
gal/
GPD
gal/
GPD
Total
GPD
a See 15 A NCAC 2T .0 114 d e 1 and e 2 for caveats to wastewater design flow rates (i.e., minimum flow per
dwelling; proposed unknown non-residential development uses; public access facilities located near high public use areas;
and residential property located south or east of the Atlantic Intracoastal Waterway to be used as vacation rentals as defined
in G.S. 42A-4).
b Per 15A NCAC 02T .0114(c), design flow rates for establishments not identified [in table 15A NCAC 02T.01141 shall be
determined using available flow data, water using fixtures, occupancy or operation patterns, and other measured data.
8. Wastewater generated by project: Q GPD (per I �A NCAC 02T .0114)
Do not include future flows or previously permitted allocations
If permitted flow is zero, indicate why:
® Pump Station or Gravity Sewer where flow will be permitted in subsequent permits that connect to this line
❑ Flow has already been allocated in Permit Number:
❑ RehabiIitation or replacement of existing sewer with no new flow expected
❑ Other (Explain):
FORM: FTA 04-16 Page 2 of 5

Vil. GRAVITY SEWER DESIGN CRITERIA (If Applicable) - 02T .0305 & 1IDC (Gravity Sewers):
1, Summarize gravity sewer to be permitted:
Size (inches)
Length (feet)
Material
30
20
DIPIFRP
24
465
DIP/FRP
8
33
DIP/FRP
Section it & III of the MDC for Permitting of Gravity Sewers contains information related to design criteria
Section III contains information related to minimum slopes for gravity sewer(s)
Oversizing lines to meet minimum slope requirement is not allowed and a violation of the AIDC
Vill. PUMP STATION DESIGN CRITERIA (If Applicable)-02T.03G5 & MDC (Pump Stations/horce NI:tins):
COMPLETE FOR EACH PUMP STATION INCLUDED IN THIS PROJECT
I. Pump station number or name: Snow HilI Road Pump Station ;Treyburn #4 PS is
2. Approximate Coordinates (Decimal Degrees): Latitude: 36.09592-` Longitude: -Z%, 6504 not being modified
3. Design (low ofthe pump station: 8.60 millions gallons per day (firm capacity.) as part of this
4. Operational point(s) of the pump(s): 2920 gallons per minute at 173 sect total d}namic head (1 D1 l) project
5. Summarize the force main to be permitted (for this Pump Station):
Size (inches)
Length (feet)
Material
20
11,600
DIP/FRP
24
3.050
I I D P E;
6. Power reliability in accordance with 15A-NCAC 021 ,0305(h)( l ):
**2H111 LO pump
arrangement,
please see
attached letter
describing pump
operation.
® Standby power source or pump with automatic activation and telemetr) - 15A NCAC 02T .0305(hx I )ft3
Required for all pump stations with an average daily flow greater than or equal to 15,000 gallons per day
Must be permanent to facility
Or ifthe pump station has an average daily flow less than 15.000 gallons per day:
❑ Portable power source with manual activation, quick -connection receptacle and telemetry - 15A NCAC 027'
.0305(h)(1)(C)
or
❑ Portable pumping unit with plugged emergency pump connection and telemetry - 15A NCAC 02T .0305(h)(1)(C):
It shall be demonstrated to the Division that the portable source is owned or contracted by the applicant (draft agreement)
and is compatible with the station.
f the portable power source or pump is dedicated to multiple pump stations, an c%aluation of all the pump stations' storage
capacities and the rotation schedule of the portable power source or pump. including trat el timeframes. shall be provided
in the case of a multiple station power outage.
FORM: FTA 04-16 page 3 0175

IX. SETBACKS & SEPARATIONS — (02B .0200 & 15A NCAC 02T .0305(f)):
1. Does the project comply with all separations found in 1 A NCAC 02T 0
® Yes ❑ No
➢ 15A NCAC 02T.0305(g), contains alternatives where separations in 02T.0305(fl cannot be achieved.
D "Stream classifications can be identified using the Division's NC Surface Water Classifications web a e
➢ If noncompliance with 2T 0 or see Section X of this application
2. Does the project comply with separation requirements for wetlands? (50 feet of separation) ❑ Yes ® No ❑ N/A
See the Division's draft separation requirements for situations where separation cannot be meet
D No variance is required if the alternative design criteria specified is utilized in design and construction
➢ As built documents should reference the location of areas effected
3. Does the project comply with setbacks found in the river basin rules per 15A NCAC 02B .02002 ® Yes ❑ No ❑ N/A
D This would include Trout Buffered Streams per 15A NCAC 2B.0202
4. Does the project require coverage/authorization under a 404 Nationwide or ® Yes []No
individual permits or 401 Water Quality Certifications?
D Information can be obtained from the 401 & Buffer Permittine Branch
5. Does project comply with 15A NCAC 2T, l c (additional permits/certifications)? ® Yes ❑ No
Per 1SA NCAC 02T.0105(c)(6), directly related environmental permits or certification applications are being prepared, have
been applied for, or have been obtained. Issuance of this permit is contingent on issuance of dependent permits (erosion and
sedimentation control plans, stormwater management plans, etc.).
6. Does this project include any sewer collection lines that are deemed "high -priority?"
Per I A NCAC 2T 2, "high -priority sewer" means "any aerial sewer, sewer contacting surface waters, siphon, or sewer
positioned parallel to streambanks that is subject to erosion that undermines or deteriorates the sewer.
[:]Yes ® No ❑ N/A
D If yes, include an attachment with details for each line, including type (aerial line, size, material, and location).
High priority lines shall be inspected by the permittee or its representative at least once every six -months and inspections
documented per 15A NCAC 02T,0403(a)(5) or the permitee's individual System -Wide Collection permit.
FORM: FTA 04-16 Pive 4 of 5

X. CERTIFICATIONS:
1. Does the submitted system comply with 15A NCAC 02T, the Minimum Desi !n Criteria for the Permitting Qf Pump Stations
and Force Mains latest version and the Gravity Sewer. Minimum Desia=_n C:rileria (latest version) as applicable?
® Yes ❑ No
If No, complete and submit the Variance: Alternative Design Request application (VADC 10-14) and supporting documents for
review. Approval of the reguest is reattired prior to submittal of the Fast Track -Application and supporting documents.
2. Professional Engineer's Certification:
11_ eir t_kh -A eollcv, _ w _ attest that this application for
(Professional Engineer's name from Application Item III.1.)
has been reviewed by me and is accurate, complete and consistent with the information supplied in the plans, specifications,
engineering calculations, and all other supporting documentation to the best of my knowledge. I further attest that to the best
of my knowledge the proposed design has been prepared in accordance with the applicable regulations, Gravity Sewer
Minimum Design Criteria for Gravity Sewers (latest version), and the Minimum Design Criteria for the Fast -Track Permitting
of Pump Stations and Force Mains (latest version). Although other professionals may have developed certain portions of this
submittal package, inclusion of these materials under my signature and seal signifies that I have reviewed this material and
have judged it to be consistent with the proposed design.
NOTE - In accordance with General Statutes 143-215.6A and 143-215.613, any person who knowingly makes any false
statement, representation, or certification in any application package shall be guilty of a Class 2 misdemeanor, which may
include a fine not to exceed $10,000, as well as civil penalties up to $25,000 per violation.
North Carolina Professional Engineer's seal, signature, and date:
Applicant's Certification per I5A NCAC 02T .0106(b):
I,
(Signature Authority's name &
: r-- C o
from Application Item 1.3.)
2 Q%0 4,�Q��
3 sto ��3/Za6 i
4
�yq�uuauiu��'
attest that this application for
has been reviewed by me and is accurate and complete to the best of my knowledge. I understand that if all required parts of
this application are not completed and that if all required supporting documentation and attachments are not included, this
application package is subject to being returned as incomplete. I understand that any discharge of wastewater from this non -
discharge system to surface waters or the land will result in an immediate enforcement action that may include civil penalties,
injunctive relief, and/or criminal prosecution. I will make no claim against the Division of Water Resources should a condition
of this permit be violated. I also understand that if all required parts of this application package are not completed and that if
all required supporting information and attachments are not included, this application package will be returned to me as
incomplete.
NOTE - In accordance with General Statutes 143-215.6A and 143-215.6B, any person who knowingly makes any false
statement, representation, or certification in any application package shall be guilty of a Class 2 misdemeanor, which may
include a fine not to exceed $10,000 as well as civil penalties up to $25,000 per violation.
l
Signature:..-- — _ �� Date:
FORM: FTA 04-16 Page 5 of 5

azen Hewn and Sawyer
498 Seventh Avenue 11th Floor
HNew York, NY 10018 •212 539.7000 C Dept of Environmental Quality
August 6, 2020
Ted Cashion
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Water Quality Regional Operations Section
512 N. Salisbury St., Suite 925
Raleigh, North Carolina 27604
Re: Snow Hill Road Pump Station
Dear Mr. Cashion:
AUG - B 2020
Raleigli Regional pfl•!ce
Hazen and Sawyer is pleased to submit two (2) copies of the Pump Station application
package to request issuance of a Sewer Permit for the Snow Hill Road Pump Station
(SHRPS) and the associated gravity sewer and force main for the City of Durham.
Pomect Descriation
Snow Hill Road Pump Station (SHRPS) is an existing wet-pit/dry-pit sewer pump station
facility owned and operated by the City of Durham (City). SHRPS is located within City
limits east of Snow Hill Road approximately 900 feet south of Toredge Road. SHRPS
receives gravity flows from several schools and residential customers, and pumped flows
from Treyburn Pump Station (Treyburn) #2, which serves the industrial area located east
of SHRPS. SHRPS pumps to a shared force main with Treyburn #3 and #4 with a
discharge at the Eno Pump Station (EPS) from which flow is repumped to the North
Durham Water Reclamation Facility (NDWRF). The SHRPS is currently a limiting factor in
accommodating industrial growth and increased flows from Treyburn #2, because its
capacity is less than Treyburn #2.
The purpose of this project is to replace the existing SHRPS with a new pump station and
force main to increase near -term and future -term SHRPS capacity. The new SHRPS will
be located outside of the flood plain, unlike the existing pump station.
Since the SHRPS will only replace the existing pump station and not generate any new
development, no additional flow will be introduced to the system. Additional flow will be
requested as needed in the future as developments increase in the service area
EncroachmentslPermits
Encroachments and permits in progress include the following:
• Sedimentation and Erosion Control
• NCDOT Driveway Permit
• NCDOT Encroachment Permit
hazenandsawyer.com

lugust G, 2020
• City of Durham Site Plan Permit
Items Included in Application Package
The following list all the items included with this application package:
1) Check for $480
Two Copies of each of the following:
2) Cover Letter
3) USGS Site Map
4) Fast track Sewer System Extension Application
5) Flow Tracking/Acceptance Form
If you have any questions regarding this submittal, please don't hesitate to contact me at
919-755-8654 or fmatarOhazenandsawver.com.
Best Regards,
Faris Matar, P.E.
Principal Engineer
Hazen and Sawyer
Cc: Lisa Mitchell, P.E., City of Durham
Brian Y. Porter, P.E., Hazen and Sawyer

I M WATER MANAGEMENT
CITY 4R DURHAM
October 5, 2020
Mr. Jason Robinson
NC DEQ— Raleigh Regional Office
3800 Barrett Drive
Raleigh, NC 27609
Subject: Snow Hill Rd PS - Sewer Extension Application/Eno Lift Station Capacity
Dear Mr. Robinson;
In response to your September 9, 2020 email to Hazen & Sawyer and myself, please find a revised Flow Tracking
for Sewer Extension Applications (FTSE 10-18) form- This updated form reflects current conditions resulting
from construction of the new Eno interceptor and lift station improvements, as well as addresses your question
regarding available capacity at the Eno Lift Station.
The FTSE form submitted with the City's initial permit application utilized a peaking factor of 6.0. The peaking
factor was taken from an assessment of an upstream outfall performed in 2017. Since the 2017 assessment, the
City of Durham Department of water Management (DWM) have performed the following:
Lined approximately 125,000 linear feet (LF) of gravity sewer, rehabilitated 155 manholes, and raised 8
manholes in the Eno Basin.
Earmarked another 140 manholes for rehabilitation in the Eno basin in our recently -started 2020
Manhole Rehabilitation contract. These are anticipated to be completed over the next 9 months.
Completed construction of approximately 8,800 LF of 48- and 36-inch interceptor main upstream of the
Eno Lift Station. This replacement, permitted as WQ0005513 Modification, incorporated several inflow
and infiltration reduction measures (elevated manhole rims, locking manhole rims and a revised
alignment that is less prone to flooding).
Since the new interceptor became fully in service around July 1, 2020, flow monitoring on the new outfall shows
a peaking -factor reduction to approximately 5 based on flow data to date. Flow monitoring data is attached.
Using the updated peaking factor, a net sewer flow availability at the Eno Lift Station is 131,000 gpd. Section 1.f
of the form has also been updated to reflect the City's request to al ocate this volume of new average daily flow
to the proposed Snow Hill Lift Station project.
Additionally, the new Snow Hill Lift Station will re -pump flow from the City's existing Treyburn 3 and Treyburn 4
lift stations. They currently Share a force main and discharge directly to the Eno Lift Station. This flow
contributes to the average daily flow documented in column B of the FTSE form. The proposed firm capacity of
the Snow Hill Lift Station includes the re -pumping of these existing flows; however, no change to the existing
average daily flow at the Eno Lift Station will take place as a result of this revised pumping configuration.
The City is currently under contract with an engineering firm to evaluate the Eno Lift Station's existing capacity,
1600 Mist Lake 0r Durham, NC 27704 919.560.4381 DurhamNC gov j Follow Us @Co(Durham
!a

buildout capacity, and interim and buildout lift station upgrades. The project is fully funded in the City's Capital
Improvement Program (CIP). In addition, the City Currently has active projects to identify and eliminate inf'ow
and infiltration in the gravity sewer basin that drains to the Eno Lift Station.
If you have any additional questions, comments or concerns please contact Jerry Nlorrone at [phone], ext
35243 or [e-mail]; or Bryant Green at [phone], ext 35268 or
[e-mail].
Sincerely,
Donald F. Greeley, PE, PLS
Director
Department of Water Management
Cc: Jerry F. Morrone, PE
Bryant Green, PE
Brian Porter, PE (Hazen & Sawyer)
1600 Mist Lake Dr. Durham, NC 27704 919.560.4331 DurhamPlc,gov Follow Us @CityofDurharnNC
00

State of North Carolina
Department of Environmental Quality
Division of NVater• Resources
Flow Tracking for Sewer Extension Applications
(FTSE 10-I8)
Entity Requesting Allocation: City of Durham
Project Name for which flog is being requested: Snow Hill Road Pump Station
llfore thrrrr one FTSi"• n►({v be reyrrired for a sin;;le project if the o►vue►• of the 1017'P is nor responsible for rill ptuup
stations olunl,* they rattle of the proposer! ►ruste►water flo►r.
I. Complete this section only if you are the owner of the wastewater treatment plant.
a. WWTP Facility Name: North Durham Water Reclamation Facility
b. WWTP Facility Pen -nit #: NC 0023341
c. WWTP facility's permitted flow
d. Estimated obligated flow not yet tributary to the WWTP
e. WWTP facility's actual avg. flow
f. Total flow for this specific request
g. Total actual and obligated flows to the facility
h. Percent of perirtitted flow used
AR flnrvs rn•e in NIGD
20
4.82
9.93
6.83
14.75
73.S
1I. Complete this section for each pump station you are responsible fir along the mute of this proposed
wastewater flow.
List ptunp stations located between the project connection point and the WWTP:
Pump
Punip
Station
Station
(Name or
Pe:nnit
Nuutber)
No.
(A)
Desmn
Average
Daily
Firn, no,-,
Capacity, * (Firm p0_
NIGD -%IGD
Eno PS WQ0005513 24.33 4.866
(11)
Appmc
Current
Avg. Daily
Flow,
MCID
4.247
(C)
(D)=(BBC)
(1:)=(A-D)
Obligated,
Not Yet
Total Current
Tributary
now Plu-,
Daily Flow.
Obligated
Available
MGD
Flow
Capacity"**
0,48802
4,735
0.131
* rrbe Firm Capacity (design flow) of any pump station is defined its the maximum pumped flo►r•
that can be nchieved %%-itb the largest pump taken out of service.
** Design Average Daily Flow is the firm capacity of the pump station divided by a peaking factor
(pf) not less than 2.5, per Section 2.02(A)(4)(c) of the Minimum Design Criteria.
*"* A Planning Assessment Addendum shall be attached for each pump station located
between the project connection point and the WNN'rP where the Available Capacity is < 1).
Downstream Facility Larne (Sewer): North Durham WRF
Downstream Permit number: NCO023841
Page I of h
F'fSE 10-H

Ill_ Certification Statement:
_ZI - �_xO .✓ ccrtifv to the best of ulv knowlecft:e that the addition of
the volume of wastewater to be permitted in this project has been evaluated along the route to the receiving
wastewater treatment facility and that the flow from this protect is not anticipated to cause any capacity
related sanitary sewer overflows or overburden any downstream pump station en route to the receiving
treatment plant under nonnal circumstances, given the implementation of the planned improvements
identified in the planning assessment where applicable. This analysis has been performed in accordance
with local established policies and procedures using the best available data. This certification applies to
those items listed above in Sections I and 11 plus all attached planning assessment addendums for which I
am the responsible party. Signature of this form certifies that the receiving collection system or treatment
works has adequate capacity to transport and treat the proposed new wastewater.
Signing Df cial Signalrire Date
Till.? of .Sigrtirrg Officii7l
Page 2 of 6
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Robinson, Jason
From: Porter, Brian <[e-mail]>
Sent: Tuesday, August 18, 2020 7:04 PM
To: Robinson, Jason; [e-mail]
Cc: Cashion, Ted; Matar, Faris
Subject: (External] RE: Snow Hill Rd PS - Sewer Extension Application
Attachments: Pages from FTA 04-16 (Update) (1)-new.pdf, Project_Description.pdf
ntto
• E*t#mal emall. Do notclIck. links or open attachments unless you- verify: Send'all suspicious email as an attaalnneW�
s �. ov
Jason,
Please see the attached revised pages 1 and 3 of the permit application. These were modified to reference the existing
Show Hill Road Pump Station Permit WQ0038OO8. Also attached is a revised summary letter that describes the work
being performed as part of the permit modification. Please let me know if you need anything more or would like to
discuss further. Thanks.
Brian
Brian Y. Porter, PE
Senior Associate I Hazen and Sawyer
4011 WestChase Blvd, Suite 500, Raleigh, NC 27607
919-863-1011 (direct) 1 540 250-1978 (cell)
boortefShazenand sawyer.com 1 hazenandsawyer.com
From: Robinson, Jason <[e-mail]>
Sent: Thursday, August 6, 2020 4:14 PM
To: Porter, Brian <[e-mail]>; [e-mail]
Cc: Cashion, Ted <[e-mail]>
Subject: Snow Hill Rd PS - Sewer Extension Application
External Email - think before you click
Mr. Greeley and Mr. Porter,
We received the application for the referenced sewer extension.
A permit has already been issued for the Snow Hill Rd. PS (WQ0038OO8, attached). We think because of this, this new
application should be a request for a modification to WQ0038OO8, instead of a request for a new permit.
The modification application should include everything that was in the original permit that will stay in operation, it
should not include anything that was in the original permit that will be taken out of service, and include any additional
lines that will be installed as part of the new construction. The new permit that is issued will completely replace the old
permit.
Let me know if you have any questions.
-Jason

Jason T. Robinson, P.E.
Raleigh Regional Office
Water Quality Regional Operations
SIC Division of Water Resources, DEQ
919-791-4200
"Subscribe to Collection System & Sewer Permitting Updates—
E-mail correspondence to and from this address may be subject to the North Carolina Publrc Records Law and may be disclosed to
third parties,
Based on the current guidance to minimize the spread of COVID-19, the Department of Environmental Quality has
adjusted operations to protect the health and safety of the staff and public. Many employees are working remotely or
are on staggered shifts. To accommodate these staffing changes, all DEQ office locations are limiting public access to
appointments only. Please check with the appropriate staff before visiting our offices, as we may be able to handle your
requests by phone or email. We appreciate your patience as we continue to serve the public during this challenging
time.

Robinson, Jason
From: Robinson, Jason
Sent: Tuesday, September 15, 2020 1:14 PM
To: Porter, Brian; [e-mail]
Cc: Cashion, Ted; Matar, Faris; Fertenbaugh, Christyn L; Lisa Mitchell
Subject: RE: [External) RE: RE: RE: Snow Mill Rd PS - Sewer Extension Application
Attachments: WQ0019263-Treybun PS B.pdf
Brian,
FYI... In regards in trying to determining what permit covered the existing forcemain from Snow Mill that will potentially
be upgraded as part of the Snow PS upgrades, I was able to find one of the old permits you referenced. I have attached
it. It's WQ0019263, Treyburn Pump Station B issued February 2001. 1 have attached it, and included a snippet of what it
covers:
In accordance with the provisions of article 21 of Chapter 143, General Statutes of t
amended, and other applicable Laws, Rules, and Regulations, permission is hereby granted to C
the construction and operation of a 1,540—gallon per minute pump station wills duplex pumps, o
visual high grater alarms, telemetry, and automatically -activated stand-by generator with autom
as approximately 4,750 linear feet of I2-inch force main and 1,322 linear feet of Winch force
part of the TreyburnPump Station B project, which replaces the previously permitted temporar
Permit No. 14217 issued January 20, 1987, with no additional discharge of collected industria
the City of i)urhnm'c exictino ,zPwrrwe avctnm rmrcnint to the annlicarinn received October
As far as the other one you referenced, I think you're right in that it is not a State issued permit (#15806).
------------
Jason T. Robinson, P.E.
Raleigh Regional Office
Water Quality Regional Operations
NC Division of Water Resources, DEQ
919-791-4200
"Subscribe to Collection System & Sewer Permitting Updates"
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to
third parties.
Based on the current guidance to minimize the spread of COVID-19, the Department of Environmental Quality has
adjusted operations to protect the health and safety of the staff and public. Many employees are working remotely or
are on staggered shifts. To accommodate these staffing changes, all DEQ office locations are limiting public access to
appointments only. Please check with the appropriate staff before visiting our offices, as we may be able to handle your
requests by phone or email. We appreciate your patience as we continue to serve the public during this challenging
time.
From: Porter, Brian(mailto:[e-mail])
Sent: Friday, September 11, 202012:50 PM
To: Robinson, Jason <[e-mail]>; [e-mail]
Cc: Cashion, Ted <[e-mail]>; Matar, Faris <[e-mail]>; Fertenbaugh, Christyn L

<[e-mail]>; Lisa Mitchell <Lisa.Mitchell @durhamnc.gov>
Subject: [External] RE: RE: RE: Snow Hill Rd PS - Sewer Extension Application
*, External email: Do not flick links or open attachments unless you verify, Send all suspicious email as an attach mentto
[r�J�rt-s;aam �nc:r_ov
Jason,
Regarding question 4 below, per the Planning Addendum, the upgrades to Eno Pump Station are scheduled to be
completed by July of 2025. Please let me know if you need any additional information regarding this. Thanks.
Brian
Brian Y. Porter, PE
Senior Associate I Hazen and Sawyer
4011 WestChase Blvd, Suite 500, Raleigh, NC 27607
919-863-1011 (direct) 1 540 250-1978 (cell)
[e-mail] I hazenandsawyer.com
From: Robinson, Jason <[e-mail]>
Sent: Tuesday, September 1, 2020 5:06 PM
To: Porter, Brian <b orter hazenandsaw er.com>; [e-mail]
Cc: Cashion, Ted <ted.cashion@ncdenr,gov>; Matar, Faris <[e-mail]>;
[e-mail]: Fertenbaugh, Christyn L <christyn.fertenbaueh(cDncdenr.eov>
Subject: RE: RE: RE: Snow Hill Rd PS - Sewer Extension Application
HI Brian & Done,
1. We'll need to know the classifications of the wetlands, or if they abut certain classified waters.. Specifically,
we'll need to know if the following separation requirements are met:
Waters classified WS-li. ws-III. WS-IN'. $. SA. 011W. LIQW. or SI1 front normal high water or tutr
CteCation, %%etlauds that are dueCllc a1)011ut21l1VSe L%11Cr5, a11d wetlands Ciilssltied its i.-\CI- or SWI.
0 feet
Alt%' other stream, lake. uupoulldtttent. weilauds classified a; NVL.. milers classified as c SC, or «S. \-. or
ground waler lowering aid surface drainage ditches 10 feet
If these separation requirements are not met, a variance may be needed.
2. Can you please send me a copy plans so we can see the areas of project that encroach on wetlands?
3. We still need to know if the 9,500 of 12" force main that will be abandoned was included in another permit.
4. One thing I missed during our first review was the Flow Tracking Sheet (FTSE) that states that the downstream
Eno PS is (or will be, I'm not sure) 680,000 gallons over capacity (Item II of the FTSE). The addendum states the
design project for expansion of the Eno Lift Station are currently underway. We (DWR RRO) has recently
received an application to upgrade the Eno PS Force main, but to my knowledge, we haven't received an
application to upgrade the actual Eno River Pump Station. Please explain. Will an application to upgrade the
Eno River PS be submitted soon? When will the upgrades to the Eno River PS be expected to be certified and
ready for operation?
Item Lf of the Flow Tracking Sheet (FTSE) states that the flow for this specific request is 6.83 MGD. Is that the
additional flow that will be going to the new Snow Hill PS?
------------
Jason T. Robinson, P.E.
Raleigh Regional Office

Water Quality Regional Operations
NC Division of Water Resources, DEQ
919-791-4200
"Subscribe to Collection System & Sewer Permitting Updates"
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to
third parties.
Based on the current guidance to minimize the spread of COVID-19, the Department of Environmental Quality has
adjusted operations to protect the health and safety of the staff and public. Many employees are working remotely or
are on staggered shifts. To accommodate these staffing changes, all DEQ office locations are limiting public access to
appointments only. Please check with the appropriate staff before visiting our offices, as we may be able to handle your
requests by phone or email. We appreciate your patience as we continue to serve the public during this challenging
time.
From: Porter, Brian[mailto:[e-mail]]
Sent: Friday, August 28, 2020 7:30 AM
To: Robinson, Jason <[e-mail]>; [e-mail]
Cc: Cashion, Ted <[e-mail]>; Matar, Faris <[e-mail]>;
Jim.Hardine@_durhamnc.eov
Subject: [External] RE: RE: Snow Hill Rd PS - Sewer Extension Application
+ EyWrnal email,;po not blii;ic`linlis or open attachinents unless you verify. $enti all -suspicious email.as aniattaohmen-t td
e o.�76arrr nc; ov
Jason,
Please see my responses to your questions in red below. We are in the process of determining the permit information
for the existing force main and Treyburn #2 and #3. 1 will provide that information as soon as 1 get it. Please let me know
if I need to provide further clarification for any of my responses. Thanks.
Brian
Brian Y. Porter, PE
Senior Associate I Hazen and Sawyer
4011 WestChase Blvd, Suite 500, Raleigh, NC 27607
919-863-1011 (direct) 1 540 250-1978 (cell)
bAorter(cDhazenandsawyer.com I hazenandsawyer com
From: Robinson, Jason <[e-mail]>
Sent: Thursday, August 27, 202012:39 PM
To: Porter, Brian <bporterjRhaze nandsawyer.com>; don. rg [e-mail]
Cc: Cashion, Ted <[e-mail]>; Matar, Faris <fmatar hazenandsawyer.com>;
[e-mail]
Subject: RE: RE: Snow Hill Rd PS - Sewer Extension Application
Brian and Don,
I'm following -up on the email I sent last Friday (below) with questions regarding the Snow Hill Rd PS permit modification
application. It's our understanding that this may be a time -sensitive project, so we wanted to make sure we kept the
review moving, particularly because it seems like it might require modifications to more than one existing permit.
Thanks,

Jason
------------
Jason T. Robinson, P.E.
Raleigh Regional Office
Water Quality Regional Operations
NC Division of Water Resources, DEQ
919-791-4200
*"Subscribe to Collection System & Sewer Permitting Updates**
E-mail correspondence to and from this address may be subject to the North Carolina Public Records taw and may be disclosed to
third parties.
Based on the current guidance to minimize the spread of COVID-19, the Department of Environmental Quality has
adjusted operations to protect the health and safety of the staff and public. Many employees are working remotely or
are on staggered shifts. To accommodate these staffing changes, all DEQ office locations are limiting public access to
appointments only. Please check with the appropriate staff before visiting our offices, as we may be able to handle your
requests by phone or email. We appreciate your patience as we continue to serve the public during this challenging
time.
From: Robinson, Jason
Sent: Friday, August 21, 20201:05 PM
To: 'Porter, Brian' <bporter@haze nandsawyer.com>; [e-mail]
Cc: Cashion, Ted <ted.cash ion @ncdenr.eov>; Matar, Faris <fma tar@ haze nandsaw er.com>
Subject: RE: RE: Snow Hill Rd PS - Sewer Extension Application
Brian and Don,
Brian, thanks for revising the application to reflect that this a request to modify the existing Snow Hill PS sewer
extension permit. After a more comprehensive review of the application, we have a few more questions:
The original Snow Hill Pump Station sewer extension permit (WQ0038008) only included two pump stations. It
did NOT include any sewer lines (gravity nor forcemain). The modification application we're reviewing includes
—350 LF of gravity line and 14,450 LF of gravity line.
a) Is all of the lines listed in the new application upgrades to existing lines? And/or will existing lines be
abandoned with the installation of new lines?
9500 linear feet of 12-inch force main will be abandoned in place following the construction of the 20-inch force main.
The existing force main discharge into a gravity sewer upstream of Eno Pump Station. This sewer is not adequately sized
for the additional flow, so the new force main will continue to Eno Pump Station. This is why the abandoned force main
is approximately 5,000 linear feet shorter than the new force main. 10 linear feet of existing 12-inch gravity sewer will
also be abandoned. This is the short section of sewer that enters the existing Snow Hill Road PS.
b) Do you know what sewer extension permit(s) cover(s) those lines (since they weren't included in the
original Snow Hill PS permit)?
I do not know which permit covers the existing force main. We are looking into that along with the permits for Treyburn
#2 and Treyburn #3.
2. Item IX.2 on the application is checked "No" for meeting wetland separation requirements. Please explain.
The project area and immediately surrounding lands were assessed for the presence and extent of jurisdictional
wetlands. Three wetlands were identified within or in proximity to the proposed project footprint. Wetland WA is
located on the pump station property and cannot be avoided due to its landscape position and the limited space

available between the existing fill slope associated with the Durham Tech parking lot and the upgradient limit of the
100-year floodplain. Wetland WA has been determined to not fall under the U.S. Army Corps of Engineers jurisdiction
and is therefore subject to regulation only under Section 401 of the Clean Water Act.
Wetland WB is located approximately 9 feet outside the proposed new easement along the force main alignment. The
force main cannot be shifted further away from the wetland edge due to its proximity to Snow Hill Road. The force main
alignment is set to parallel the roadway in the vicinity of wetland WB. Shifting the alignment to the west in an attempt
to avoid wetland impacts would require a significant increase in pipe length, and it may not be feasible to avoid wetland
impacts as has been done with the current alignment. Shifting the alignment to the east would require moving the line
to the other side of the roadway. A shift east is not feasible due the existing utilities that parallel the east side of Snow
Hill Road, with a gas line being of particular concern.
Wetland WC is located adjacent to the existing force main easement. The proposed force main alignment is situated
approximately 27 feet from the wetland boundary. The proposed alignment is situated as close to the existing force
main as is allowable. Shifting the existing alignment further from the wetland would require that the proposed force
main cross the existing force main and would result in impacts to a nearby stream beyond the limits of the existing
permanent stream impacts associated with the existing force main corridor.
Impacts to wetland WA are unavoidable due to site constraints. Impacts to wetlands WB and WC have been avoided in
the project design. The contractor will be restricted from work, disturbance, or other use of lands outside the utility
easement in order to prevent encroachment into, fill over, or other disturbance of wetlands WB and WC.
3. Item IX.6 is checked "no" for any high priority lines. Since this application includes almost 6 miles of sewerline,
please confirm that there are no high priority lines (aerial lines, any contacting surface waters, or any that
parallel streambanks that are subject to erosion).
The project does not include any aerial crossings of surface waters. All stream crossings will be installed with a
minimum cover of 4 feet in order in a steel casing to meet current design standards and protect against surface water
contact. The proposed force main alignment parallels three stream channels — Eno River, an unnamed tributary (UT) to
Cabin Branch, and a UT to Little River. The distance between the stream channels and the proposed pipe corridor are
generally in excess of 50 feet. A few, short segments of proposed force main are parallel to a stream within 50 feet of
the top of bank. The separation between the channel and the proposed pipe is greater than 10 feet, and the channels
have not been observed to be subject to erosion where the separation of the force main alignment and the stream bank
is narrower than 50 feet.
4- The revised app had a note on it beside Item VIII that states "Treyburn #4 PS is not being modified as part of the
project". The narrative that was included with the application heavily references Treyburn #2 PS (and mentions
Treyburn #3 and #4). The original Snow Hill PS permit (WQ003808) includes what appears to be Treyburn #4 P5
(@ 200 gpm). Please confirm that the PS that was included in the original permit (200 gpm) is Treyburn #4 PS.
Treyburn #4 is the pump station included in WQ003808 permit. As stated above, we looking into the permit information
for Treyburn #2 and #3 along with the force main. I will send you any information I receive regarding these as soon as I
get it.
Please let me know if there's someone else with the Town that I should be asking about previously permitted lines/PSs.
------------
Jason T. Robinson, P.E.
Raleigh Regional Office
Water Quality Regional Operations
NC Division of Water Resources, DEQ
919-791-4200
5

;Subscribe to Collection System & Sewer Permitting Updates"
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Low and may be disclosed to
third parties.
Based on the current guidance to minimize the spread of COVID-19, the Department of Environmental Quality has
adjusted operations to protect the health and safety of the staff and public. Many employees are working remotely or
are on staggered shifts. To accommodate these staffing changes, all DEQ office locations are limiting public access to
appointments only. Please check with the appropriate staff before visiting our offices, as we may be able to handle your
requests by phone or email. We appreciate your patience as we continue to serve the public during this challenging
time.
From: Porter, Brian mailto:b o rterP haze nandsaw er.com
Sent: Tuesday, August 18, 2020 7:04 PM
To: Robinson, Jason <'ai [e-mail]>; don.greelevpdurhamnc.eov
Cc: Cashion, Ted <ted.cashion (a)ncdenr.eov>; Matar, Faris <fmatarca haze nandsaw er.com>
Subject: [External] RE: Snow Hill Rd PS - Sewer Extension Application
MFEXternal email. Do not click links- or open attachments unless you verify. Send all 5uspfelous email as an. attac6e'nft� o
XeI3Ort.SPaM&nc_EGv
Jason,
Please see the attached revised pages 1 and 3 of the permit application. These were modified to reference the existing
Show Hill Road Pump Station Permit WQ0038008. Also attached is a revised summary letter that describes the work
being performed as part of the permit modification. Please let me know if you need anything more or would like to
discuss further. Thanks.
Brian
Brian Y. Porter, PE
Senior Associate I Hazen and Sawyer
4011 WeslChase Blvd, Suite 500, Raleigh, NC 27607
919-863-1011 (direct)1 540 250-1978 (cell)
bporterCcDhazenandsawyer.com I hazenandsaner.com
From: Robinson, Jason <'ason.t.robinson ncdenr. ov>
Sent: Thursday, August 6, 2020 4:14 PM
To: Porter, Brian <b o rterC@ haze nandsaw er.com>; [e-mail]
Cc: Cashion, Ted <[e-mail]>
Subject: Snow Hill Rd PS - Sewer Extension Application
External Email - think before you click
Mr. Greeley and Mr. Porter,
We received the application for the referenced sewer extension.
A permit has already been issued for the Snow Hill Rd. PS (WQ0038008, attached). We think because of this, this new
application should be a request for a modification to WQ0038008, instead of a request for a new permit.
The modification application should include everything that was in the original permit that will stay in operation, it
should not include anything that was in the original permit that will be taken out of service, and include any additional

lines that will be installed as part of the new construction. The new permit that is issued will completely replace the old
permit.
Let me know if you have any questions.
-Jason
------------
Jason T. Robinson, P.E.
Raleigh Regional Office
Water Quality Regional Operations
NC Division of Water Resources, DEQ
919-791-4200
"Subscribe to Collection System & Sewer Permitting Updates"
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to
third parties.
Based on the current guidance to minimize the spread of COVID-19, the Department of Environmental Quality has
adjusted operations to protect the health and safety of the staff and public. Many employees are working remotely or
are on staggered shifts. To accommodate these staffing changes, all DEQ office locations are limiting public access to
appointments only. Please check with the appropriate staff before visiting our offices, as we may be able to handle your
requests by phone or email. We appreciate your patience as we continue to serve the public during this challenging
time.

Robinson, Jason
From: Porter, Brian < b porter@ haze na ndsawyer.co m >
Sent: Thursday, October 22, 2020 2:20 PM
To: Robinson, Jason; Greeley, Don
Cc: Cashion, Ted
Subject: RE: [External] RE: Snow Hill PS
Attachments: Robinson_NCDENR_102220.pdf; Pages from FTA 04-16 (Update) (1).pdf
E. ernai email, Do not cliawinks-or open attachments unlbtsyou verify, Send all s0spildlous email'as an:attaftnentto-
�,i?�ttt�m�r�c,c�ov - - - - --
Jason,
Attached is a letter describing the pumps and pump conditions for the SHRPS and the minor changes in pipeline lengths
that occurred since the original permit application submittal. I have also attached a revised page 3 that updates the
pipeline diameters and lengths.
The additional pump station in the permit is the 200 gpm Treyburn #t4 pump station. This station is not being modified.
The only change related to it is that it will now discharge into SHRPS and be repumped to Eno Pump Station. Previously
the stations share a common force main.
Please let me know if you need any additional information. Thanks.
Brian
Brian Y. Porter, PE
Senior Associate I Hazen and Sawyer
4011 WestChase Blvd, Suite 500, Raleigh, NC 27607
919-863-1011 (direct) 1 540 250-1978 (cell)
bporter'lhazenandsawver.com I hazenandsawver.com
From: Robinson, Jason <[e-mail]>
Sent: Wednesday, October 21, 2020 2:00 PM
To: Porter, Brian <[e-mail]>; Greeley, Don <[e-mail]>
Cc: Cashion, Ted <[e-mail]>
Subject: RE: [External] RE: Snow Hill PS
Thanks Brian,
One thing that came up in the past, but got lost in the shuffle, is that the original Snow Hill PS Permit (WQ0038008
issued in Sept 2015) contained a 200 gpm pump station (in addition to the Snow Hill PS). Therefore, the application and
subsequent permit will need to contain the 200 GPM PS (if it's to stay I operation). I'm pretty sure that's one of the
Treyburn PSs, but I can't recall which one.
------------
Jason T. Robinson, P.E.
Raleigh Regional Office
Water Quality Regional Operations
NC Division of Water Resources, DEQ
919-791-4200

"{Subscribe to Collection System & Sewer Permitting Updates"
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to
third parties.
Based on the current guidance to minimize the spread of COVID-19, the Department of Environmental Quality has
adjusted operations to protect the health and safety of the staff and public. Many employees are working remotely or
are on staggered shifts. To accommodate these staffing changes, all DEQ office locations are limiting public access to
appointments only. Please check with the appropriate staff before visiting our offices, as we may be able to handle your
requests by phone or email. We appreciate your patience as we continue to serve the public during this challenging
time.
From: Porter, Brian[mailto:bporter@haze nandsawver.coml
Sent: Tuesday, October 20, 2020 4:18 PM
To: Robinson, Jason <[e-mail]>; Greeley, Don <[e-mail]>
Cc: Cashion, Ted <[e-mail]>
Subject: [External] RE: Snow Hill PS
External email. bo rat clidkalinks or open attachments unless you verify. Send all susplcious-email as aniattacbment
r�epart:��am��na�r_-o�
Jason,
Per our conversation, I'll provide you a summary letter to be included with the application to that describes the pump
station operations because it will have three pumps (2 high flow and 1 low flow) with one high flow and the low flow
contributing to firm capacity. I'm also confirming the pipeline lengths and will have you confirmations and the letter
tomorrow. Thanks.
Brian
Brian Y. Porter, PE
Senior Associate I Hazen and Sawyer
4011 WestChase Blvd, Suite 500, Raleigh, NC 27607
919-863-1011 (direct)1540 250-1978 (cell)
bporterCcDhazenanclsaner.com ! hazenandsawyer.com
From: Robinson, Jason <[e-mail]>
Sent: Tuesday, October 20, 2020 3:05 PM
To: Porter, Brian <[e-mail]>; Greeley, Don <[e-mail]>
Cc: Cashion, Ted <[e-mail]>
Subject: Snow Hill PS
Caution! External email — think before you click
Don & Brian,
Since this has been going on for so long, I wanted to confirm that what you submitted in your Fast Track Application
(FTA) for the Snow Hill Pump Station is still correct. Specifically, you proposed:

• 295 LF of 30" Gravity
• 165 LF of 24" Gravity
• 14,450 LF of 20" FM
• 2,920 GPM Pump Station
Are these the lengths and sizes you are still proposing? And none of these lines are replacing lines that are in another
permit, to your knowledge?
Thanks,
Jason
------------
Jason T. Robinson, P.E.
Raleigh Regional Office
Water Quality Regional Operations
NC Division of Water Resources, DEQ
919-791-4200
*"Subscribe to Collection System & Sewer Permitting Updates**
E-mail Correspondence to and from this address may be subject to the North Carolina Public Records Low and may be disclosed to
third parties.
Based on the current guidance to minimize the spread of COVID-19, the Department of Environmental Quality has
adjusted operations to protect the health and safety of the staff and public. Many employees are working remotely or
are on staggered shifts. To accommodate these staffing changes, all DEQ office locations are limiting public access to
appointments only. Please check with the appropriate staff before visiting our offices, as we may be able to handle your
requests by phone or email. We appreciate your patience as we continue to serve the public during this challenging
time.

Hazen
October 22, 2020
Ha?en and Sawyer
4011 WeslChase Blvd, Suite 300
Rateigh, NC 27607 • 919 833 7152
Jason T. Robinson, P.E.
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Water Quality Regional Operations Section
512 N. Salisbury St., Suite 925
Raleigh, North Carolina 27604
Re: Snow Hill Road Pump Station
Dear Mr. Robinson:
Hazen and Sawyer is submitting revisions to the Pump Station application package to
request revision of Sewer Permit W00038008 for replacement of the Snow Hill Road
Pump Station (SHRPS) and the associated gravity sewer and force main for the City of
Durham. This revision includes the below description of the pumping operations for the
pump station and adjustments to the permitting pipeline lengths.
Pumping operation
The SHRPS pumping capacity was designed for two phases based on future flow
projections. The required capacity is 6.94 MGD in Phase 1, and 11 MGD in Phase 2. The
pump station will utilize three (3) pumps in Phase 1 (2 duty/ 1 standby) and four (4) pumps
(3 duty/ 1 standby) in Phase 2. The pump station will be equipped with one (1) low flow
pump and two (2) high flow pumps in Phase 1 and one (1) low flow pump and three (3)
high flow pumps in Phase 2. All pumps will be capable of contributing to firm capacity and
one of the high flow pumps will serve at the redundant pump for the station.
The pumps installed in Phase 1 will be designed with the Phase 2 flows in mind to ensure
a cost-effective transition from Phase 1 to Phase 2. Doing this will avoid replacing all 3
pumps in the future and instead add an identical fourth pump in Phase 2. The design
operating points are:
Flow m
blow MIDI
I TDH
One Low Flow Pug!
1,800
2.6
140
Tw_o High Flow Pum s
12,920
14.2
1 140
With this pump sizing method, the Phase 1 pumps are expected to meet a higher firm
capacity of 8.6 MGD. The resulting pump operating points for Phase 1 are below:
Flow m
Flow MGD
TDH ft
One Low Flow Pu— - rno
2,500
13.6
140
Two High Flow Pump s
3,472
5.0
1 140
hazenandsawyer.com

— Z — October 22, 2020
Pipe Length and Diameter Adjustments
The gravity sewer and force main pipe lengths were also revised since the original
submittal. For the gravity sewer, value engineering items resulted in the majority of the 30-
inch sewer line to be downsized to 24-inch. While on the force main, additional length is
required due to the selection of installation by directional drilling for a section of the force
main. The decision to perform the directional drill was in part to reduce costs and risks
associated with the pipeline installation under and near the Eno River and tributary
streams to the Eno River. The directional drill is listed as a 24-inch HDPE line. A larger
diameter HDPE pipe is required to achieve the same internal diameter as the 20-inch
DIPIFRP force main. Attached is a revised page 3 of the fast track permit application with
the updated pipeline lengths and diameters.
If you have any questions regarding this submittal, please don't hesitate to contact me at
919-833-7152 orb [e-mail].
Best Regards,
/Y it
Brian orter, P.E.
Senior Associate
Hazen and Sawyer

WATER MANAGEMENT
CITY OF DURHAM
October 20, 2020
Mr. Jason Robinson
NC DEQ —Raleigh Regional Office
3800 Barrett Drive
Raleigh, NC 27609
Subject: Snow Hill Rd PS — Existing Snow Hill Capacity
Dear Mr. Robinson;
In response to your October 8, 2020 email to Hazen & Sawyer and myself, please find a Flow Tracking for Sewer
Extension Applications (FTSE 10-18) form completed for the existing Snow Hill Lift station prior to the proposed
upgrades. This form reflects current conditions at the Snow Hill Lift station and includes the additional flow
requested Corning, Merck and Novo Nordisk.
Below, please find additional information on the numbers used to complete FTSE 10-18:
• Section Lf: Total flow for this specific request - This number is the sum of the Average Daily Flow (ADF)
requested by Merck, Corning and Novo Nordisk.
• Section 11, Firm Capacity • This number is the maximum flow rate the lift station is currently capable of
pumping with its largest pump out of service. The Snow Hill Road lift station shares a force main with
two other lift stations, when the other lift stations are pumping Snow Hill Road is not capable of
pumping at this rate_
• Section ILA Design Average Daily Flow —This calculation is based on a peaking factor of 2.56. This is the
observed peak of the Snow HRI Road LS based on 2020 flows to date and is consistent with the heavy
industrial discharge presence in the basin.
• Section 11.8: Approximate Current Average Daily Flow — This number is an average of flows to date based
on Snow Hill Lift Station pump runtimes. This number was not adjusted to reflect the instances where
Snow Hill is pumping at the same time as the other lift stations that share its force main.
• Section II,C: Obligated Not Yet Tributary Daily Flow -- The City of Durham has currently held all collection
system extension permits as well as industrial discharge permits or permit modifications in th,s basin.
The requested additional discharge to the Snow Hill Lift Station is in excess of the remaining available pumping
capacity at the existing station. The diameter of the existing wetwell is also not sufficient to meet the state's
minimum design criteria for cycle times with the additional flow requested The lift stations that share a force
main with the Snow Hill Lift Station would also be adversely impacted by the runtimes associated with the
additional flow requested to Snow Hill.
If you have any additions, questions, comments or concerns please contact Jerry Morrone at [phone], ext
35243 or Jerry. Morro ne@Durham NC.gov,. or Bryant Green at [phone], ext 35268 or
Bryant-Green@DurhamNC,gov_
1600 Mist Lake Dr Durham, NC 27704 919,560 4381 DurharriNC.gov Follow Us @CitVofDurhamNC

Sincerely,
Donald F. Greeley, PE, PLS
Director
Department of Water Management
Cc: Jerry F. Morrone, PE
Bryant Green, PE
1600 Mist Lake Dr. Durham, NC 27704 I
I 919.560.4381 DurharnNC.gov � Follow Us @CityofDurhamNC
0 0

State of North Carolina
Department of Environmental Quality
Di%ision of Water Resources
Flow Tracking for Suter Extension Applications
(FTSE 10-18)
Entity ReRucsting Allocation: Citv of Durham
Project Name for which flow is being requested: Snow Hill Road Pump Station
Atom than orte FTSE mar be required fora srrr4Tle project rf the onrrrer of thr JJ7t'7T is uut respuxsifilr jor all Pump
sturt ons ahnig the rogue of the proposed ovasteiraterJlmr.
I. Complete this section only if you are the owner of the wastewater treatment plant_
a. WWTP Facility Name: North Durham Water Reclamation Facility
b_ WWTP Facility Permit #: NC 0023841
e. WWTP facility's permitter! flow10 Ffll flr�rrs are in �1ICD
d, Estimated obligated flow not yet tributary to the WWTP 4.82
e. WWTP facility's actual avg. flow 9.93
f, Total floe for this specific request 0.30
g_ Total actt.;al and obligated flows to the facility 14.75
11. Percent of permitted tlow used 73.8
If. Complete this section for each pump station you are responsible for along the rnutc of this proposed
%wastewater flow,
List pump stations located between the project connection point and the WWTP.-
(A)
(B)
(C)
(D)-(B+C)
(£)-(A-D)
Design
Purnp
Purrrp
Avera!_e
Daily
Appr ix.
Current
Obheated.
Not Yet
Tota! Curren=
Station
Stition
Firm
Flow**
Mg. Daily
Tributary
Flow Plus
(Name or
Number)
Permit
No,
Capacity,
LFirm / pft,
now,
Daily Flow.
Obligated
Available
Snow
MGD
MGD
N-1613
NIGD
Flow
Capacity'**
NVQ0038008
1.62
0.63
0.34
0
0.34
0.29
* 'fate Firm Capacity (design flow) of any pump station is defined as the masinlunt pumped flow
that can be achieved with the largest pump taken out of ser�7ce.
** Design Average Daily blow is the firm capacity of the purnp station divided 11 a peaking factor
(14) not less than 2.5, per Section 2.02(A)(4)(c) of the N,Iinimum Design Criteria.
*** A Planning Assessment Addendurn shall he attached for- each pump station located
between the project connection point and the WWTP where the Available Capacity is < 0,
Downstream Facility Name (Sewer): North Durham WRF
Downstream Permit Number: NCO023841
Page I of 6
I TS F 10-1

IH. Certification Statement:
0�1 ''` �( certify to the hest ofnly knowledge that the addition elf'
the volume of wastewater to be prrnitted in this project ]las been evaluated along the route to the receiving
wastewater treatment Facility and that the no�c, frorll this prrlject is not aalticipated to cause any capacity
related sanitary sewer overflows or overburden any downstream pump station en route to the receiving
treatment plant under normal circunlstarlces. given the Irrlplerrlentation of the planned Improvelllents
identified in the planning assessment where applicable. This analysis has been performed in accordance
with local established policies and procedures using the best available data. This certification applies to
those items listed above ill Sections I and II plus all rItl lcile(l planning assessment adderlclums for vvhich 1
am the responsible party. Signatlla'C (If thiS forall Cel lifle5 that the receiving Ctl]]L'L'11011 SyStelll or treatment
works has adequate capacity to trslnspolrt an(I treat the 1)roposed new wastewater.
Sigrrirrg [7. icicrl Sigrrut ti r c�
�f/'GGro
Tille 01'Signing afJici(t!
r
DC11C
PLItie i of 6
FTS 1, 10-15