WQ0036471_Variance Request Approval_20221024

DocuSign Envelope ID:7F032FA2-1EE4-45DC-ACDE-11A75E66CECA
ROY COOPER g,; ;i``y `-'
Governor 0 1 � Al
p''i
ELIZABETH S.BISER J.an*.
Secretary'
RICHARD E.ROGERS,JR. NORTH CAROLINA
Director Environmental Quality
October 24, 2022
Jeff Theberge, P.E., Engineering Manager
Cape Fear Public Utility Authority
235 Government Center Drive
Wilmington, NC 28403
Subject: Variance Request Approval
Cape Fear Public Utility Authority
Northwest Regional Pump Station and Interceptor (WQ0036471 MOD)
New Hanover County
Dear Mr.Theberge:
The Division of Water Resources (Division) has reviewed the submitted variance request
received'on August 12, 2022 and additional information received on October 24, 2022 for the
subject project. The Division will grant the variance request for the use of one interference box,
as indicated on the provided plans; subject to the following requirements in accordance with
the provisions for alternative design under 15A NCAC 02T.0105(n):
1. Pursuant to the variance request received from Norris & Tunstall Consulting Engineers,
P.C. on behalf of the Cape Fear Public Utility Authority, a variance is granted for the
construction and operation of approximately 24 linear feet of 8-inch gravity sewer within
the interference box at approximately STA 3+85 on Barnesmore Drive noted on Sheet
C2.1 of the plan set dated August 8, 2022 for the above named project.
2. Gravity sewer lines suspended through conflict/interference boxes to resolve
intersections with storm drains shall be constructed of ductile iron pipe with mechanical
joints, utilizing the materials,testing methods,and acceptability standards meeting water
main standards, in accordance with 15A NCAC 02T .0305(g). These lines shall be
designated as high-priority sewers,subject to the conditions as outlined below:
a. The section of gravity sewer as described above shall be designated as "high-
priority sewer" in accordance with 15A NCAC 02T.0402.
b. High-priority sewers shall be inspected by the permittee or its representative at
least once every six-months in accordance with the permittee's individual
system-wide collection system permit(WQCS00012).
North na nm Quality I Division W Resources
512 NorthCaroli SalisbuDepartment y Street I
of161 lEnviro Mail Serventalice Center I Raleigh,of Northater Carolina 27699-1611
WWI IGrit,
m punu 919.707 9000
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DocuSign Envelope ID:7F032FA2-1EE4-45DC-ACDE-11A75E66CECA
Regardless of the variance approval, in the event that the wastewater collection facilities fail to
perform satisfactorily, including the creation of nuisance conditions,the Permittee shall take
immediate corrective action, including those as may be required by this Division, such as the
construction of additional or replacement facilities.
All other elements of this project shall be constructed in accordance with all applicable rules
and statues including, 15A NCAC 2T;the Division of Water Resources' (Division) Gravity Sewer
Minimum Design Criteria adopted February 12, 1996 as applicable; and the Division's Minimum
Design Criteria for the Fast-Track Permitting of Pump Stations and Force Mains adopted June 1,
2000 as applicable. Approval of the variance request does not constitute approval of the
permit.
If you have any questions,please contact Charlie Miller, P.E. at(919) 707-3627 or by email at
charlie.miller@a,ncdenr.gov.
Sincerely,
c
,DocuSigned byy:p .,'`k k"W t.1fh
C464531431844FE.
for Richard E. Rogers,Jr.
Director, Division of Water Resources
by Michael Montebello
NPDES Section Chief, Division of Water Resources,DEQ
CC: T. Jason Clark,P.E.,Norris&Tunstall Consulting Engineers,P.C. ([e-mail])
Wilmington Regional Office, Water Quality Regional Operations
Municipal Permitting Unit(electronic copy)
�?), North Carolina Department of Environmental Quality I Division of R'ater Resources
512 North SalisburyStreet I1611 Mail Service Ceuter I Raleish North Carolina 27699-1611
WWI.CAROL N4� 919 707.9000
Da DepNmant of rarvorma. ae�