WQCS00012_Varience Request_20181101

ROY COOPER
Governor U'
MICHAEL S.REGAN `'
Secretary -
LINDA CULPEPPER NORTH CAROLINA
Interim Director Environmental Quality
November 1,2018
Matthew Tribett, P.E., Engineering Manager
Cape Fear Public Utility Authority
235 Government Center Drive
Wilmington, NC 28403
Subject: Variance Request Approval
CFPUA Pump Station 26&27 Upgrades
Cape Fear Public Utility Authority(WQCS00012)
New Hanover County
Dear Mr.Tribett:.
The Division of Water Resources (Division) has reviewed the submitted variance request received on,
August 14, 2018 with additional information received September 28, 2018 for the upgrades to Pump
Station 26; and the variance request received November 1, 2018 for the upgrades to Pump Station 27.
The Division will grant the variance requests for the upgrades of Pump Station 26 and Pump Station 27,in
accordance with the provisions for alternative design under 15A NCAC 02T.0105(n):
1. Pursuant to the variance requests received on August 14, 2018 with additional information
received September 28,2018 for Pump Station 26 and on November 1,2018 for Pump Station 27,
both from John S. Tunstall, P.E. on behalf of the Cape Fear Public Utility Authority, a variance is
granted for the construction and operation of the upgrades to both Pump Station 26 and Pump
Station 27 located within 50-feet of wetlands, as indicated on the provided plans and
supplementary documentation.
a. Per the provided plans and supplementary documentation,the proposed upgrades shall
include the following items:
i. Watertight pipe connections consisting of a flexible watertight rubber boot or
compression type connector.
ii. Watertight hatches on the existing wet wells.
2. An alternative design is approved for the existing pump station finished floor elevations and
replacement generator pads for both Pump Station 26 and Pump Station 27, located less than
2-feet above the 100-year flood, in accordance with the provided plans and supplementary
information.
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.
!D_EQ„,)
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11617 Mail Service Center I Raleigh,North Carolina 27699-1617
919.707.9000

Cape Fear Public Utility Authority–WQCS00012
November 1,2018
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 Christyn Fertenbaugh at 919-707-3625 or via email at
[e-mail].
Sincerely,
LO1/43J&I"L*-}"—
for Linda Culpepper
Interim Director, Division of Water Resources
by Deborah Gore, PERCS Supervisor .
Division of Water Resources, NCDEQ
cc: John S.Tunstall, P.E., Norris&Tunstall Consulting Engineers, P.C. ([e-mail]) •
Wilmington Regional Office,Water Quality Section (electronic copy)
Water Quality Central Files–WQCS00012
PERCS Files(electronic copy)