WQCS00057_Varience Request_20180829

ROY COOPER
47-* Governor
MICHAEL S. REGAN
Secretary
M l
Water Resources LINDA CULPEPPER
ENVIRONMENTAL.QUALITY
Interim Director
August 29, 2018
Kelly Craver, City Manager
City of Thomasville
P.O. Box 368
Thomasville, NC 27361
Subject: Variance Request Approval
Hank's Branch Sanitary Sewer Rehabilitation Phase I
City of Thomasville •
WQCS00057
Dear Mr. Craver: -
The Division,of Water Resources (Division) has reviewed the submitted variance request
received on August 17, 2018 for the subject project. Pursuant to the variance request received
from Alley, Williams, Carmen & King, Inc. on behalf of the City of Thomasville,the Division will
grant the variance requests described below in accordance with the provisions for alternative
design under 15A NCAC 02T.0105(n):
1. A variance is granted for the rehabilitation and operation of approximately 540 linear
feet of 18-inch gravity sewer between Manholes MH-4 and MH-5 at a slope of-0.02%,
between MH-15 and MH-16 at a slope of 0.03%, and between MH-16 and MH-17 at a
slope of-0.01%as indicated on the provided plans, specifications, and supporting
documents, and subject to the following requirements:
a. The sections 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 (WQCS00057).
c. The portion of sewer between MH-15 and MH-16 as listed above also includes
an aerial line over Hanks Branch.
2. A variance is granted for the rehabilitation and operation of various sections of
the sanitary sewer with less than 36-inches of cover from earth grade, including
portions of the sewer between MH-4 and MH-5, MH-6 and MH-7, between MH-
16, MH-17, MH-18, MH-19, MH-20, MH-21, MH-22,and MH-23,and between MH-
27 and MH-28.
Nothing Compares-t
State of North Carolina I Environmental Quality I Water Resources
1617 Mail Service Center I Raleigh,North Carolina 27699-1617
919-807-6300

City of Thomasville—WQCS00057 -
August 29,2018
3. An alternative design is approved for a ,separation between manholes of
approximately 550 linear feet between MH-8 to MH-9 and approximately 442
linear feet between MH-13 to MH-14. Per 15A NCAC 02T.0305(i)(2),the permittee
shall be responsible for maintaining the capability to perform routine cleaning and
maintenance on the portions of the sewer noted as not meeting the maximum
separation distance between manholes.
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 Christyn Fertenbaugh, P.E. at 919-707-3625 or via
email at [e-mail].
Sincerely,
&4'°{‘'` . \-1b --
for Linda Culpepper
Interim Director, Division of Water Resources
by Deborah Gore, PERCS Supervisor
Division of Water Resources, NCDEQ
cc: Glynn Fleming, P.E., Alley, Williams, Carmen & King, Inc. ([e-mail])
Steve Tsadwa, Project Manager—DWI ([e-mail])
Winston-Salem Regional Office, Water Quality Section Regional Operations (electronic)
Water Quality Central Files—WQCS00057
PERCS Files (electronic)