NC0076333_Remission Request_20180822

„SHIELD
ENGINEERING, INC.
August 20, 2018 RECEIVED/DENR/DWR
John Hennessy AUG 2 201
8
Supervisor Water Resources
Permitting Section
North Carolina Department of Environmental Quality
Division of Water Resources
Water Quality Permitting Section-NPDES
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
Subject: Request to Rescind NPDES Permit
Shield Project Number: 1180095-01
Dear Mr. Hennessy,
Cox Auto, Inc. (Cox) contracted Shield Engineering, Inc. (Shield) to oversee the decommissioning of
the package wastewater treatment system at the Manheim Auto Auction in Statesville, North Carolina.
The auto auction installed a sanitary sewer main and connected to the City of Statesville's collection
system. The wastewater flow from the auto connection was disconnected from the onsite treatment
facility in July 2018 and no flow is being received by the treatment facility. Shield developed a technical
specification for the removal of sludge and cleaning of the wastewater treatment system and is
submitting this letter to request that NPDES permit No.NC0076333 be rescinded or coverage under the
permit terminated. The following sections describe the wastewater treatment plant and the cleaning and
verification process that was followed for decommissioning this wastewater treatment system.
General Wastewater Plant Description
The wastewater stream from the auto auction facility flowed by gravity into a grit chamber that is below
grade. This chamber included screening for the influent flow. The wastewater was then pumped to two
(2) steel equalization (EQ) basins that are above grade. The second EQ basin also included aeration and
was the only basin active prior to the facility connecting to the City's collection system. The wastewater
gravity flowed from the second EQ basin to a disinfection system that consisted of a small box where
chlorine was added. The wastewater then gravity flowed to the outfall at the creek.
Cleaning and Decommission Process
Cox Auto engaged a contractor, Bio-Nomic Services, Inc., to clean the wastewater treatment plant. Bio-
Nomic mobilized to the site on August 1, 2018 with three (3) 6,000 gallon tanker trailers, a vacuum
truck, and associated pumps and hoses. The cleaning crew began by pumping the sludge from the EQ
basins into the tanker trailers. After receiving approval, the sludge was hauled to Statesville's Fourth
Creek WWTP. After the sludge was removed the EQ basin tanks were washed and the wash water was
also hauled to Statesville's WWTP. Then the cleaning crew pumped the wastewater and solids from the
grit chamber and hauled them to Statesville's WWTP. The grit chamber also contained a small amount
of grit that Statesville's WWTP could not accept. This grit was removed to a roll off container and
disposed of in a landfill. The grit chamber was then washed and the wash water was disposed. Bio-
Nomic Services then cleaned the disinfection system and removed standing water from the chlorine
contact chamber. Bio-Nomic Services also plugged the influent and effluent pipes with cementitious
grout.
4301 Taggart Creek Road www shleldengmeedng.com Telephone [phone]
Charlotte,NC 26208 Fax [phone]
~'

Request to Rescind NPDES Permit
Cox Auto, Inc. August 20,2018
Shield Project 1180095-01 Page 2
Independent Verification
Shield was onsite to oversee portions of the cleaning and decommissioning of the wastewater treatment
plant to provide independent verification that the work was performed in accordance with the technical
specifications. Shield also coordinated with the Mooresville Regional Office of NCDEQ to schedule a
site visit with a NCDEQ representative, Wes Bell. Mr. Bell visited the site on Friday August 10, 2018
with Shield to verify the connection to the City of Statesville's sanitary sewer system and the status of
the cleaning operations.A report was generated based on his visit and is attached to this letter.
Conclusion
The onsite wastewater treatment system at Manheim Auto Auction in Statesville, North Carolina has
been disconnected from service and cleaned. Shield believes that NPDES permit No. NC0076333
should be terminated because the wastewater treatment facility has been decommissioned and no longer
accepts flow,treats wastewater, or discharges effluent.
Sincerely,
SHIELD ENGINEERING,INC.
-�f
ayden Hoggard, P.E. Robert L. Griffin, '/
Project Manager President, Principal Engineer
Attachments
NCDEQ Regional Office Inspection Report Cover Letter
H\Projects\2018\1180095-01 Cox Auto WWTP Decommrssionmg\Engmeermg\Perrmt Letter\Request to Rescind Permit docx
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NORTH CAROLINA
ROY COOPER alifrartmeittai Qualify
Gocrnor
MICHAEL S.R.EGAN
Secretary
LINDA CULPEPPER.
Interim Dtrrctor
14 August 2018
Mr.Keith Jones,Maintenance Manager
Manheim Statesville
145 Auction Lane
Statesville,North Carolina 28625
Subject: Compliance Evaluation Inspection
Manheim Statesville Auto Auction WWTP
NPDES Permit No.NC0076333
Iredell County
Dear Mr. Jones:
Enclosed is a copy of the Compliance Evaluation Inspection Report for the inspection conducted at the subject facility on
August 10, 2018,by Mr.Wes Bell of this Office.
This inspection included verification of both the connection to the City of Statesville's sanitary sewer system and the status
of the cleaning operations on the wastewater treatment facility. Once all wastewater (including solids) are removed from the
treatment facility, a request can be made to the Division to rescind the NPDES Permit. The written request must be mailed to
the following address: Division of Water Resources, Water Quality Permitting Section –NPDES, 1617 Mail Service Center,
Raleigh,NC 27699-1617, attention John Hennessy/Supervisor.
Should you have any questions concerning this letter,please do not hesitate to contact Mr. Bell at(704) 235-2192, or via
email at [e-mail].
Sincerely,
—DocuSigned by: / '
, .
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\—A14CC681 AF27425___
W. Corey Basinger,Regional Supervisor
Water Quality Regional Operations Section
Division of Water Resources,NCDEQ
Enclosure:
Inspection Report
North Carolina Department of Environmental Quality' Division of Water Resources
610 East Center Avenue l Suite 3011 Mooresville,North Carolina 28115
704 663.1699