WQ0006254_Closure Plan_20200710

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Removal of Wastewater Treatment
Rotary Distributers and LPP Field
Corolla Light WWTP #1
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ro. �20 ROBERT G BURGIN, JR. PE
BURGIN ENGINEERING, INC.
PO Box 1804, Irmo, SC 29063
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Closure Plan for Removal of Wastewater Treatment Plant, Rotary Distributers and
LPP Field
Corolla Light WWTP #1
Statutory Authority and Permitting:
The project is permitted under the authority of the North Carolina Department of Water Resources,
Water Quality Permitting Branch, Non -Discharge Permitting. Corolla Light #1 Wastewater Treatment
Plant is authorized by Permit No. WQ0006254 dated November 1, 2016, to Carolina Water Service, Inc.
of North Carolina for the continued operation of the subject wastewater treatment and high -rate
infiltration facilities. This permit shall be effective from the date of issuance until October 31, 2021.
The facility uses two 40,000 gallon per day (GPD) rotary distributors; a 40,000 GPD high -rate spray
infiltration bed; and all associated piping, valves, controls and appurtenances and a 40,000 gallon per
day LPP disposal field; an 80,000 GPD wastewater treatment plant (train #1) consisting of: a manually
cleaned bar screen; a 20,000 gallon flow equalization tank; a flow measuring and recording system;
three aeration tanks; two clarifiers; two sludge holding tanks; tertiary filters; a tablet chlorinator; a
chlorine contact tank; and all associated piping, valves, controls and appurtenances; an 80,000 GPD
wastewater treatment plant (train #2) consisting of: a 20,000 gallon influent surge tank with a 100 cubic
feet per minute (CFM) blower; an 80,000 gallon aeration tank served by two 327 CFM blowers; two
12,000 gallon clarifiers; a 7,500 gallon sludge holding tank; two 28 square foot (sq. ft.) tertiary filters; a
tablet chlorinator; a 1,680 gallon chlorine contact tank; an effluent flow meter; an automatically
activated emergency standby generator; and all associated piping, valves, controls and appurtenances;
Burgin Engineering, Inc.
PO Box 1804
Irmo, SC 29063

On the east side of Ocean Trail (Phase 10), the removal of two (2) two 40,000 gallon per day (GPD)
rotary distributors; a 40,000 GPD high -rate spray infiltration bed as well as train #1 and train #2
described above and all associated piping, electrical, equipment and piping on Phase 10. Per the request
of the property owner, the existing electrical service for the wastewater treatment plant will not be
removed. The property owner for Phase 10 (Florida OBX #10 LLC) only wishes that the property be
backfilled to approximately the existing grade of the site. Florida OBX #10 LLC expects to make
extensive grading changes to the property by means of its development plan including compaction and
verification as needed during its own construction efforts.
Closure Plan Implementation Responsibilities:
Outer Banks Ventures, Inc. is responsible for removing all underground piping and associated structures
designated to be removed under this closure plan as well as all physical structures associated with the
wastewater treatment plant. Carolina Water Service, Inc. of North Carolina is responsible for the
removal of all wastewater and sludge associated with the wastewater treatment plant and its associated
piping. All wastewater as determined by Carolina Water Service, Inc. of NC (CWSNC) shall be pumped
through the existing force mains to the Monterey Shores wastewater treatment plant for treatment and
disposal. Atlantic Sewage, Inc. as the approved contractor for CWSNC, will remove all waste sludge to
the permitted land application site.
Once all water and solids have been removed from the facility by CWS, the steel plant shall be
thoroughly cleaned by pressure washing by OBV, and the water pumped to Monteray Shores for final
treatment by Carolina Water Service, Inc. of NC. The Project Engineer (Burgin Engineering, Inc.), upon
notification by CWS, shall inspect the plant and certify to all parties that the plant is ready for demolition
Burgin Engineering, Inc.
PO Box 1804
Irmo, SC 29063

and salvage operations to begin within seven (7) days of notification. Upon Engineer's certification, CWS
shall remove all equipment which the company wishes to keep. CWS shall inform OBV and the Project
Engineer when CWS is ready for demolition to begin. OBV's contractor shall cut the plant into
transportable section that will not retain water. The steel shall be transported to a licensed salvage yard
for disposal. Foundational concrete shall be broken into acceptable size pieces for transportation to an
approved land fill or a crushing facility for use as gravel on property owned by OBV or Florida OBX #10
LLC. The excavation caused by removal of the old wastewater plant shall be backfilled with sand
approved by the Project Engineer and Florida OBX #10 LLC. The sand backfill shall be compacted per the
direction of Florida OBX #13 LLC and the Project Engineer. The site shall be brought back to existing
grade. All piping to and from the existing wastewater plant shall be completely removed and disposed
of at an approved land fill. All electrical lines shall be disconnected from the power service. By request
to the purchaser of the Phase 10 parcel upon which Corolla Light #1 WWTP resides, the existing
electrical service and transformer shall be left after closer.
Compliance Testing:
Carolina Water Service, Inc. of N.C. will collect the three (3) samples from all active monitoring wells in
the three consecutive months following demolition for the following:
Fecal Coliform
Nitrate
Total Nitrogen
Total Dissolved Solids
Chloride
Total Organic Carbon
If the samples collected are within acceptable limits then OBV shall be free after release by regulatory
authorities to remove all monitoring wells that are located on Phase 10 owned by Florida OBX#10, LLC.
These wells are #1, #2, #3 and #7. Wells #4, #5 and #6 shall remain
The certified results of these tests and all laboratory analytical data, including QA/QC shall be delivered
to Carolina Water Service Inc. of North Carolina, and Outer Banks Ventures, Incorporated at the
following addresses:
Carolina Water Service, Inc. of N.C.
4944 Parkway Plaza Boulevard, Suite 375
Charlotte, N.C. 28217
Outer Banks Ventures, Inc.
PO Box 549
Corolla, NC 27927
Monitoring Well Removal:
There are seven (7) monitoring wells located on the properties associated with the Corolla Light WWTP
#1. The wells are shown in the aerial photograph below. Three (3) monitoring wells were located on
Currituck County Whalehead Club property. The wells located on the Whalehead property shall not be
Burgin Engineering, Inc.
PO Box 1804
Irmo, SC 29063

abandoned as the LPP field associated with these wells will remain as repair for a proposed LPP field to
be located at Monteray Shores. Four (4) wells were located on what was originally Phase 10. The four
(4) wells will be removed properly by a NC Licensed Well Driller and the driller shall provide completed
Abandonment Records to North Carolina Well Contractors Certification Commission, and the Project
Engineer.
OBV shall provide a copy of the Abandonment Record to Florida OBX #10 LLC as well as Carolina Water
Service, Inc. of N.C.. The Project Engineer shall provide a copy of the Abandonment Record to NCDENR-
WR Land Application Section.
I — Aerial M
W'Q000625
Odrolina Water Service. Inc. of NC
1102 Corolla Villa
Rd., Corolla, N(' 27927
Latitude: 36.375199'
Corolla Light WWTP 41 1 ___ _ __ Longitude:-75.827801°
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Burgin Engineering, Inc.
PO Box 1804
Irmo, SC 29063