WQ0006254_CLOSURE PLAN_20200715

N
9uQcy 15, 2020
J U LY 15, 2020
Removal of Wastewater Treatment
Rotary Distributers and LPP Field
Corolla Light WWTP #1
ROBERT G BURGIN, JR. PE
BURGIN ENGINEERING, INC.
PO Box 1804, Irmo, SC 29063

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

and the disposal of: 40,000 GPD to the low-pressure pipe (LPP) system permitted by the Currituck
County Health Department; to serve Corolla Light Resort Development as shown below.
The purpose of this report is to outline discontinuing of the facility uses of 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.
All flow currently permitted to be treated at Corolla Light WWTP #1 is to be transferred to treatment at
the Monteray Shores WWTP. The Monteray Shores WWTP is owned by Carolina Water Service, Inc. of
N.C. Sewer force mains have already been constructed to connect the two systems together to allow
treatment at Monteray Shores. Currently, part of the wastewater generated by Corolla Light is treated
at the Monteray shores Facility. Once this closure plan goes into effect, all Corolla Light flow will be
treated at Monteray shores.
The 40,000 GPD to the low-pressure pipe (LPP) system will remain available for use as repair or addition
disposal for the Monteray Shores WWTP. The capacity will be transferred to the Monteray Shores wwtF
permit. Under this proposal, the LPP field will not be removed. It will be cleaned and capped off in a
manner to allow its use as a repair area in the future. A permit amendment has been requested under a
separate filing with NCDENR-WR.
Permit WQ0006254 shall not be rescinded until a permit modification of the Monteray Shores Permit is
modified to include the LPP field at the Whalehead Club.
Burgin Engineering, Inc.
PO Box 1804
Irmo, SC 29063

The forcemains currently routing wastewater into the treatment plant will need to be rerouted to send
flow to Monteray Shores directly. These rerouting will be permitted via NCDENR-WR Fast Track
permitting. The Fast track application has been sent to the Department.
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. DWR WARO shall be notified at 252- 946- 6481 when all wastewater
Burgin Engineering, Inc.
PO Box 1804
Irmo, SC 29063

and sludge is removed from the treatment units. No demolition will occur until a formal site visit by
DWR staff has occurred.
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
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. All monitoring and well record
reports shall be submitted to DWR WARO as soon as reports are available. Compliance sampling shall
continue until two consecutive samples are below 2L standards. Abandonment of wells shall not occur
until approval by DWR WaRO.
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:
Burgin Engineering, Inc.
PO Box 1804
Irmo, SC 29063

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
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.
All monitoring and well record reports shall be submitted to DWR WARO as soon as reports are
available.
Compliance sampling shall continue until two consecutive samples are below 2L
standards. Abandonment of wells shall not occur until approval by DWR WaRO.
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.
Burgin Engineering, Inc.
PO Box 1804
Irmo, SC 29063

I — Aerial
WQ0006254 1102 Corolla Village Rd., Corolla, NC 27927
Carolina Water Service, Inc. of NC Latitude: 36.3751990
Corolla Light WWTP #1 Longitude:-75.827801'
6
Burgin Engineering, Inc.
PO Box 1804
Irmo, SC 29063