SW5200501_O&M Agreement_20201006

Operation & Maiptenance A reement
Project Name: Coolwick Warehouse
Project Location: Youngs►►ille, NC
CgV.er.P!e
Maintenance records shall be kept on the following SCM(s). This maintenance record shall be kept in a log in a known set location.
Any deficient SCM elements noted in the inspection will be corrected, repaired, or replaced immediately. These deficiencies can
affect the integrity of structures, safety of the public, and the pollutant removal efficiency of the SCM(s)-
The SCM(s) on this project include (check all that apply & corresponding O&M sheets wil
Infiltration Basin Quantity:
Infiltration Trench Quantity:
Bioretention Cell Quantity:
Wet Pond Quantity.
Stormwater Wetland Quantity:
Permeable Pavement Quantity:
Sand Filter Quantity.
Rainwater Harvesting Quantity:
Green Roof Quantity:
Level Spreader - Filter Strip Quantity:
Proprietary System Quantity:
Treatment Swale Quantity:
Dry Pond Quantity:
Disconnected Impervious Surface Present:
User defined SCM Present.
Low Density Present:
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Locations):
Location(s):
Location(s):
Location(s):
Locations}:
Locations):
Locations):
Locations):
Location(s):
Location(s):
Type:
1
N❑
No
No
oe aoaea autom
ISouthwest Corner of Site I
I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed
for each SCM above, and attached O&M tables. 1 agree to notify NCDEQ of any problems with the system or prior to any changes
to the system or responsible party.
Responsible Party:
Title & Organization:
Street address:
City, state. zip:
Phone number(s):
Email:
Tim Wicker
Owner-Coolwick LLC
186 Wind Chime Court, Suite 200
Raleigh, NC 27615
919-247-6549
[e-mail]
Signature: pate- �{ 7-1 L2_0
a Notary Public for the State of #J0(.A fz' 1
County of do hereby certify that •Ct _q
personally appeared before me this i� SP day of -I and
acknowledge the due execution of the Operations 1+A�irtteri�nce Agree ent .
My colnmleslgn
exPirea
2M2i2022
�U
CPA/
seal, =
My commission expires
1), / )_),
STORM-EZ
Version 1.5 O&M Agreement
9i 1612020
Page 1 of 1

€ _ t Pond Maiit3anance Requirements (Continued]
SCM element:
Potential problem:
How to remediate the problem:
Sediment has accumulated
Search for the source of the sediment and remedy the problem if
to a depth greater than the
possible. Remove the sediment and dispose of it in a location
original design sediment
where it will not cause impacts to streams or the SCM.
storage depth.
The main treatment area
Algal growth covers over
Consult a professional to remove and control the algal growth.
5o% of the area.
Cattails, phragmites or
other invasive plants cover
Remove the plants by wiping them with pesticide (do not spray).
50% of the basin surface.
Best professional practices
show that pruning is
Prune according to best professional practices.
needed to maintain optimal
plant health.
The vegetated shelf
Determine the source of the problem soils, hydrology, disease.
Plants are dead, diseased
etc. Remedy the problem and replace plants. Provide a one -
or dying.
time fertilizer application to establish the ground cover if a soil
test indicates it is necessary.
Weeds are present.
Remove the weeds, preferably by hand. If pesticide is used,
wipe it on the plants rather than spraying.
Shrubs have started to
Remove shrubs immediately.
grow on the embankment.
Evidence of muskrat or
Consult a professional to remove muskrats or beavers and repair
heaver activity is present.
any holes or erosion.
A tree has started to grow
Consult a darn safety specialist to remove the tree.
The embankment
on the embankment.
An annual inspection by an
;appropriate
professional
shows that the
Make all needed repairs immediately.
embankment needs repair.
Clogging has occurred.
gg g
Clean out the autlet device and dispose of any sediment to a
The outlet device
location where it will not cause impacts to streams or the SCM.
The outlet device is
Repair or replace the outlet device.
damaged.
Weeds or volunteer trees
are growing on the mat.
Remove the weeds or trees
Floating wetland island
The anchor cable is
4�
(if applicable)
damaged, disconnected or
Restore the anchor cable to its design state.
missing.
......................... .
a Maintenance Requirements (Continue;d)
SCM element:
Potential problem:
How to remediate the problem:
Erosion or other signs of
damage have occurred at
Repair the damage and improve the flow dissipation structure.
the outlet.
Discharges from the wet
The receiving water
pond are causing erosion
Contact the local NCDE4 Regional Office.
or sedimentation in the
receiving water.
Wa .. on Pond Design Summat]r
F- Permanent Pool El.PIX9319166
Permanent Ppal E l: 396
Temporary Paul El: Temporary Paal El' 386.85
Prelreahnen[ other No Clean put Depth 396 clean Out Depth 396

Wet Pend Maintenance Re ulrements
Important operation and maintenance procedures:
Immediatefy after the wet detention basin is established, the plants on the vegetated shelf and
perimeter of the basin should be watered twice weekly if needed. until the plants become established
(commonly six weeks).
No portion of the wet pond should be fertilized after the initial fertilization that is required to establish
the plants on the vegetated shelf,
Stable groundcover will be maintained in the drainage area to reduce the sediment load to the wet
pond.
If the pond must be drained for an emergency or to perform maintenance, the flushing of sediment
through the emergency drain will be minimized as much as possible.
At least once annually, a dam safety expert will inspect the embankment. Any problems that are found
will be repaired immediately.
The measuring device used to determine the sediment elevation shall be such that it will give an
accurate depth reading and not readily penetrate into accumulated sediments.
After the wet pond is established, it will be inspected quarterly and within 24 hours after every storm event greater
than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance shall be kept in a known
set location and shall be available upon request.
inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately.
SCM element:
Potential problem:
How to remediate the problem:
The entire wet pond
Trash/debris is present.
Remove the trash/debris-
The perimeter of the wet
Areas of bare soil andlor
Regrade the soil if necessary to remove the gully, plant ground
pond
erosive gullies have
cover and water until it is established. Provide lime and a one -
formed.
time fertilizer application.
The inlet pipe is clogged of
Unclog the pipe. Dispose of the sediment off -site.
applicable),
The inlet pipe is cracked or
The inlet device
otherwise damaged (if
Repair or replace the pipe.
applicable).
Erosion is occurring in the
Regrade the swale if necessary and provide erosion control
swala (if applicable).
devices such as reinforced turf matting or rip rap to avoid future
problems wth erosion.
Sediment has accumulated
to a depth greater than the
Search for the source of the sediment and remedy the problem if
original design depth for
possible. Remove the sediment and dispose of it in a location
sediment storage.
where it will not cause impacts to streams or the SCfvl.
.The forebay
Erosion has occurred.
Provide additional erosion protection such as reinforced turf
matting or riprap if needed to prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by hand. If pesticide is used.
wipe it on the plants rather than spraying.