SW4220901_O&M Agreement/Plan_20220921

Operation & Maintenance Agreement
Project Name: Davidson Charter Academy
Project Location: 500 Biesecker Road, Lexington, NC 27295
Cover Page
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 & cc
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:
ding O&M sheets will
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s).
Location(s):
Type:
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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. I agree to notify NCDEQ of any problems with the system or prior to any changes to
the system or responsible party.
Signature:
County of
Responsible Party:
Title & Organization:
Street address:
City, state, zip:
Phone number(s):
Email:
Logan F. Alexander
Guilford
Christine England, Vice -Chairman of Davidson Charter Academy
DCA Lexington Properties, LLC
500 Biesecker Road
Lexington, NC 27295
[phone]
[e-mail]
personally appeared before me this 11th
, a Notary Public for the State of
, do hereby certify that
day of August, 2022
acknowledge the due execution of the Operations and Maintenance Agreement .
Witness my hand and official seal,
O,. OTA, ,•t�?�
•
�G•. AUB LXt'
Date: 7111 1 Z?_
North Carolina
Christine England
My commission expires 619 • I U • 2..f12.'
and
STORM-EZ 8/10/2022
Version 1.5 0&M Agreement Page 1 of 1

Wet Pond Maintenance Requirements
Important operation and maintenance procedures:
Immediately 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 groundcoverwill 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 problemsthat 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.
Areas of bare soil and/or
Regrade the soil if necessary to remove the gully, plant ground
The perimeter of the wet
erosive gullies have
cover and water until it is established. Provide lime and a one -
pond
formed.
time fertilizer application.
The inlet pipe is clogged (if
Unclog the pipe. Dispose of the sediment off -site.
applicable).
The inlet pipe is cracked or
otherwise damaged (if
Repair or replace the pipe.
The inlet device
applicable).
Erosion is occurring in the
Regrade the swale if necessary and provide erosion control
Swale (if applicable).
devices such as reinforced turf matting or riprap to avoid future
problems with erosion.
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 depth for
sediment storage.
where it will not cause impacts to streams or the SCM.
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.

Wet Pond Maintenance Requirements (Continued)
SCM element:
Potential problem:
How to remediate the problem:
Sediment has accumulated
to a depth greater than the
original design sediment
storage depth.
Search for the source of the sediment and remedy the problem if
possible. Remove the sediment and dispose of it in a location
where it will not cause impacts to streams or the SCM.
The main treatment area
Algal growth covers over
50% of the area.
Consult a professional to remove and control the algal growth.
Cattails, phragmitesor
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
needed to maintain
Prune according to best professional practices.
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-time
or dying.
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 grow
on the embankment.
Remove shrubs immediately.
Evidence of muskrat or
Consult a professional to remove muskrats or beavers and repair
beaver activity is present.
any holes or erosion.
A tree has started to grow
on the embankment.
Consult a dam safety specialist to remove the tree.
The embankment
An annual inspection by an
appropriate professional
shows that the embankment
Make all needed repairs immediately.
needs repair.
Clogging has occurred.
Clean out the outlet device and dispose of any sediment in a
location where it will not cause impacts to streams or the SCM.
The outlet dev ice
The outlet device is
damaged.
Repair or replace the outlet device.
Weeds or volunteer trees
are growing on the mat.
Remove the weeds or trees.
Floating wetland island (if
applicable)
The anchor cable is
damaged, disconnected or
Restore the anchor cable to its design state.
missing.

Wet Pond Maintenance Requirements (Continued)
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.
The receiving water
Discharges from the wet
pond are causing erosion or
Contact the local NCDEO Regional Office.
sedimentation in the
receiving water.

1
Pretreatment No
other than
Has Veg. Filter? Yes
Wet Detention Pond Design Summary
Permanent Pool El.
756
Temporary Pool El:
759.5
Clean Out Depth:
5.5
Sediment Removal
E 750.5
Bottom Elevation:
751
ATTACH ADDITIONAL SHEETS IF NECESSARY
Permanent Pool El.
756
Temporary Pool El:
759.5
Clean Out Depth:
5.5
Sediment Removal
E 750.5
Bottom Elevation:
751