SW4240501_O&M Agreement/Plan_20241121

Operation & Maintenance Agreement
Project Name: Reserve at Old Hollow
Project Location: 0 Old Hollow Rd (NC-66), Kernersville, NC
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&corres onding O&M sheets will be added automatically):
Infiltration Basin Quantity: Location(s):
Infiltration Trench Quantity: Location(s):
Bioretention Cell Quantity: Location(s):
Wet Pond Quantity: 2 Location(s): North end of site, east end of site
Stormwater Wetland Quantity: Location(s):
Permeable Pavement Quantity: Location(s):
Sand Filter Quantity: Location(s):
Rainwater Harvesting Quantity: Location(s):
Green Roof Quantity: Location(s):
Level Spreader- Filter Strip Quantity: Location(s):
Proprietary System Quantity: Location(s):
Treatment Swale Quantity: Location(s):
Dry Pond Quantity: Location(s):
Disconnected Impervious Surface Present: No Location(s):
User Defined SCM Present: No Location(s):
Low Density Present: No Type:
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. I agree to notify NCDEQ of any problems with the system or prior to any changes to
the system or responsible party.
Responsible Party: Robin Yaun
Title&Organization: Member,YP Walkertown, LLC
Street address: 3410 Owls Roost Rd.
City, state, zip: Greensboro, NC 27410
Phone number(s): 336-669-7651
Email:I [e-mail]
Signature: Date:
1, a Notary Public for the State of
County of do hereby certify that
personally appeared before me this day of and
acknowledge the due execution of the Operations and Maintenance Agreement.
Witness my hand and official seal,
Seal My commission expires
STORM-EZ 11/21/2024
Version 1.5 O&M Agreement Page 1 of 5

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 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.
ispection 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.
Areas of bare soil Regrade the soil if necessary to remove the gully, plant
The perimeter of the and/or erosive gullies ground cover and water until it is established. Provide
wet pond
have formed. lime and a one-time fertilizer application.
The inlet pipe is clogged
Unclog the pipe. Dispose of the sediment off-site.
(if applicable).
The inlet pipe is
cracked or otherwise Repair or replace the pipe.
The inlet device damaged (if applicable).
Erosion is occurring in Regrade the swale if necessary and provide erosion
the swale (if control devices such as reinforced turf matting or riprap
applicable). to avoid future problems with erosion.
Sediment has Search for the source of the sediment and remedy the
accumulated to a depth problem if possible. Remove the sediment and dispose
greater than the original
of it in a location where it will not cause impacts to
design depth for streams or the SCM.
sediment storage.
The forebay Provide additional erosion protection such as reinforced
Erosion has occurred. 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
Search for the source of the sediment and remedy the
accumulated to a depth problem if possible. Remove the sediment and dispose
greater than the original of it in a location where it will not cause impacts to
design sediment
streams or the SCM.
The main treatment storage depth.
area Algal growth covers Consult a professional to remove and control the algal
over 50% of the area. growth.
Cattails, phragmites or
other invasive plants Remove the plants by wiping them with pesticide (do not
cover 50% of the basin spray).
surf ace.
Best prof essional
practices show that
pruning is needed to Prune according to best professional practices.
maintain optimal plant
health.
The vegetated shelf Determine the source of the problem: soils, hydrology,
Plants are dead, disease, etc. Remedy the problem and replace plants.
diseased or dying. Provide a one-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
grow on the Remove shrubs immediately.
embankment.
Consult a professional to remove muskrats or beavers
beaver activity is
and repair any holes or erosion.
The embankment grow on the Consult a dam safety specialist to remove the tree.
An annual inspection by
an appropriate
professional shows that Make all needed repairs immediately.
the embankment needs
repair.
Clean out the outlet device and dispose of any sediment
Clogging has occurred. in a location where it will not cause impacts to streams or
The outlet device the SCM.
The outlet device is Repair or replace the outlet device.
damaged.
trees are growing on the Remove the weeds or trees.
Floating wetland
island (if applicable) The anchor cable is
damaged, disconnected Restore the anchor cable to its design state.
or missing.

Wet Pond Maintenance Requirements (Continued)
SCM element: Potential problem: How to remediate the problem:
Erosion or other signs
damage have Repair the damage and improve the f low dissipation
of occurred at the outlet. structure.
The receiving water Discharges from the
wet pond are causing
erosion or Contact the local NCDEQ Regional Office.
sedimentation in the
receiving water.

Wet Detention Pond Design Summary
Wet Pond Diagrarr
WET POND ID FOREBAY MAIN POND
1 Permanent Pool El. 962 Permanent Pool El. 962
Temporary Pool El: 963.1 Temporary Pool El: 963.1
Pretreatment No Clean Out Depth: 3 Clean Out Depth: 6
other than Sediment Removal E 959 Sediment Removal E 956
Has Veg.Filter? Bottom Elevation: 958 Bottom Elevation: 955
W ET POND ID FOREBAY MAIN POND
2 Permanent Pool El. 942 Permanent Pool El. 942
Temporary Pool El: 943.6 Temporary Pool El: 943.1
Pretreatment No Clean Out Depth: 3 Clean Out Depth: 6
other than Sediment Removal E 939 Sediment Removal E 936
Has Veg.Filter? Bottom Elevation: 938 Bottom Elevation: 935
ATTACH ADDITIONAL SHEETS IF NECESSARY