SWA000197_O&M Agreement/Plan_20240402

Operation & Maintenance Agreement
Project Name: Oakmont Subdivision Phase HI
Project Location: Harnett County
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&corresponding 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: 6 Location(s):
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: oci r t 1 rd C
Title&Organization: President,Oakmont Holding Inc.
Street address: 540 SW Broad Street
City,state,zip: Southern Pines,NC 28387
Phone number(s): 910-688-7361
Email: [e-mail]
Signature: Date: -- %,c' //,rj �
I, C1: .:S.- iJK /_yam G. fJ v s;<l�J, J ,a Notary Public for the State of
County of / 'l�;i?ram, ,do hereby certify that 67 ? -
personally appeared before me this // day of ^j A_) 1 6-1 2 Gf and
acknowledge the due execution of the OperatioA and Maintenance Agreem jnt'.
7cialsea ) 4 (..
•
•
•
,p
Seal �f�<F4sr)�'c?a," Mycommission expires
f
P
STORM-EZ 1/13/2023
Version 1.5 O&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 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 Areas of bare soil and/or Regrade the soil if necessary to remove the gully, plant ground
wet 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
(if applicable). Unclog the pipe. Dispose of the sediment off-site.
The inlet pipe is cracked
or otherwise damaged (if Repair or replace the pipe.
The inlet device applicable).
Regrade the swale if necessary and provide erosion control
Erosion is occurring in the
devices such as reinforced turf matting or riprap to avoid
swale (if applicable). future problems with erosion.
Sediment has
accumulated to a depth Search for the source of the sediment and remedy the problem
greater than the original if possible. Remove the sediment and dispose of it in a
design depth for sediment location where it will not cause impacts to streams or the SCM.
storage.
The forebay
Erosion has occurred. Provide additional erosion protection such as reinforced turf
matting or riprap if needed to prevent future erosion problems.
Remove the weeds, preferably by hand. If pesticide is used,
Weeds are present. 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 Search for the source of the sediment and remedy the problem
greater than the original if possible. Remove the sediment and dispose of it in a
design sediment storage location where it will not cause impacts to streams or the SCM.
depth.
The main treatment
Algal growth covers over
area Consult a professional to remove and control the algal growth.
50% of the area.
Cattails, phragmites or
other invasive plants Remove the plants by wiping them with pesticide (do not
cover 50% of the basin spray).
surface.
Best professional
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, diseased disease, etc. Remedy the problem and replace plants. Provide
or dying. a one-time fertilizer application to establish the ground cover if
a soil test indicates it is necessary.
Remove the weeds, preferably by hand. If pesticide is used,
Weeds are present. 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
beaver activity is present. repair any holes or erosion.
The embankment A tree has started to
grow on the embankment. 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.
Clogging has occurred. Clean out the outlet device and dispose of any sediment in a
gg g location where it will not cause impacts to streams or the SCM.
The outlet device
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 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 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 sedimentation in the Contact the local NCDEQ Regional Office.
receiving water.

Wet Detention Pond Design Summary
':I'1 '. Pone] Di>>c; arn
WET POND ID FOREBAY MAIN POND
Basin 1 Permanent Pool El. 260.5 Permanent Pool El. 260.5
Temporary Pool El: 262.3 Temporary Pool El: 262.3
Pretreatment No Clean Out Depth: 3 Clean Out Depth: 4
other than Sediment Removal E 257.5 Sediment Removal E 256.5
Has Veg. Filter? No Bottom Elevation: 257 Bottom Elevation: 256
WET POND ID FOREBAY MAIN POND
Basin 2 Permanent Pool El. 270.5 Permanent Pool El. 270.5
Temporary Pool El: 271.8 Temporary Pool El: 271.8
Pretreatment No Clean Out Depth: 4 Clean Out Depth: 5
other than Sediment Removal E 266.5 Sediment Removal E 265.5
Has Veg. Filter? No Bottom Elevation: 266 Bottom Elevation: 265
WET POND ID FOREBAY MAIN POND
Basin 3 Permanent Pool El. 297.5 Permanent Pool El. 297.5
Temporary Pool El: 298.7 Temporary Pool El: 298.7
Pretreatment No Clean Out Depth: 4 Clean Out Depth: 6
other than Sediment Removal E 293.5 Sediment Removal E 291.5
Has Veg. Filter? No Bottom Elevation: 293 Bottom Elevation: 291
WET POND ID FOREBAY MAIN POND
Basin 4 Permanent Pool El. 263.5 Permanent Pool El. 263.5
Temporary Pool El: 264.9 Temporary Pool El: 264.9
Pretreatment No Clean Out Depth: 4 . Clean Out Depth: 5
other than Sediment Removal E 259.5 Sediment Removal E 258.5
Has Veg. Filter? No Bottom Elevation: 259 Bottom Elevation: 258
WET POND ID FOREBAY MAIN POND
Basin 5 Permanent Pool El. 271.5 Permanent Pool El. 271.5
Temporary Pool El: 272.05 Temporary Pool El: 272.05
Pretreatment No Clean Out Depth: 4 Clean Out Depth: 6
other than Sediment Removal E 267.5 Sediment Removal E 265.5
Has Veg. Filter? No Bottom Elevation: 267 Bottom Elevation: 265
WET POND ID FOREBAY MAIN POND
Basin 6 Permanent Pool El. 304.5 Permanent Pool El. 304.5
Temporary Pool El: _ 305.2 Temporary Pool El: 305.2
Pretreatment No Clean Out Depth: 3 Clean Out Depth: 6
other than Sediment Removal E 301.5 Sediment Removal E 298.5
Has Veg. Filter? No Bottom Elevation: 301 Bottom Elevation: 298
ATTACH ADDITIONAL SHEETS IF NECESSARY