SW3191101_O&M Agreement Form_20211025

Operation & Maintenance Agreement
Project Name:
Project Location:
CAMBRIDGE VILLAGE MULTIFAMILY
Cresset Dellinger and N. Pilot Knob Rd.
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
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:
1
Low Density
Present:
g 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:
be added automatically):
NE and SW Corners of the site
French Drain - Building 7 and parking lot
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:
Title & Organization:
Street address:
City, state, zip:
Phone number(s):
Tadd M. Miller
Manager, North Pilot Knob Road, LLC
Cresset Dellinger Road
Denver, NC 28037
317 226-9500
[e-mail]
Signature: Date: )0/90 I a_
I. ell
a Notary Public for the State of Sndl c%ng _
County of f` do hereby certify that M.
personally appeared before me this �14\T day of C�UbW Q0 a I and
acknowledge the due execution of the Op r Eons/and M ntejn,,a�nce Agreement,
Witness my hand and official seal, _ e %' Q. a u".
Seat
`,0III LrJRI A CAWIMER
Notary Public, State of Indiana
Shelby County
Commission # 649274
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41 My Commission Expires
+�Il1111 November 24, 2021
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My commission expires lilJiflr► a�j, �(
STORM-EZ 10/19/2021
Version 1.5 O&M Agreement Page 1 of 6

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:
Trash/debris is present.
Remove the trash/debris.
The entire wet pond
The perimeter of the wet
Areas of bare soil and/or
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
(if applicable).
Unclog the pipe. Dispose of the sediment off -site -
The inlet pipe is cracked
The inlet device
or otherwise damaged (if
Repair or replace the pipe.
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 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 location
design depth for sediment
where it will not cause impacts to streams or the SCM.
The forebay
storage.
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 Re uirements 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 location
design sediment storage where it will not cause impacts to streams or the SCM.
The main treatment area Algal growth covers over Consult a professional to remove and control the algal growth.
150% of the area.
The vegetated shelf
The embankment
the outlet device
Floating wetland island
(if applicable)
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 needed to Prune according to best professional practices.
maintain optimal plant
health.
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
beaver activity is present, repair any holes or erosion.
A tree has started to grow Consult a dam safety specialist to remove the tree.
on the embankment.
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 is Repair or replace the outlet device.
damaged.
Weeds or volunteer trees Remove the weeds or trees.
are growing on the mat.
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 remedlate 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
or sedimentation in the
Contact the local NCDEQ Regional Office.
receiving water.

Wet Detention Pond Design Summary _
Wet Pond Diagram
WET POND ID
1
Pretreatment other No
thanforebay?
Has Veg. Filter? No
WET POND ID
2
Pretreatment other No
thanforebay?
Has Veg. Filter?
FOREBAY
Permanent Pool El.
787.5
Temporary Pool El:
788.5
Clean Out Depth:
3.5
Sediment Removal E
784
Bottom Elevation:
783
FOREBAY
Permanent Pool El.
777
Temporary Pool El:
778.3
Clean Out Depth:
4
Sediment Removal E
773
Bottom Elevation:
772
M L.II
RY
MAIN POND
Permanent Pool El.
787.5
Temporary Pool El:
788.5
Clean Out Depth:
5.5
Sediment Removal E
_
782
Bottom Elevation:
781
Permanent Pool El.
777
Temporary Pool El:
778.3
Clean Out Depth:
7
Sediment Removal t:
770
Bottom Elevation:
769

User Defined SCM Maintenance Re uirements
Section 1
Important operation and maintenanceprocedures:
- The french drains stem is defined as the pipes and stormwater inlet passively collecting and
- transmitting drainage from Building 7 and the parking lot to the wet pond.
nspect opening on pipe to ensure free flow of drainage from building and parking lot. _^
Regularly clean the pipes and drain inlet by manually removing debris.
nspect stormwater inlet drain and surrounding area to assess base flow.
The system will be inspected at least quarterly. Records of operation and maintenance will be kept in a known set
location and will be available upon request.
Section 2
Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately.
SCM element:
Potentialproblem:
How to remediate theproblem:
French drains stem
Base flow too high.
Evaluate flow impact to wet pond SCM; if base flow prevents
tem ora pool elevation from returning to the permanent pool
elevation with 5 days, remediate as needed.
Drain inlet/outlet pi es
I Pipes are clogged.
Unclog the pipe. Dispose of the sediment off -site.
Stormwater inlet drain
Sediment/debris in inlet.
Remove the sediment/debris. Dispose of the sediment off -site.