SW3191204_O&M Agreement_20200515

Operation & Maintenance Agreement
Project Name:
Project Location:
Arka Heights
Old Charlotte Highway and Brick Yard Rd, Monroe, NC 28110
Cover Page
Maintenance records shall be kept on the following BMP(s). This maintenance record shall be kept in a log in a known set location.
Any deficient BMP 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 BMP(s).
The BMP(s) on this project include (check all that apply & cc
Bioretention Cell
Quantity:
Dry Detention Basin
Quantity:
Grassed Swale
Quantity:
Green Roof
Quantity:
Infiltration Basin
Quantity:
Infiltration Trench
Quantity:
Level SpreaderNFS
Quantity:
Permeable Pavement
Quantity:
Proprietary System
Quantity:
Rainwater Harvesting
Quantity:
Sand Filter
Quantity:
Stormwater Wetland
Quantity:
Wet Detention Basin
Quantity:
Disconnected Impervious Area
Present:
User Defined BMP
Present:
nding O&M tables 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):
ne aaaea a
NE and NW corners. Treated as 1 BMP
I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed for
each BMP above, and attached O&M tables. I agree to notify NCDENR 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:
Arka Heights, LLC
Ram Kalagara - Operating Manager 2
Signature: I Date: D� 0
I. /?a XJ4 /d/i�L)c r.,,e /f a Notary Public for the State of A,6 A ecr,rar,rry
County of do hearby certify that _-/Z"Z,7
personally appeared before me this day of u�, p•ZG and
acknowledge the due execution of the ORnd i enance A�e�ent .
Witness my hand and official seal,. :fie
N`MCDC)
_= oTAR P
My Comm Exp.
JAN.25,2021
n PUBLXC
Seal�f�f�ONrC�Ovn""Ay commission expires _S hvc gj—l"', 2o2(
STORM EZ
Version 1 4 0&M Manual
2/26/2020
Page 1 of 4

Wet Detention Pond Maintenance Requirements
The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if
one is provided.
Important 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 detention pond should be fertilized after the first initial fertilization that is required to
establish the plants on the vegetated shelf.
_ Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention
basin.
If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the
emergency drain should be minimized to the maximum extent practical.
Once a year, a dam safety expert should inspect the embankment.
After the wet detention pond is established, it should be inspected once a month 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 should be kept in a
known set location and must be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately.
BMP element:
Potential problem:
How I will remediate the problem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the BMP
Areas of bare soil and/or
Regrade the soil if necessary to remove the gully, and then plant a
erosive gullies have formed.
ground cover and water until it is established. Provide lime and a one-
time fertilizer application.
Vegetation is too short or too
Maintain vegetation at a height of approximately six inches.
long.
The pipe is clogged.
Unclog the pipe. Dispose of the sediment off -site.
The inlet device
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Erosion is occurring in the
Regrade the swale if necessary to smooth it over and provide erosion
swale.
control devices such as reinforced turf matting or riprap to avoid future
problems with erosion.
Remove sediment and replace with clean stone.
Stone verge is clogged or
covered in sediment (if
applicable).
Sediment has accumulated to
Search for the source of the sediment and remedy the problem if
The forebay
a depth greater than the
possible. Remove the sediment and dispose of it in a location where it
original design depth for
will not cause impacts to streams or the BMP.
sediment storage.
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, wipe it on
Weeds are present.
Best professional practices
the plants rather than spraying.
The vegetated shelf
Prune according to best professional practices
show that pruning is needed
to maintain optimal plant
health.
Determine the source of the problem: soils, hydrology, disease, etc.
Plants are dead, diseased or
dying.
Remedy the problem and replace plants. 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.
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Version 1 4 O&M Manual Page 2 of 4

Wet Detention Pond Maintenance Requirements (Continued)
The main treatment area
The embankment
Sediment has accumulated to
a depth greater than the
original design sediment
storage depth.
Algal growth covers over 50%
of the area.
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 BMP.
Consult a professional to remove and control the algal growth.
Cattails, phragmites or other Remove the plants by wiping them with pesticide (do not spray).
invasive plants cover 50% of
the basin surface.
Shrubs have started to grow j Remove shrubs immediately.
on the embankment. +
Evidence of muskrat or Use traps to remove muskrats and consult a professional to remove
beaver activity is present. beavers.
A tree has started to grow on Consult a dam safety specialist to remove the tree,
the embankment.
An annual inspection by an
appropriate professional
shows that the embankment
needs repair. (if applicable)
Make all needed repairs.
The outlet device Clogging has occurred IClean out the outlet device. Dispose of the sediment off -site.
The outlet device is damaged]Repair or replace the outlet device.
The receiving water Erosion or other signs of
damage have occurred at the
outlet.
Contact the local NC Department of Environment and Natural
Resources Regional Office.
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.
STORM-EZ 2/26/2020
Version 1.4 O&M Manual Page 3 of 4

Wet Detention Pond Design Summary
wet ronn uta ram
WET POND ID FOREBAY MAIN POND
1 West Permanent Pool El. 659 Permanent Pool El. 659
Temporary Pool El: 660 Temporary Pool El: 660
Pretreatment other No Clean Out Depth: 3 Clean Out Depth: 6
than forebay? Sediment Removal El: 656 Sediment Removal El: 653
Has Veg. Filter? Yes Bottom Elevation: 655.5 Bottom Elevation: 652.5
WET POND ID FOREBAY MAIN POND
1 East Permanent Pool El 659 Permanent Pool El. 659
Temporary Pool El: 660 Temporary Pool El: 660
Pretreatment other Clean Out Depth: 5 Clean Out Depth: 5
than forebay? No
Sediment Removal El: 654 Sediment Removal El: 654
Has Veg. Filter? Yes Bottom Elevation: 653.5 Bottom Elevation: 653.5
STORM-EZ 2/26/2020
Version 1.4 O&M Manual Page 4 of 4