SW3200501_O&M Agreement_5/5/2020

1
0
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TM, 9,10MIThe Grove at Chestnut Park
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).
11
010-30V]Ff
Bioretention Cell
Quantity:
Dry Detention Basin
Quantity -
Grassed Swale
Quantity:
Green Roof
Quantity:
Infiltration Basin
Quantity:
Infiltration Trench
Quantity:
Level Spreader NFS
Quantity:
Permeable Pavement
Quantity:
Proprietary System
Quantity:
Rainwater Harvesting
Quantity:
Sand Filter
Quantity:
Stormwater Wetland
Quantity:
Wet Detention Basin
Quantity:
Disconnected Impervious Area
Present: No
User Defined BMP
Present: N0o
I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed for
each B. 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:
Date -
a Notary Public for the State of
�4k ti -V\C
County of VVA-c-' C 1k, do hearby certify that t'�W- t c' vl__. c'v%
personally appeared before me this day of and
acknowledge the due execution of the Operations and Maintenance Agreement.
Witness my hand and official seal, "y
ONYA KOMARINSKI
Notary Public, North Carolina
Mecklenburg County
My Commission Expires
April10,2022
My commission expires Z_21.

VVUL &JULURILIU11 f-,UIIU
The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one
is provided.
- 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:
rhe entire BMP Trash/debris is present.
Remove the trash/debris.
rhe perimeter of the BMP Areas of bare soil and/or
egrade 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 inlet device The pipe is clogged.
Unclog the pipe. Dispose of the sediment oft site.
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Erosion is occurring in the
egrade the sale 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.
Stone verge is clogged or
Remove sediment and replace with clean stone.
covered in sediment (if
applicable).
Tfheforebay Sediment has accumulated to
Search for the source of the sediment and remedy the problem if
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 P.
sediment 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.
The vegetated shelf Best professional practices
Prune according to best professional practices
show that pruning is needed to
maintain optimal plant health.
PlII ants are dIII A ead, diseased or Determine the source of the problem: soils, hydrology, disease, etc.
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.

IIIIIIIIIIIIII
III j;F
The' ain treatment area
Sediment has accumulated to
Search for the source of the sediment and remedy the problem if
a depth greater than the
possible. Remove the sediment and dispose of it in a location where it
original design sediment
will not cause impacts to streams or the BMP.
storage depth.
Algal growth covers over -50%
Consult a professional to remove and control the algal growth.
of the area.
Cattails, phragmites or other
Remove the plants by wiping the with pesticide (do not spray).
invasive plants cover 50% of
the basin surface.
The embankment
Shrubs have started to -grow
Remove shrubs immediately.
on the embankment.
Evidence of muskrat or beaver Use traps to remove muskrats and consult a professional to remove
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
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair. (if applicable)
The outlet device
Clogging has occurred.
Clean 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
Contact the local NC Department of Environment and Natural
damage have occurred at the
Resources Regional Office.
outlet.
I
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.

Wet Detention Pond Design Summary
Wet Pond Diagram
WET POND ID
1
Pretreatment other No
than forebay?
Has Veg. Filter? No
FOREBAY
Permanent Pool El.
Temporary Pool El:
Clean Out Depth:
Sediment Removal El:
Bottom Elevation:
686
MAIN POND
Permanent Pool El.
Temporary Pool El:
Clean Out Depth:
Sediment Removal El:
Bottom Elevation:
686
687.44
7.5
678.5
672
687.44
7.5
678.5
675
WET POND ID
Pretreatment other
than forebay?
Has Veg. Filter?
FOREBAY
Permanent Pool El.
Temporary Pool El:
Clean Out Depth:
Sediment Removal El:
Bottom Elevation:
MAIN POND
Permanent Pool El.
Temporary Pool El:
Clean Out Depth:
Sediment Removal El:
Bottom Elevation:
0
0
WET POND ID
Pretreatment other
than forebay?
Has Veg. Filter?
FOREBAY
Permanent Pool El.
Temporary Pool El:
Clean Out Depth:
Sediment Removal El:
Bottom Elevation:
MAIN POND
Permanent Pool El.
Temporary Pool El:
Clean Out Depth:
Sediment Removal El:
Bottom Elevation:
0
0
WET POND ID
Pretreatment other
than forebay?
Has Veg. Filter?
FOREBAY
Permanent Pool El.
Temporary Pool El:
Clean Out Depth:
Sediment Removal El:
Bottom Elevation:
MAIN POND
Permanent Pool El.
Temporary Pool El:
Clean Out Depth:
Sediment Removal El:
Bottom Elevation:
0
0
STORM-EZ 4/27/2020
Version 1.4 O&M Manual Page 4 of 4