SW6200701_Form (O&M)_20201114

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WH Place Retail and Business Center
NC 210 South at Ray Road, Harnett County
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 irnfTIR(flatpfly. 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 & c(
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:
ing O&M tables wil
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):
I be added automatically):
NC Grid 2,018,634,2E, 536429.ON
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:
Signature:
County of
personally appeared before me this
, a Notary Public for the State of
, do hearby certify that
day of
acknowledge the due execution of the Operations and Maintenance Agreement .
Witness my hand and official seal,
?
fp-N (oev
Date:
-7-M
My commission expires
STORM-EZ 10128/202(
Version 1.4 O&M Manual Page 1 of.

Sand Filter Maintenance Requirements
Important maintenance procedures:
- The drainage area will be carefully managed to reduce the sediment load to the sand filter.
- The sedimentation chamber or forebay will be cleaned out whenever sediment depth exceeds six inches.
- Once a year, sand media will be skimmed.
- The sand filter media will be replaced whenever it fails, to function properly after maintenance.
The sand filter shall 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 will be kept in a known set location and will 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 to remediate the problem:
Entire BMP
Trash/debris is present.
Remove the trash/debris.
Adjacent pavement (if
Sediment is present on the
Sweep or vacuum the sediment as soon as possible.
applicable)
pavement surface.
Perimeter of sand filter
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 an appropriate height.
long.
Flow diversion structure
The structure is clogged.
Unclog the conveyance and dispose of any sediment offsite.
The structure is damaged.
Make any necessary repairs or replace if damage is too large for
repair.
The inlet device
The pipe is clogged.
Unclog the pipe,. Dispose of the sediment off -site.
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.
Stone verge is clogged or
Remove sediment and replace with clean stone.
covered in sediment (if
applicable),
Forebay or pretreatment
Sediment has accumulated to
Search for the source of the sediment and remedy the problem if
area
a depth of greater than six
possible. Remove the sediment and stabilize or dispose of it in a
inches.
location where it will not cause impacts to streams or the BMP.
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 a pesticide is used, wipe it
on the plants rather than spraying.
Filter bed and underdrain
Water is ponding on the
Check to see if the collector system is clogged and flush if necessary.
collection system
surface for more than 24
If water still ponds, remove the top few inches of filter bed media and
hours after a storm.
replace. If water still ponds, then consult an expert.
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.
STORM-EZ 10/28/2020
Version 1.4 O&M Manual Page 2 of 2