SW3220202_O&M Agreement/Plan_20221102

Operation & Maintenance Agreement
Project Name: WAXHAW TOWN CAMPUS
Project Location: 4220 WAXHAW MARVIN ROAD, WAXHAW, NC
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 & co
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:
Low Density
Present:
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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:
iVegetated swales/roadside ditches
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: JEFF WELLS
Title & Organization: TOWN MANAGER, TOWN OF WAXHAW
Street address: 1150 N. BROOME ST.
City, state, zip: WAXHAW, NC 28173
Phone number(s): 704-843-2195 EXT. 254
Email: JWELLS(a)WAXHAW.COM
Signature: /� �U V Gee/ Date:
a Notary Public for the State of
County of ��jy�,�,�ri-x� do hereby certify that
personally appeared before me this day ofand
acknowledge the due execution of the Operations and Maintenance Agreement.
Witness my hand and official seal,
Wendy F D�venport
NOTARYUBLIC
Union Cou ty, NC
My Commission Expires ptember 10, 2022
Seal My commission expires
STORM-EZ
Version 1.5
O&M Agreement
6/9/2022
Page 1 of 1

Sand Filter Maintenance Requirements
Important operation and maintenance procedures:
- Manage the drainage area to reduce the sediment load to the sand filter.
Clean out the sedimentation chamber or forebay whenever sediment depth exceeds six inches.
At least once a year, skim the sand media
- Replace the sand filter media whenever it fails to function properly after maintenance.
After the sand filter is established, it shall be inspectgdarterly 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 availabl u
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:
Entire sand filter
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.
Areas of bare soil and/or erosh
Regrade the soil if necessary to remove the gully, plant ground cover an
The perimeter of the sand
gullies have formed.
water until it is established. Provide lime and a one-time fertilizer applica
filter
Vegetation is too short or too
Maintain vegetation at an appropriate height.
long.
The structure is clogged.
Unclog the structure and dispose of sediment in a location where it will n
The flow diversion structure
cause impacts to streams or the SCM.
(if applicable)
The structure is damaged.
Make any necessary repairs or replace if the damage is too much for re
The inlet pipe is clogged (if
Unclog the pipe and dispose of sediment in a location where it will not ca
applicable).
impacts to streams or the SCM.
The inlet pipe is cracked or
otherwise damaged (if
Repair or replace the pipe.
applicable).
The inlet device
Erosion is occurring in the
Regrade the swale if necessary and provide erosion control devices suc
swale (if applicable).
reinforced turf matting or riprap to avoid future problems with erosion.
Stone verge is clogged or
covered in sediment (if
Remove sediment and clogged stone and replace with clean stone.
applicable).
Sediment has accumulated
Search for the source of the sediment and remedy the problem if possibl
'Remove
the sediment and dispose of it in a location where it will not cau
depth of greater than six inch:
impacts to streams or the SCM.
Sediment chamber (forebay)
Erosion has occurred.
Provide additional erosion protection such as reinforced turf matting or ri
if needed to prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by hand. If a pesticide is used, wipe it on
plants rather than spraying.
ion
on.
ir.
se
as
the

Sand Filter Maintenance Requirements (continued)
SCM element:
Potential problem:
How to remediate the problem:
Water is ponding on the surfac
heck to see if the collector system is clogged and flush if necessary. If
Sand chamber and
for more than 24 hours after a
water still ponds, remove the top few inches of filter bed media and repla
underdrain collection syste
storm.
water still ponds, then consult an appropriate professional.
Clogging has occurred.
gg g
Clean out the outlet device and dispose of sediment in a location where i
not cause impacts to streams or the SCM.
The outlet device
The outlet device is damaged.
Repair or replace the outlet device.
Erosion or other signs of
damage have occurred at the
Repair the damage and improve the flow dissipation structure.
outlet.
The receiving water
Discharges from the sand filter
are causing erosion or
Contact the local NCDEQ Regional Office.
sedimentation in the receiving
water.
:e. If
will

Low Density Maintenance Requirements I
Important maintenance procedures:
The drainage area to the vegetated conveyance or vegetated receiving area will be carefully managed to reduce the
sediment load to the vegetated conveyance or vegetated receiving area.
After the initial fertilization to establish the grass in the vegetated conveyance or the vegetated receiving area, fertilizer
will not be applied to the vegetated receiving areas.
The vegetated conveyance or vegetated receiving area will be inspaoisdterly 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.
SCM element:
Potential problem:
How to remediate the problem:
Vegetation
Vegetation is too short or too
Maintain grassed vegetation such that the swale or vegetated area does
long.
erode during the peak flow from the 10-year storm
Trash/debris is present.
Remove the trash/debris.
Regrade the soil if necessary to remove the gully, and then re -sod (or pl
Areas of bare soil and/or erosi
with other appropriate species) and water until established. Provide lime
Vegetated receiving areas
gullies have formed.
a one-time fertilizer application.
Trees and/or other woody
vegetation are present in the
Remove the trees and woody vegetation from the swale, regrade the sw
Swale.
necessary and re-establish grass as shown on the approved plans.
Trash/debris is present.
Remove the trash/debris.
Regrade the soil if necessary to remove the gully, and then re -sod (or pl
Areas of bare soil and/or erosi
with other appropriate species) and water until established. Provide lime
gullies have formed.
a one-time fertilizer application.
Sediment covers the grass at
Remove sediment and dispose in an area that will not impact streams or
the bottom of the swale.
SCMs. Re -sod if necessary.
Vegetated conveyances
swales / roadside ditches
(other than curb outlet
Regrade the slopes to the permitted configuration per the approved plan
swales)
The side slope is steeper than
reestablish vegetation. If as -built or existing conditions do not allow the
the approved configuration.
slopes to be regraded, contact the applicable permitting agency.
Determine the source of the problem: soils, hydrology, disease, etc. Re
Grass is dead, diseased or
the problem and replace plants. Provide a one-time fertilizer application
dying.
establish the ground cover if necessary.
Trees and/or other woody
Remove the trees and woody vegetation from the vegetated conveyance
vegetation are present in the
regrade the vegetated conveyance if necessary and re-establish grass a
vegetated conveyance.
shown on the approved plans.
of
and
le if
and
and

Clogging has occurred.
Clean out the outlet device. Dispose of the sediment off -site.
The outlet device (if
applicable)
The outlet device is damaged
Repair or replace the outlet device.
Erosion or other signs of
damage have occurred at the
Repair the damage and improve the flow dissipation structure.
outlet.
The receiving water
Discharges from the site are
causing erosion or
Contact the local NCDEQ Regional Office.
sedimentation in the receiving
water.