SW3220402_O&M Agreement/Plan_20220627

Operation & Maintenance Agreement
Project Name: Village at Granite Quarry - Phase 2
Project Location: 3040 Faith Road, Salisbury, Rowan Co, NC 28146
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 & con
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:
0&M sheets will bf
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:
aaoeo
BM
BMP8
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 Webb
Title & Organization: VP of Acquisitions and Development 1 LGI Homes - NC, LLC
Street address: 3037 Sherman Drive
City, state, zip: Lancaster, SC 29720
Phone number(s): 704-297-0693
Email: [e-mail]
Signature:
I2ts i JgFF f Son , a Notary Public for the State of
County of Mr Ll- [(-A kJo r � do hereby certify that
personally appeared before me this and day of 0 Afa
acknowledge,thq ,4WP,px ecution of the Operations and Ma' enance Agreement.
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STORM-EZ 2/18/2022
Version 1.5 0&M Agreement Page 1 of 1

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:
The entire wet pond
Trash/debris is present.
Remove the trash/debris.
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
Unclog the pipe. Dispose of the sediment off -site.
applicable).
The inlet pipe is cracked or
otherwise damaged (if
Repair or replace the pipe.
The inlet device
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
stora e.
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 Requirements (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.
depth.
Algal growth covers over
Consult a professional to remove and control the algal growth.
p g
The main treatment area
50% of the area.
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
Prune according to best professional practices.
needed to maintain optimal
plant health.
The vegetated shelf
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.
The embankment
on the embankment.
An annual inspection by an
appropriate professional
Make all needed repairs immediately.
shows that the
embankment needs repair.
Clogging has occurred.
gg g
Clean out the outlet device and dispose of any sediment in a
location where it will not cause impacts to streams or the SCM.
The outlet device
The outlet device is
Repair or replace the outlet device.
damaged.
Weeds or volunteer trees
Remove the weeds or trees.
a
re growing on the mat.
Floating wetland island
(if applicable)
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 remediate 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
Contact the local NCDEQ Regional Office.
or sedimentation in the
receiving water.

Wet Detention Pond Design Summary
Wet Pond Diaaran
WET POND ID
BMP 7
Pretreatment other EN
than forebay?
Has Veg. Filter?s
FOREBAY
Permanent Pool El.
721.5
Temporary Pool El:
727.7
Clean Out Depth:
5.5
Sediment Removal El
716
Bottom Elevation:
715.3
MAIN POND
Permanent Pool El.
721.5
Temporary Pool El:
727.7
Clean Out Depth:
7
Sediment Removal El
714.5
Bottom Elevation:
714

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 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:
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
Regrade the soil if necessary to remove the gully, plant ground
erosive gullies have
cover and water until it is established. Provide lime and a one -
The perimeter of the
formed.
time fertilizer application.
sand filter
Vegetation is too short or
Maintain vegetation at an appropriate height.
too long.
The structure is clogged.
Unclog the structure and dispose of sediment in a location
The flow diversion
where it will not cause impacts to streams or the SCM.
structure (if applicable)
The structure is damaged.
Make any necessary repairs or replace if the damage is too
much for repair.
The inlet pipe is clogged (if
Unclog the pipe and dispose of sediment in a location where it
applicable).
will not cause 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
swale (if applicable).
devices such as reinforced turf matting or riprap to avoid future
problems with erosion.
Stone verge is clogged or
Remove sediment and clogged stone and replace with clean
covered in sediment (if
stone.
applicable).
Sediment has
Search for the source of the sediment and remedy the problem
accumulated to a depth of
if possible. Remove the sediment and dispose of it in a location
greater than six inches.
where it will not cause impacts to streams or the SCM.
Sediment chamber
(forebay)
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.

Sand Filter Maintenance Requirements (continued)
SCM element:
Potential problem:
How to remediate the problem:
Sand chamber and
Water is ponding on the
Check to see if the collector system is clogged and flush if
underdrain collection
surface for more than 24
necessary. If water still ponds, remove the top few inches of
system
hours after a storm.
filter bed media and replace. If 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 it will not cause impacts to streams or the SCM.
The outlet device
The outlet device is
Repair or replace the outlet device.
damaged.
Erosion or other signs of
damage have occurred at
Repair the damage and improve the flow dissipation structure.
the outlet.
Discharges from the sand
The receiving water
filter are causing erosion
Contact the local NCDEQ Regional Office.
or sedimentation in the
receiving water.