SW3230801_O&M Agreement/Plan_20240325

Operation & Maintenance Agreement
Project Name: Conservancy at Waxhaw Phase 3
Project Location: 6295 Hawk View Road, Waxhaw, NC (Union County)
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&corresponding O&M sheets will be added automatically):
Infiltration Basin Quantity: 5 Location(s):
Infiltration Trench Quantity: Location(s):
Bioretention Cell Quantity: Location(s):
Wet Pond Quantity: Location(s):
Stormwater Wetland Quantity: Location(s):
Permeable Pavement Quantity: Location(s):
Sand Filter Quantity: 4 Location(s):
Rainwater Harvesting Quantity: Location(s):
Green Roof Quantity: Location(s):
Level Spreader- Filter Strip Quantity: Location(s):
Proprietary System Quantity: Location(s):
Treatment Swale Quantity: Location(s):
Dry Pond Quantity: Location(s):
Disconnected Impervious Surface Present: No Location(s):
User Defined SCM Present: No Location(s):
Low Density Present: No , Type:
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: Johnathan McCall
Title&Organization: Chief Operating Officer for Dependable Development, Inc.
Street address: 2649 Brekonridge Centre Drive
City, state, zip: Monroe, NC 28110
Phone number(s): 704-401-7185
Email: [e-mail]
Signature: Date:
I, , a Notary Public for the State of
County of , do hereby certify that
personally appeared before me this day of and
acknowledge the due execution of the Operations and Maintenance Agreement .
Witness my hand and official seal,
Seal My commission expires
STORM-EZ 3/19/2024
Version 1.5 O&M Agreement Page 1 of 1

Infiltration Basin Maintenance Requirements
Important operation and maintenance procedures:
- The drainage area will be carefully managed to reduce the sediment load to the infiltration basin.
No portion of the infiltration basin will be fertilized after the initial fertilization that is required to
- establish the vegetation. Lime may be allowed if vegetation is planted on the surface of the infiltration
basin and a soil test shows that it is needed.
- The vegetation in and around the basin will be maintained at a height of four to six inches.
After the infiltration basin 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 infiltration Trash/debris is present. Remove the trash/debris.
basin
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 grass filter strip or formed. time fertilizer application.
other pretreatment area 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 three inches. where it will not cause impacts to streams or the SCM.
The structure is clogged. Unclog the conveyance and dispose of any sediment in a
The flow diversion location where it will not cause impacts to streams or the SCM.
structure (if applicable) Make any necessary repairs or replace if damage is too much
The structure is damaged. for repair.
The inlet pipe is clogged (if Unclog the pipe and dispose of any sediment in a location
applicable). where it 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 Regrade the swale if necessary and provide erosion control
Erosion is occurring in the devices such as reinforced turf matting or riprap to avoid future
swale (if applicable).
erosion problems.
Stone verge is clogged or Remove sediment and clogged stone and replace with clean
covered in sediment (if
applicable). stone.
More than four inches of Search for the source of the sediment and remedy the problem
sediment has if possible. Remove the sediment and dispose of it in a location
accumulated. where it will not cause impacts to streams or the SCM.
Erosion of the basin
The basin Provide additional erosion protection such as reinforced turf
surface has occurred or matting or riprap if needed to prevent future erosion problems.
riprap is displaced.
Water is standing more Replace the top few inches of soil to see if this corrects the
than three days after a standing water problem. If not, consult an appropriate
storm event. professional for a more extensive repair.

Infiltration Basin Maintenance Requirements (continued)
SCM element: Potential problem: How to remediate the problem:
Shrubs or trees are
growing on the Remove shrubs and trees immediately.
embankment.
The embankment An annual inspection by
an appropriate
professional shows that Make needed repairs immediately.
the embankment needs
repair.
Clogging has occurred. Clean out the outlet device and dispose of sediment in a
gg g 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.
The receiving water Discharges from the
infiltration basin are
causing erosion or Contact the local NCDEQ Regional Office.
sedimentation in the
receiving water.

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
applicable) pavement surface. Sweep or vacuum the sediment as soon as possible.
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 Regrade the swale if necessary and provide erosion control
Erosion is occurring in the devices such as reinforced turf matting or riprap to avoid future
swale (if applicable). problems with erosion.
Stone verge is clogged or Remove sediment and clogged stone and replace with clean
covered in sediment (if
applicable). stone.
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) Provide additional erosion protection such as reinforced turf
Erosion has occurred. 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. Clean out the outlet device and dispose of sediment in a
gg g 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.
The receiving water Discharges from the sand
filter are causing erosion Contact the local NCDEQ Regional Office.
or sedimentation in the
receiving water.