SW3220702_O&M Agreement/Plan_20230703

Operation & Maintenance Agreement
Project Name: Preserve at Forest Creek Phase 2
Project Location: Waxhaw, NC
Cover Page
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 inmediately. 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&corresponding O&M tables will be added automatically):
Bioretention Cell Quantity: Location(s):
Dry Detention Basin Quantity: _ Location(s):
Grassed Swale Quantity: Location(s):
Green Roof Quantity: Location(s):
Infiltration Basin Quantity: Location(s):
Infiltration Trench Quantity: Location(s):
Level Spreader/VFS Quantity: Location(s):
Permeable Pavement Quantity: Location(s):
Proprietary System Quantity: Location(s):
Rainwater Harvesting Quantity: Location(s):
Sand Filter Quantity: Location(s):
Stormwater Wetland Quantity: Location(s):
Wet Detention Basin Quantity: 6 Location(s): Around outer perimeter of site
Disconnected Impervious Area Present: No Location(s):
User Defined BMP Present: No Location(s):
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: Darren L. Sutton
Title & Organization: Waxhaw Ventures, LLC.
Street address: 1101 South Blvd#106
City, state, zip: Charlotte, NC, 28203
Phone number(s): 704-361-9100
Email: [e-mail]
Date: qq
Signature: I
1, L�nda. r1<C J , a Notary Public for the State f Nt�-th � I{(1 �-
County of h) th , do hearby certify that L) r") L_ ► t U n
personally appeared before (Tie this 11111 day of ��3 and
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acknowledge the due execution of th- nt
Witness my hand and official seal, , •I I bP okOntliyhtis
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Seal My commission expires
STORM-EZ 1/24/2023
/ersion 1.4 O&M Manual Page 1 of 4

Wet Detention Pond Maintenance Requirements
The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one
is provided.
Important 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 detention pond should be fertilized after the first initial fertilization that is required to-
establish the plants on the vegetated shelf.
Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention
basin.
_ If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the
emergency drain should be minimized to the maximum extent practical.
- 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:
The entire BMP 'Trash/debris is present. Remove the trash/debris.
The perimeter of the BMP 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 a height of approximately six inches.
long.
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).
The forebay '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 BMP.
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.
'Plants are dead, 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.
STORM-EZ 6/23/2023
Version 1.4 O&M Manual Page 2 of 4

Wet Detention Pond Maintenance Requirements (Continued)
The main 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 them 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.
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.
STORM-EZ 6/23/2023
Version 1.4 O&M Manual Page 3 of 4

Wet Detention Pond Design Summary
Wet Pond Diagram
WET POND ID FOREBAY MAIN POND
WET POND 7 Permanent Pool El. 644 Permanent Pool El. 644
Temporary Pool El: 645.3 Temporary Pool El: 645.3
Pretreatment other No Clean Out Depth: 4 Clean Out Depth: 4
than forebay? Sediment Removal El: 640 Sediment Removal El: 640
Has Veg. Filter? Yes Bottom Elevation: 639.5 Bottom Elevation: 639.5
WET POND ID FOREBAY MAIN POND
WET POND 8 Permanent Pool El. 622 Permanent Pool El. 622
Temporary Pool El: 624 Temporary Pool El: 624
Pretreatment other No Clean Out Depth: 5 Clean Out Depth: 5
than forebay? Sediment Removal El: 617 Sediment Removal El: 617
Has Veg. Filter? Yes Bottom Elevation: 616.5 Bottom Elevation: 616.5
WET POND ID FOREBAY MAIN POND
WET POND 9 Permanent Pool El. 654 Permanent Pool El. 654
Temporary Pool El: 656 Temporary Pool El: 656
Pretreatment other No Clean Out Depth: 4 Clean Out Depth: 4
than forebay? Sediment Removal El: 650 Sediment Removal El: 650
Has Veg. Filter? Yes Bottom Elevation: 649.5 Bottom Elevation: 649.5
WET POND ID FOREBAY MAIN POND
WET POND 10 Permanent Pool El. 655 Permanent Pool El. 655
Temporary Pool El: 656.35 Temporary Pool El: 656.35
Pretreatment other No Clean Out Depth: 5 Clean Out Depth: 5
than forebay? Sediment Removal El: 650 Sediment Removal El: 650
Has Veg. Filter? Yes Bottom Elevation: 649.5 Bottom Elevation: 649.5
WET POND ID FOREBAY MAIN POND
WET POND 11 Permanent Pool El. 633 Permanent Pool El. 633
Temporary Pool El: 634.55 Temporary Pool El: 634.55
Pretreatment other No Clean Out Depth: 5 Clean Out Depth: 5
than forebay? Sediment Removal El: 628 Sediment Removal El: 628
Has Veg. Filter? Yes Bottom Elevation: 627.5 Bottom Elevation: 627.5
WET POND ID FOREBAY MAIN POND
WET POND 12 Permanent Pool El. 614 Permanent Pool El. 614
Temporary Pool El: 615.75 Temporary Pool El: 615.75
Pretreatment other No Clean Out Depth: 5 Clean Out Depth: 5
than forebay? Sediment Removal El: 609 Sediment Removal El: 609
Has Veg. Filter? Yes Bottom Elevation: 608.5 Bottom Elevation: 608.5
STORM-EZ 6/23/2023
Version 1.4 O&M Manual Page 4 of 4