20061804 Ver 12_Woodlands Signed O&M Agreement_20161216

Operation & Maintenance Agreement
Project Name:
Project Location:
Woodlands @ Flowers Plantation (Pod NE -6)
Flowers Plantation, Clayton, NC
e
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 immediately. 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 & correspc
Bioretention Cell
Quantity:
1
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:
1
Disconnected Impervious Area
Present: I
No
User Defined BMP
Present:
No
O&M tables will
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):
De aaaea automaticaii :
Behind Lots 25-32
(Behind Lots 10-22 1
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
arty:Title & Organization:
Street address:
City, state, zip:
Phone number(s):
Email -
Edwin Woods
Vice President, Dan Ryan Builders NC, LLC
3131 RDU Center Drive, Suite 120
Morrisville, NC 27560
252) 747-4970
[e-mail]
Signature: / Date:
1, a Notary Public for the State of
County of C�,�(,Q do Nearby certify that
persona y appeared before me this �(Q day of�I 41(.0 and
acknowledge the due execution of the Oper ions a d Maintn ce reement .
Witness wJa>a d)apg official seal, VOUJI
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woke Crunty lyes~
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Seal STORM -EZ My commission expires 9/2/2016
Version 14 U&M 101anual Page 1 of 7

STORM -EZ 902016
Version 1.4 O&M Manua! Page 2 of 7

Bioretention Maintenance Requirements
Important operation and maintenance procedures:
- Immediately after the bioretention cell is established, the plants will be watered twice weekly if needed until the plants
become established (commonly six weeks).
- Snow, mulch or any other material will NEVER be piled on the surface of the bioretention cell.
- Wheeled or tracked equipment will NEVER be driven over the bioretention planting surface.
- Special care will be taken to prevent sediment from entering the bioretention cell.
- If standing water is present 2 days after rainfall, conduct an infiltration test of the soil media.
After the bioretention cell is established, inspect it quarterly. Inspection activities shall be performed as follows and maintenance
activites shall commence immediately to remediate any problems observed per the table below.
BMP element:
Potential problem:
How to 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
erosive gullies have formed.
Regrade the soil to remove the gully, and plant a ground cover and
water until it is established. Provide lime and a one-time fertilizer
application.
Vegetation is too short or too
long.
Maintain vegetation at a height of approximately six inches.
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 to smooth it over and provide erosion control
swale.
devices such as reinforced turf matting or riprap to avoid future
problems.
Stone verge is clogged or
Remove sediment and replace with clean stone.
covered in sediment (if
applicable).
The pretreatment area
Flow is bypassing
Regrade if necessary to route all flow to the pretreatment area.
pretreatment area and/or
Restabilize the area after grading.
gullies have formed.
Sediment has accumulated to
a depth greater than three
inches.
Search for the source of the sediment and remedy the problem if
possible. Remove the sediment and restabilize the pretreatment area.
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.
The bioretention cell:
Best professional practices
Prune according to best professional practices.
vegetation
show that pruning is needed
to maintain optimal plant
health.
Plants are dead, diseased or
dying.
Determine the source of the problem: soils, hydrology, disease, etc.
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.
Tree stakes/wires are present
six months after planting.
Remove tree staketwires (which can kill the tree if not removed).
STORM -EZ 9/2/2016
Version 1.4 O&M Manual Page 3 of 7

Bioretention Maintenance R2gulrements (continued)
BMP element:
Potential problem:
How to remediate the problem:
The bioretention cell:
soils and mulch
Mulch is breaking down or
has floated away.
Spot mulch if there are only random void areas. Replace whole mulch
layer if necessary. Remove the remaining much and replace with
triple shredded hard wood mulch at a maximum depth of three inches.
Soils and/or mulch are
clogged with sediment.
Determine the extent of the clogging - remove and replace either just
the top layers or the entire media as needed. Dispose of the spoil in
an appropriate off-site location. Use triple shredded hard wood mulch
at a maximum depth of three inches. Search for the source of the
sediment and remedy the problem if possible.
An annual soil test shows that
Dolomitic lime shall be applied as recommended per the soil test and
pH has dropped or heavy
metals have accumulated in
toxic soils shall be removed, disposed of properly and replaced with
new planting media.
the soil media.
The underdrain system
Clogging has occurred.
Wash out the underdrain system.
(if applicable)
The drop inlet
Clogging has occurred.
Clean out the drop inlet. Dispose of the sediment off-site.
The drop inlet is damaged
Repair or replace the drop inlet.
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 9/2/2016
Version 1.4 0&M Manual Page 4 of 7

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
erosive gullies have formed.
Regrade the soil if necessary to remove the gully, and then plant a
ground cover and water until it is established. Provide lime and a one-
time fertilizer application.
Vegetation is too short or too
long_
Maintain vegetation at a height of approximately six inches.
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
swaie,
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
a depth greater than the
Search for the source of the sediment and remedy the problem if
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
dying.
Determine the source of the problem: soils, hydrology, disease, etc.
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.
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Version 1.4 08M Manual Page 5 of 7

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.
The embankment
Shrubs have started to grow
Remove shrubs immediately.
on the embankment.
Evidence of muskrat or
Use traps to remove muskrats and consult a professional to remove
beaver 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 9/2/2016
Version 1.4 0&M Manual Page 6 of 7

Wet Detention Pond resign Summary'
P,o n d l .m ..,,
WET POND ID FOREBAY
1
Permanent Pool EI
2395
MAIN POND
Perrnanent Pool EI.
239.5
Temporary Pool El
240.5
Temporary Pool EI
240.5
Pretreatment other No
Clean Out Depth
4.5
Clean Out Depth.
4.5
than forebay?
Sediment Removal EI-
235
Sediment Removal El:
235
Has Veg. Filter? No
Bottom Elevation,
234
Bottom Elevation
232
STORM -EZ 912/2016
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