SW6240902_O&M Agreement/Plan_20241023

Operation & Maintenance Agreement
Project Name: Sanctuary Subdivision
Project Location: Daydream Crossing, Harnett County, 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&corresponding O&M sheets will be added automatically):
Infiltration Basin Quantity: Location(s):
Infiltration Trench Quantity: Location(s):
Bioretention Cell Quantity: Location(s):
Wet Pond Quantity: 2 Location(s): NW and SE Corner of Property
Stormwater Wetland Quantity: Location(s):
Permeable Pavement Quantity:_ Location(s):
Sand Filter Quantity: 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:
..LICK TO UPDATE O&M MANUAL
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: GFC Sanctuary, LLC/Yang Song
Title &Organization: Manager
Street address: 8601 Six Forks Road, Suite 270
City, state, zip: Raleighm NC 27615
Phone number(s): 919-418-9042
Email: [e-mail]
Signature: - Date: 0 9703 72-2..it
I. -SV' %VIVA Sat- , a Notary Public for the State of IV61WTrf CPPYZCL lvt4
County of W RIcC , do hereby certify that 1?IkN Fi S!SV1 (--k
personally appeared before me this T'V day of Stf2At 6eAr 2021-( and
acknowledge the due execution of the O erations and Maintenance Agreement
t
Witness�a►y F 1ike_o�itle ,official seal, I & A161.4-G.
t 1,e .o issio�• 149\
r • 4OTA/�y QN
j%8L1G i if
I.� �• if., 19 ./VAS
Co .'�
Seal My commission expires S i I S IS,j7.41
STORM-EZ 8/29/2024
Version 1.5 O&M Agreement Page 1 of 1

Wet Pond Maintenance Requirements
Important operation and maintenance proce
Immediately after the wet detention basin is established, the plantson 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 groundcoverwill 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
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
/-NILCI IIIC WCl pUIIC] iD CSIdUIIS ICU II Will UC IIIS�7C(�ICU l.�Udlleily dllU WIL11111 T+ IIUUIS liter 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
fact
:ion activities shall be performed as follows. Any problemsthat are found shall be repaired immel
SCM element: Potential problem: How to remediate the problem:
The entire wet pond n�Qain}`uli'" Remove the trash/debris.
Areas of bare soil Regrade the soil if necessary to remove the gully,
The perimeter of the and/or erosive gullies plant ground cover and water until it is established
wet pond
have formed. Provide lime and a one-time fertilizer application.
The inlet pipe is
clogged (if Unclog the pipe. Dispose of the sediment off-site
I ll iiiiCL jJI la
cracked or otherwise
The inlet dev ice damaged (if
Repair or replace the pipe
annlirohlol
Erosion is occurring Regrade the swale if necessary and provide erosion
in the swale (if control devices such as reinforced turF matting or
applicable). riprap to avoid future problems with erosion.
Sediment has Search for the source of the sediment and remedy
accumulated to a the problem if possible. Remove the sediment and
depth greater than dispose of it in a location where it will not cause
the original design impacts to streams or the SCM.
The forebay depth for sediment
Provide additional erosion protection such as
Erosion has occurred 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

Wet Pond Maintenance Requirements (Continued)
SCM element: Potential problem: How to remediate the problem:
Sediment has
Search for the source of the sediment and remedy
accumulated to a the problem if possible. Remove the sediment and
depth greater than
dispose of it in a location where it will not cause
the original design impacts to streams or the SCM.
The main treatment sediment storaae
area Algal growth covers Consult a professional to remove and control the
over 50% of the algal growth
Cattails, phragmites
or other invasive Remove the plants by wiping them with pesticide
plants cover 50% of (do not spray).
the basin surface.
Best professional
practices show that
pruning is needed to Prune according to best professional practices
maintain optimal
,plant health.
The vegetated shelf Determine the source of the problem: soils,
Plants are dead, hydrology, disease, etc. Remedy the problem and
diseased or dying replace plants. Provide a one-time fertilizer
application to establish the ground cover if a soil
Weeds are present. Remove the weeds, preferably by hand. If
pesticide is used, wipe it on the plants rather than
Shrubs have started
to grow on the Remove shrubs immediately
embankment.
Evidence of muskrat Consult a professional to remove muskrats or
or beaver activity is beavers and repair any holes or erosion
The embankment A tree has started to
grow on the Consult a dam safety specialist to remove the tree
An annual inspection
by an appropriate
professional shows Make all needed repairs immediately
that the embankment
needs repair.
Clo in has Clean out the outlet device and dispose of any
gg g sediment in a location where it will not cause
The outlet device occurred. impacts to streams or the SCM.
The outlet device is
damaged. Repair or replace the outlet device
Weeds or volunteer
trees are growing on Remove the weeds or trees
Floating wetland i !It dnt,irui Lduie iS
island (if applicable) damaged,
disconnected or Restore the anchor cable to its design state.
miccinn

Wet Pond Maintenance Requirements (Continued)
SCM element: Potential problem: How to remediate the problem:
LIU Uil VI IJ IIICI JI IJ.IiA
of damage have Repair the damage and improve the flow
occurred at the dissipation structure.
niiflof
The receiving water Discharges from the
wet pond are causing
erosion or Contact the local NCDEQ Regional Office.
sedimentation in the
receivina water
Wet Detention Pond Design Summary
Wet Pond Diagram
WET POND ID FOREBAY MAIN POND
1 Permanent Pool El. 350.5 Permanent Pool El. 350.5
Temporary Pool El: 352 Temporary Pool El: 352
Pretreatment No Clean Out Depth: 4 Clean Out Depth: 5
other than Sediment Removal E 346.5 Sediment Removal E 345.5
Has Veg.Filter? No Bottom Elevation: 345.5 _ Bottom Elevation: 344.5
ATTACH ADDITIONAL SHEETS IF NECESSARY

Wet Pond Maintenance Requirements
Important operation and maintenance proce
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 groundcoverwill 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
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
/11tCt Lne 9Vl:l pullU ISeStdUliSIICU, IL Will UC InSpCC,LeU quaflerry dilu WiuhllI Li} rlOUWS alter 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
ranuocf
:ion activities shall be performed as follows. Any problems that are found shall be repaired immel
SCM element: Potential problem: How to remediate the problem:
I I W I/UCUIIS IS
The entire wet pond .,r, ,+ Remove the trash/debris.
Areas of bare soil Regrade the soil if necessary to remove the gully,
The perimeter of the
wet pond and/or erosive gullies plant ground cover and water until it is established.
have formed. Provide lime and a one-time fertilizer application
The inlet pipe is
clogged (if Unclog the pipe. Dispose of the sediment off-site
i II Wit!. pipe IS
cracked or otherwise
The inlet device damaged (if Repair or replace the pipe.
annlir-�hI \
Erosion is occurring Regrade the swale if necessary and provide erosion
in the swale (if control devices such as reinforced turf matting or
applicable). riprap to avoid future problems with erosion.
Sediment has Search for the source of the sediment and remedy
accumulated to a the problem if possible. Remove the sediment and
depth greater than dispose of it in a location where it will not cause
the original design impacts to streams or the SCM.
The forebay depth for sediment
Provide additional erosion protection such as
Erosion has occurred 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

Wet Pond Maintenance Requirements (Continued)
SCM element: Potential problem: How to remediate the problem:
Sediment has Search for the source of the sediment and remedy
accumulated to a the problem if possible. Remove the sediment and
depth greater than dispose of it in a location where it will not cause
the original design impacts to streams or the SCM.
The main treatment sediment storage
area Algal growth covers Consult a professional to remove and control the
over 50% of the algal growth.
Cattails, phragmites
or other invasive Remove the plants by wiping them with pesticide
plants cover 50% of (do not spray).
the basin surface.
Best professional
practices show that
pruning is needed to Prune according to best professional practices.
maintain optimal
plant health.
The vegetated shelf Determine the source of the problem: soils,
Plants are dead, hydrology, disease, etc. Remedy the problem and
diseased or dying replace plants. Provide a one-time fertilizer
application to establish the ground cover if a soil
Weeds are present. Remove the weeds, preferably by hand. If
pesticide is used, wipe it on the plants rather than
Shrubs have started
to grow on the Remove shrubs immediately
embankment.
Evidence of muskrat Consult a professional to remove muskrats or
or beaver activity is beavers and repair any holes or erosion,
The embankment A tree has started to
grow on the Consult a dam safety specialist to remove the tree,
An annual inspection
by an appropriate
professional shows Male all needed repairs immediately,
that the embankment
needs repair.
Clogging has Clean out the outlet device and dispose of any
occurred. sediment in a location where it will not cause
The outlet dev ice impacts to streams or the SCM
The outlet device is
damaged. Repair or replace the outlet device.
Weeds or volunteer
trees are growing on Remove the weeds or trees.
Floating wetland ne anLnui UdIJIC is
island (if applicable) damaged,
disconnected or Restore the anchor cable to its design state
micci nn

Wet Pond Maintenance Requirements (Continued)
SCM element: Potential problem: How to remediate the problem:
CIUNUII Ur UuFUi b1l�.lIS
of damage have Repair the damage and improve the flow
occurred at the dissipation structure.
niitlAt
The receiving water Discharges from the
wet pond are causing
erosion or Contact the local NCDEQ Regional Office
sedimentation in the
receiving water.
Wet Detention Pond Design Summary
Wet Pond Diagram
WET POND ID FOREBAY MAIN POND
2 Permanent Pool El. 371.5 Permanent Pool El 371.5
Temporary Pool El: 373 Temporary Pool El 373
Pretreatment No Clean Out Depth: 2.5 Clean Out Depth: 4.5
other than Sediment Removal E 369 Sediment Removal E 367
Has Veg Filter? No Bottom Elevation: 368 Bottom Elevation: 366
ATTACH ADDITIONAL SHEETS IF NECESSARY