SW3130501_Ladera HOA O&M Forms_Signed 2020-07-08_20200713

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
Wet Detention Basin Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will 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 removal efficiency of the BMP.
The wet detention basin system is defined as the wet detention basin,
pretreatment including forebays and the vegetated filter if one is provided.
This system (check one):
® does ❑ does not incorporate a vegetated filter at the outlet.
This system (check one):
❑ does ® does not incorporate pretreatment other than a forebay.
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 theproblem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the
wet detention basin
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
I aDproximately six inches.
Form SW401-Wet Detention Basin O&M-Rev.4 Page 1 of 4

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
BMP element:
The inlet device: pipe
or swale
Potentialproblem:
The pipe is clogged.
How I will remediate the roblem:
Unclog the pipe. Dispose of the
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Erosion is occurring in the
swale.
Regrade the swale if necessary to
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid future
problems with erosion.
The forebay
Sediment has accumulated to
a depth greater than the
original design depth for
sediment storage.
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
will not cause impacts to streams or
the BMP.
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
show that pruning is needed
Prune according to best
professional practices
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.
The main treatment
area
Sediment has accumulated to
a depth greater than the
original design sediment
storage depth.
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
will not cause impacts to streams or
the BMP.
Algal growth covers over 50%
of the area.
Consult a professional to remove
and control the algal growth.
Cattails, phragmites or other
invasive plants cover 50% of
Remove the plants by wiping them
with pesticide (do not spray).
the basin surface.
Form SW401-Wet Detention Basin O&M-Rev.4 Page 2 of 4

Permit Number:
(to be provided by DWQ)
Drainave Area Number:
BMP element:
Potentialproblem:
How I will remediate theproblem:
The embankment
Shrubs have started to grow
Remove shrubs immediately.
on the embankment.
Evidence of muskrat or
Use traps to remove muskrats and
beaver activity is present.
consult a professional to remove
beavers.
A tree has started to grow on
Consult a dam safety specialist to
the embankment.
remove the tree.
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
damage have occurred at the
Contact the local NC Division of
Water Quality Regional Office, or
outlet.
the 401 Oversight Unit at 919-733-
1786.
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.
When the permanent pool depth reads 4.00 feet in the main pond, the
sediment shall be removed.
When the permanent pool depth reads 4.00 feet in the forebay, the sediment
shall be removed.
Sediment Removal E� 625.00
BASIN DIAGRAM
ill in the blanks)
Permanent Pool Elevation
Volume\ Sediment Removal Elevation 625.00
Bottom Elevation -ft Min. \
Sediment Bottom Elevation 624.00
1-ft Min.
Storage
Sediment
Storage
FOREBAY MAIN POND
Form SW401-Wet Detention Basin O&M-Rev.4 Page 3 of 4

Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Project name: Ladera Subdivision
BMP drainage area number:
Print name: Kristen Fields
Title: Community Associate
Address: P.O. Box 2664
Signature:
Date: ­1
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
, -�'A �, � )t k ; , a Notary Public for the State of
r- , County of XNe `,� .&jbg N do hereby certify that
personally appeared before me this K!
day of ��. - , gL�,-41Dand acknowledge the due execution of the
forgoing wet detention basin maintenance requirements. Witness my hand and official
seal, , � C.
SEAL
My commission expires �21nb) A N
Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
Filter Strip, Restored Riparian Buffer and Level Spreader
Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will 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 removal efficiency of the BMP.
Important maintenance procedures:
— Immediately after the filter strip is established, any newly planted vegetation will
be watered twice weekly if needed until the plants become established
(commonly six weeks).
— Once a year, the filter strip will be reseeded to maintain a dense growth of
vegetation
— Stable groundcover will be maintained in the drainage area to reduce the
sediment load to the vegetation.
— Two to three times a year, grass filter strips will be mowed and the clippings
harvested to promote the growth of thick vegetation with optimum pollutant
removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and
may be allowed to grow as tall as 12 inches depending on aesthetic
requirements (NIPC, 1993). Forested filter strips do not require this type of
maintenance.
— Once a year, the soil will be aerated if necessary.
— Once a year, soil pH will be tested and lime will be added if necessary.
After the filter strip is established, it will be inspected quarterly and within 24 hours
after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County).
Records of operation and maintenance will be kept in a known set location and will be
available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall be
repaired immediately.
BMP element:
Potentialproblem:
How I will remediate theproblem:
The entire filter strip
Trash/debris is present.
Remove the trash/debris.
system
The flow splitter device
(if applicable)
The flow splitter device is
clogged.
Unclog the conveyance and dispose
of any sediment off -site.
The flow splitter device is
damaged.
Make any necessary repairs or
replace if damage is too large for
repair.
Form SA U401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 1 of 3

BMP element:
Potentialproblem:
How I will remediate theproblem:
The swale and the level
The swale is clogged with
Remove the sediment and dispose
lip
sediment.
of it off -site.
The level lip is cracked,
Repair or replace lip.
settled, undercut, eroded or
otherwise damaged.
There is erosion around the
Regrade the soil to create a berm
end of the level spreader that
that is higher than the level lip, and
shows stormwater has
then plant a ground cover and water
bypassed it.
until it is established. Provide lime
and a one-time fertilizer application.
Trees or shrubs have begun
Remove them.
to grow on the swale or just
downslo a of the level lip.
The bypass channel
Areas of bare soil and/or
erosive gullies have formed.
Regrade the soil if necessary to
remove the gully, and then
reestablish proper erosion control.
Turf reinforcement is
Study the site to see if a larger
damaged or ripap is rolling
downhill.
bypass channel is needed (enlarge
if necessary). After this, reestablish
the erosion control material.
The filter strip
Grass is too short or too long
if applicable).
Maintain grass at a height of
approximately three to six inches.
Areas of bare soil and/or
Regrade the soil if necessary to
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Sediment is building up on
Remove the sediment and
the filter strip.
restabilize the soil with vegetation if
necessary. Provide lime and a one-
time fertilizer application.
Plants are desiccated.
Provide additional irrigation and
fertilizer as needed.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application.
Nuisance vegetation is
Remove vegetation by hand if
choking out desirable
species.
possible. If pesticide is used, do not
allow it to get into the receiving
water.
The receiving water
Erosion or other signs of
damage have occurred at the
outlet.
Contact the NC Division of Water
Quality local Regional Office, or the
401 Oversight Unit at 919-733-1786.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 2 of 3

Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Project name: Ladera Subdivision
BMP drainage area number: 1B
Print name: Kristen Fields
Title: Community Associate
Address: P.O. Box 2664
Phone: [phone]
Signature:
Date:
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
QA, , a Notary Public for the State of
County of �L o. `6 \ �,Jpot-� , do hereby certify that
$ personally appeared before me this
day of , > and acknowledge the due execution of the
inn filte=trip, ri arian buffer, and/or level spreader maintenance requirements.
forgo g p
Witness my hand and official seal, L> ' Q_
..... 1.1"""
Whise
DiARy'��,
A C.
UB L�
- Aef7bur9
SEAL
My commission expires lUa.1
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 3 of 3

Pen -nit Number:
(to be provided by DWQ)
Drainage Area Number:
Sand Filter Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will 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
removal efficiency of the BMP.
Important maintenance procedures:
— The drainage area will be carefully managed to reduce the sediment load to the sand filter.
— The sedimentation chamber or forebay will be cleaned out whenever sediment depth exceeds
six inches.
— Once a year, sand media will be skimmed.
— The sand filter media will be replaced whenever it fails to function properly after maintenance.
The sand filter 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 will be kept
in a known set location and will be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall be repaired
immediately.
BMP element: Potentialproblem: How I will remedia_te the problem:
Entire BMP Trash/debris is present. Remove the trash/debris.
Adjacent pavement (if Sediment is present on the Sweep or vacuum the sediment as soon
applicable) avement surface. as possible.
Perimeter of sand filter Areas of bare soil and/or erosive Regrade the soil if necessary to remove
gullies have formed. the gully, and then plant a ground cover
and water until it is established. Provide
lime and a one-time fertilizer a lication.
Vegetation is too short or too long. Maintain vegetation at an appropriate
height.
Flow diversion structure The structure is clogged. Unclog the conveyance and dispose of
an sediment offsite.
The structure is damaged. Make any necessary repairs or replace if
damage is too large for repair.
Forebay or pretreatment Sediment has accumulated to a Search for the source of the sediment and
area depth of greater than six inches. remedy the problem if possible. Remove
the sediment and stabilize or dispose of it
in a location where it will not cause
impacts to streams or the BMP.
Erosion has occurred. Provide additional erosion protection such
as reinforced turf matting or riprap if
needed to prevent future erosion
roblems.
Weeds are present. Remove the weeds, preferably by hand. If
a pesticide is used, wipe it on the plants
rather than spraying.
BMP element: Potentialproblem: How I will remediate theproblem:
Filter —bed and underdrain Water is ponding on the surface for Check to see if the collector system is
collection system more than 24 hours after a storm. clogged and flush if necessary. If water
Form SW401-Sand Filter O&M-Rev.4 2009Sept17 Page 1 of 3

still ponds, remove the top few inches of
filter bed media and replace. If water still
onds, then consult an expert.
Outlet device
Clogging has occurred.
Clean out the outlet device. Dispose of
the sediment offsite.
The outlet device is damaged
Repair or replace the outlet device.
Receiving water
Erosion or other signs of damage
have occurred at the outlet.
Contact the NC Division of Water Quality
1 401 Oversight Unit at 919-733-1786.
Form SW401-Sand Filter O&M-Rev.4 2009Septl7 Page 2 of 3

Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the performance of the
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior
to any changes to the system or responsible party.
Project name: Ladera Subdivision
BMP drainage area number: 2
Print name: Kristen Fields
Title: Communily Associate
Address: P.O. Box 2664
Phone:
Signature:
Date:
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been
sold and a resident of the subdivision has been named the president.
a Notary Public for the State of
�1 � ,County of , do hereby certify thaA
persona ly appeared before me this day of
and acknowledge the due execution of the forgoing sand filter
maintenance requirements. Witness my hand and official seal, /'�o JbvVI\ C_
A R y
PUBS-�
'�., enbuc9
SEAL
My commission expires,ot�
Form SW401-Sand Filter O&M-Rev.4 2009Sept17 Page 3 of 3

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
Sand Filter Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will 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
removal efficiency of the BMP.
Important maintenance procedures:
— The drainage area will be carefully managed to reduce the sediment load to the sand filter.
— The sedimentation chamber or forebay will be cleaned out whenever sediment depth exceeds
six inches.
— Once a year, sand media will be skimmed.
— The sand filter media will be replaced whenever it fails to function properly after maintenance.
The sand filter 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 will be kept
in a known set location and will be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall be repaired
immediately.
BMP element: Potentialproblem: How I will remediate theproblem:
_
Entire BMP Trash/debris is present. Remove the trash/debris.
Adjacent pavement (if
applicable)
Sediment is present on the
pavement surface.
Sweep or vacuum the sediment as soon
as possible.
Perimeter of sand filter
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 an appropriate
height.
Flow diversion structure
The structure is clogged.
Unclog the conveyance and dispose of
any sediment offsite.
The structure is damaged.
Make any necessary repairs or replace if
damage is too large for repair.
Forebay or pretreatment
area
Sediment has accumulated to a
depth of greater than six inches.
Search for the source of the sediment and
remedy the problem if possible. Remove
the sediment and stabilize or dispose of it
in a location where it will not cause
impacts to streams or the BMP.
Erosion has occurred.
Provide additional erosion protection such
as reinforced turf matting or riprap if
needed to prevent future erosion
roblems.
Weeds are present.
Remove the weeds, preferably by hand. If
a pesticide is used, wipe it on the plants
rather than spraying.
BMP element:
Potentialproblem:
How I will remediate theproblem:
Filter bed and underdrain
collection system
Water is ponding on the surface for
more than 24 hours after a storm.
Check to see if the collector system is
clogged and flush if necessary. If water
Form SW401-Sand Filter O&M-Rev.4 2009Sept17 Page 1 of 3

still ponds, remove the top few inches of
filter bed media and replace. If water still
ponds, then consult an expert.
Outlet device
Clogging has occurred.
Clean out the outlet device. Dispose of
the sediment offsite.
The outlet device is damaged
Repair or replace the outlet device.
Receiving water
Erosion or other signs of damage
have occurred at the outlet.
Contact the NC Division of Water Quality
1 401 Oversight Unit at 919-733-1786.
Form SW401-Sand Filter O&M-Rev.4 2009Sept17 Page 2 of 3

Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the performance of the
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior
to any changes to the system or responsible party.
Project name: Ladera Subdivision
BMP drainage area number: 4
Print name: Kristen Fields
Title: Community Associate
Address: P.O. Box 2664
Phone: 7
Date:
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been
sold and a resident of the subdivision has been named the president.
, C `I� , a Notary Public for the State of
hI
County of , do hereby certify that
personal appeared before me this _A_ day of
and acknowledge the due execution of the forgoing sand filter
maintenance requirements. Witness my hand and official seal, 'Z', �' e. U_k4l-(3^
rrrprrrr,'',
Wh;.
oTpR ,?r
- r
r -
r =
pOB LAC ;
SEAL
My commission expires' \aaa�'�
Form SW401-Sand Filter O&M-Rev.4 2009Sept17 Page 3 of 3

Permit Number:
(to be provided by DWQ
Drainage Area Number:
Sand Filter Operation and Maintenance Agreement
will keep a maintenance record on this BMP. This maintenance record will 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
removal efficiency of the BMP.
Important maintenance procedures:
— The drainage area will be carefully managed to reduce the sediment load to the sand filter.
— The sedimentation chamber or forebay will be cleaned out whenever sediment depth exceeds
six inches.
— Once a year, sand media will be skimmed.
— The sand filter media will be replaced whenever it fails to function properly after maintenance.
The sand filter 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 will be kept
in a known set location and will be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall be repaired
immediately.
BMP element:
Entire BMP
Adjacent pavement (if
applicable)
Perimeter of sand filter
Flow diversion structure
Forebay or pretreatment
area
Trash/debris is present.
Sediment is present on the
pavement surface.
Areas of bare soil and/or erosive
gullies have formed.
Vegetation is too short or too long
The structure is clogged.
The structure is damaged.
Sediment has accumulated to a
depth of greater than six inches.
Erosion has occurred.
Weeds are present.
How I will remediate the
Remove the trash/debris.
Sweep or vacuum the sediment as soon
as possible.
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.
Maintain vegetation at an appropriate
height.
Unclog the conveyance and dispose of
any sediment offsite.
Make any necessary repairs or replace if
damage is too large for repair.
Search for the source of the sediment and
remedy the problem if possible. Remove
the sediment and stabilize or dispose of it
in a location where it will not cause
impacts to streams or the BMP.
Provide additional erosion protection such
as reinforced turf matting or riprap if
needed to prevent future erosion
problems.
Remove the weeds, preferably by hand. If
a pesticide is used, wipe it on the plants
rather than spraying.
BMP element: Potentialproblem: How I will remediate theproblem:
Filter bed and underdrain Water is ponding on the surface for Check to see if the collector system is
collection system more than 24 hours after a storm. clogged and flush if necessary. If water
Form SW401-Sand Filter O&M-Rev.4 2009Sept17 Page 1 of 3

still ponds, remove the top few inches of
filter bed media and replace. If water still
ponds, then consult an expert.
Outlet device
Clogging has occurred.
Clean out the outlet device. Dispose of
the sediment offsite.
The outlet device is damaged
Repair or replace the outlet device.
Receiving water
Erosion or other signs of damage
have occurred at the outlet.
Contact the NC Division of Water Quality
401 Oversight Unit at 919-733-1786.
Form SW401-Sand Filter O&M-Rev.4 2009Sept17 Page 2 of 3

Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the performance of the
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior
to any changes to the system or responsible party.
Project name: Ladera Subdivision
BMP drainage area number:
Print name: Kristen Fields
Title: Communes Associate
Address: P.O. Box 2664
Phone: [phone]
Signature:
Date:
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been
sold and a resident of the subdivision has been named the president.
I,
5; , a Notary Public for the State of
,County of \ , do hereby certify that
e N �Te S _ personall peared before me this � day of
and acknowledge the due execution of the forgoing sand filter
maintenance requirements. Witness m hand and official seal G
q Y
SEAL
My commission expires gZa a \
Form SW401-Sand Filter O&M-Rev.4 2009Sept17 Page 3 of 3