SW3240502_O&M Agreement/Plan_20240606 (5)

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
Infiltration 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.
Important maintenance procedures:
— The drainage area will be carefully managed to reduce the sediment load to the
infiltration basin.
— Immediately after the infiltration basin is established, the vegetation will be
watered twice weekly if needed until the plants become established (commonly
six weeks).
— No portion of the infiltration basin will be fertilized after the initial fertilization
that is required to establish the vegetation.
— The vegetation in and around the basin will be maintained at a height of
approximately six inches.
After the infiltration basin is established,it will be inspected once a quarter 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: Potential problem: How I will remediate the problem:
The entire BMP Trash/debris is present. Remove the trash/debris.
The perimeter of the Areas of bare soil and/or Regrade the soil if necessary to
infiltration basin 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.
The inlet device: pipe or The pipe is clogged(if Unclog the pipe. Dispose of the
swale applicable). sediment off-site.
The pipe is cracked or Replace the pipe.
otherwise damaged(if
applicable).
Erosion is occurring in the Regrade the swale if necessary to
swale(if applicable). smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
Form SW401-Infiltration Basin O&M-Rev.3 Page 1 of 3

BMP element: Potential problem: How I will remediate the problem: _
The forebay Sediment has accumulated Search for the source of the
and reduced the depth to 75% sediment and remedy the problem if
of the original design depth. 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 or Provide additional erosion
riprap is displaced. 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 pesticides are used,wipe
them on the plants rather than
spraying.
The main treatment area A visible layer of sediment Search for the source of the
has accumulated. 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. Replace any media that
was removed in the process.
Revegetate disturbed areas
immediately.
Water is standing more than Replace the top few inches of filter
5 days after a storm event. media and see if this corrects the
standing water problem. If so,
revegetate immediately. If not,
consult an appropriate professional
for a more extensive repair.
Weeds and noxious plants are Remove the plants by hand or by
growing in the main wiping them with pesticide(do not
treatment area. spray).
The embankment Shrubs or trees have started Remove shrubs or trees
to grow on the embankment. immediately.
An annual inspection by an Make all needed repairs.
appropriate professional
shows that the embankment
needs repair.
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 NC Division of Water
damage have occurred at the Quality 401 Oversight Unit at 919-
outlet. 733-1786.
Form SW401-Infiltration Basin 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:Sage at Marvin
BMP drainage area number..Infiltration Basin 2 = Proposed Watershed 2A
Print name: 54 4k1ee.)4 Al.M//1/1--(/
Title: (Y /G12 ` M A-A14f e`er
Address: bYO/ C ( -avl6 (Z z$z z4
Phone: 70 y
Signatur .
Date: z z Z al-Y
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, �-#%I Pi78-- , a Notary Public for the State of
Nc Di) G2cU +v l- , County of u Nl a t►J , do hereby certify that
�PANDON rK/r-t,ua.. personally appeared before me this 2-2-
day of AP/Z.t L. , 707,4 , and acknowledge the due execution of the
forgoing infiltration basin maintenance require ►e//. Witness my hand and official seal,
omm.4 . may.
NOTARY
PUBLIC
SEAL
IJ
My commission expires . I .24'7 '
Form SW401-Infiltration Basin O&M-Rev.3 Page 3 of 3