SW6230104_O&M Agreement/Plan_20230126 (2)

Operation & Maintenance Agreement
Project Name:
Project Location:
Dunn, NC - Petco
Dunn, 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 & co
Infiltration Basin Quantity:
Infiltration Trench Quantity:
Bioretention Cell Quantity:
Wet Pond
Stormwater Wetland
Permeable Pavement
Sand Filter
Rainwater Harvesting
Green Roof
Level Spreader - Filter Strip
Proprietary System
Treatment Swale
Dry Pond
Disconnected Impervious Surface
User Defined SCM
Low Density
Quantity:
Quantity:
Quantity:
Quantity:
Quantity:
Quantity:
Quantity:
Quantity:
Quantity:
Quantity:
Present:
Present:
Present:
rresaondir
g O&M sheets 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):
Type:
De aaaea automaucai
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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:
Title & Organization:
Street address:
City, state, zip:
Phone number(s):
Email:
Signature:
County of
personally appeared before me this
Gabriel Martinez
PC-DUNN, NC-1-UT,LLC
4747 Williams Drive
Georgetown, TX 78633
512.819.4767
[e-mail]
, a Notary Public for the State of
, do hereby certify that
day of
acknowledge the due execution of the Operations and Maintenance Agreement .
Witness my hand and official seal,
Date:
and
Seal
STORM-EZ
Version 1.5
My commission expires
O&M Agreement
8/9/2022
Page 1 of 1

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 ce
- Heavy equipment will NEVER be driven over the bioretention cell.
- Special care will be taken to prevent sediment from entering the bioretention cell.
- Once a year, a soil test of the soil media will be conducted.
Remove top layer of fill media when the pool does not drain quickly. Based on the
media specification, the pool should drain within 24 hours.
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
rariiiaozf
ection activities shall be performed as follows. Any problems that are found shall be repaired immediately.
SCM element:
Potential problem:
How to remediate the problem:
The entire
bioretention cell
Trash/debris is
present.
Remove the trash/debris.
bioretention cellll The perimeter the
Areas of bare soil
and/or erosive gullies
have formed.
Regrade the soil if necessary to remove the gully,
plant ground cover and water until it is established.
Provide lime and a one-time fertilizer application.
The flow diversion
structure (if
The structure is
Make any necessary repairs or replace if the damage
applicable)
damaged.
is too much for repair.
The inlet pipe is
Unclog the pipe and dispose of any sediment in a
clogged (if
location where it will not cause impacts to streams or
cracked or otherwise
damaged (if
Repair or replace the pipe.
The inlet device
Erosion is occurring in
Regrade the swale if necessary and provide erosion
the swale (if
control devices such as reinforced turf matting or
applicable).
riprap to avoid future erosion problems.
clogged or covered in
Remove sediment and clogged stone and replace
sediment (if
with clean stone.
Flow is bypassing
pretreatment area
and/or gullies have
Regrade if necessary to route all flow to the
pretreatment area. Restabilize the area after grading.
Sediment as
bearch for the source ot the sediment and remedy the
accumulated to a
problem if possible. Remove the sediment and
The pretreatment
depth greater than
dispose of it in a location where it will not cause
area
three inches.
impacts to streams or the SCM.
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 spraying.

Bioretention Maintenance Requirements (continued)
SCM element:
Potential problem:
How to remediate the problem:
Best professional
practices show that
Prune according to best professional practices.
pruning is needed to
Maintain lines of sight between 2'-6'.
maintain optimal
plant health.
Determine the source of the problem: soils,
hydrology, disease, etc. Remedy the problem and
Bioretention cell
Plants are dead,
replace plants. Provide a one-time fertilizer
vegetation
diseased or dying.
application to establish the ground cover if a soil test
indicates it is necessary. If sod was used, check to see
that it was not grown on clay or impermeable soils.
Remove the weeds, preferably by hand. If pesticide is
Weeds are present.
used, wipe it on the plants rather than spraying.
Tree stakes/wires are
Remove tree stake/wires (which can kill the tree if not
present six months
removed).
after planting.
Spot mulch if there are only random void areas.
Mulch is breaking
Replace whole mulch layer if necessary. Remove the
down or has floated
remaining mulch and replace with triple shredded
away.
hard wood mulch at a maximum depth of four inches.
Determine the extent of the clogging - remove and
replace either just the top layers or the entire media
Soils and/or mulch are
Bioretention cell
clogged with
as needed. Dispose of the spoil in an appropriate off -
mulch and media
sediment.
site location. Use triple shredded hard wood mulch at
a maximum depth of four inches. Search for the
source of the sediment and remedy the problem if
An annual soil test
shows that pH has
Dolomitic lime shall be applied as recommended per
dropped or heavy
the soil test and toxic soils shall be removed, disposed
metals have
of properly and replaced with new planting media.
accumulated in the
Wash out the underdrain system.
The underdrain,filter
Clogging has
Clean out the drop inlet. Dispose of the sediment in a
fabric elementent,, and
outlet system
occurred.
location where it will not cause impacts to streams or
Repair or replace the drop inlet.
Erosion or other signs
Repair the damage and improve the flow dissipation
of damage have
structure.
occurred at the outlet.
The receiving water
Discharges from the
bioretention cell are
causing erosion or
Contact the local NCDEQ Regional Office.
sedimentation in the
receiving water.