SW6231202_O&M Agreement/Plan_20240321

v fJ I ALIV11 a 1111d111Le11dI1Ge agreement
Project Name: Dunn, NC - Petco
Project Location: Dunn, NC
Cover Page
aintenance records shall be kept on the following SCM(s). This maintenance record shall be kept in a log in a known set location.
iy deficient SCM elements noted in the inspection will be corrected, repaired, or replaced immediately. These deficiencies can
fed the integrity of structures, safety of the public, and the pollutant removal efficiency of the SCM(s).
le 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: 1 Location(s): NW corner of property
Wet Pond Quantity: Location(s):
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: 1 Location(s): N side of property
Dry Pond Quantity: Location(s):
Disconnected Impervious Surface Present: No Location(s):
User Defined SCM Present: No Location(s):
Low Density Present: No Type:
acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed for
ach SCM above, and attached O&M tables. I agree to notify NCDEQ of any problems with the system or prior to any changes to
e system or responsible party.
Responsible Party: Brad Krem
Title & Organization: PC-DUNN, NC-1-UT,LLC
Street address: 4747 Williams Drive
City, state, zip: Georgetown, TX 78633
Phone number(s): 512.819.4700
Email: [e-mail]
Sig ture: / i Date: 1-'',A !,' ' C
cAe., )I V\ " , a Notary Public for the State of xc,di 0.69
Runty of i `\,1WI1 , do hereby certify that
rsonally appeared before me this , day of ‘ _ hOe_AN/'I12,. and
;knowledge the due execution of the O t ns a d Maintenance Agreement .
/
'fitness my hand and official seal,
4111M,e, STEPHANIE WILLIAMS
pi? �, ^Notary Public,State of Texas
••. "� Comm.Expires 07-11-2026
'''n°;t, � Notary ID 12844077-5
Dal My commission expires `-A/1L/
ORM-EZ ^- 11/9/2(

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.
- 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.
After the bioretention cell is established, it 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 shall be kept in a
known set location and shall be available upon request.
Inspection 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 Trash/debris is present. Remove the trash/debris.
cell
The perimeter of the Areas of bare soil and/or Regrade the soil if necessary to remove the gully, plant ground
bioretention cell erosive gullies have cover and water until it is established. Provide lime and a one-
formed. time fertilizer application.
The structure is clogged. Unclog the structure and dispose of any sediment off-site.
The flow diversion
structure (if a licable Make any necessary repairs or replace if the damage is too much
pp ) The structure is damaged. for repair.
The inlet pipe is clogged (if Unclog the pipe and dispose of any sediment in a location where
applicable). it will not cause impacts to streams or the SCM.
The inlet pipe is cracked or
otherwise damaged (if Repair or replace the pipe.
applicable).
The inlet device Regrade the swale if necessary and provide erosion control
Erosion is occurring in the devices such as reinforced turf matting or riprap to avoid future
swale (if applicable).
erosion problems.
Stone verge is clogged or Remove sediment and clogged stone and replace with clean
covered in sediment(if
applicable). stone.
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 Search for the source of the sediment and remedy the problem if
to a depth greater than possible. Remove the sediment and dispose of it in a location
The pretreatment area three inches. where it will not cause impacts to streams or the SCM.
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.
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Bioretention Maintenance Requirements (continued)
SCM element: Potential problem: How to remediate the problem:
Best professional practices
show that pruning is Prune according to best professional practices. Maintain lines of
needed to maintain optimal sight between 2'-6'.
plant health.
Determine the source of the problem: soils, hydrology, disease,
etc. Remedy the problem and replace plants. Provide a one-time
Bioretention cell Plants are dead, diseased fertilizer application to establish the ground cover if a soil test
vegetation or dying. indicates it is necessary. If sod was used, check to see that it
was not grown on clay or impermeable soils. Replace sod if
necessary.
Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe
it on the plants rather than spraying.
Tree stakes/wires are
present six months after Remove tree stake/wires (which can kill the tree if not removed).
planting.
Spot mulch if there are only random void areas. Replace whole
Mulch is breaking down or mulch layer if necessary. Remove the remaining mulch and
has floated away. replace with triple shredded hard wood mulch at a maximum
depth of four inches.
Determine the extent of the clogging - remove and replace either
Soils and/or mulch are just the top layers or the entire media as needed. Dispose of the
Bioretention cell mulch spoil in an appropriate off-site location. Use triple shredded hard
and media clogged with sediment. wood mulch at a maximum depth of four inches. Search for the
source of the sediment and remedy the problem if possible.
An annual soil test shows
that pH has dropped or Dolomitic lime shall be applied as recommended per the soil test
heavy metals have and toxic soils shall be removed, disposed of properly and
accumulated in the soil replaced with new planting media.
media.
Clogging has occurred. Wash out the underdrain system.
The underdrain,filter Clean out the drop inlet. Dispose of the sediment in a location
fabric element, and outlet Clogging has occurred. where it will not cause impacts to streams or the SCM..
system
The drop inlet is damaged Repair or replace the drop inlet.
Erosion or other signs of
damage have occurred at Repair the damage and improve the flow dissipation structure.
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.
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