SW6240205_O&M Agreement/Plan_20240223

Operation & Maintenance Agreement
Project Name: Hoke County High School Replacement
Project Location: 505 S. Bethel Rd., Raeford, NC 28376
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: 0 Location(s):
Infiltration Trench Quantity: 0 Location(s):
Bioretention Cell Quantity: 2 Location(s): 505 S. Bethel Rd.
Wet Pond Quantity: 0 Location(s):
Stormwater Wetland Quantity: 0 Location(s):
Permeable Pavement Quantity: 0 Location(s):
Sand Filter Quantity: 0 Location(s):
Rainwater Harvesting Quantity: 0 Location(s):
Green Roof Quantity: 0 Location(s):
Level Spreader- Filter Strip Quantity: 0 Location(s):
Proprietary System Quantity: 0 Location(s):
Treatment Swale Quantity: 0 Location(s):
Dry Pond Quantity: 0 Location(s):
Disconnected Impervious Surface Present: No Location(s):
User Defined SCM Present: No Location(s):
Low Density Present: No Type:
CLICK 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: KENNETH SPELLS
Title & Organization: SUPERINTENDENT-HOKE COUNTY BOARD OF EDUCATION
Street address: 310 WOOLEY STREET
City, state, zip: RAEFORD, NC, 28376
Phone number(s): 910-875-4106
Email: [e-mail]
Signature: )—• Date:
11\\Q,.i '\(k C-Dm\\ , a Notary Public for the State of XADAV\ Cairo Vi in()
County of CA——, do hereby certify that ��, \,fir ,-1 s
personally appeared before me this 2_641-N day of C 0,,„Q, Ciy`k and
acknowledge the due execution of the Operations and Maintenance Agreement .
Witness my hand and official seal, (�,�,� \ C )4.0
Marsha Carroll
NOTARY PUBLIC
Hoke County
North Carolina
My Commission Expires February i 7,2026
Seal My commission expires eaO( `1-1
STORM-EZ
1/23/2024
Version 1.5 O&M Agreement Page 1 of 1

Bioretention Maintenance Requirements
Provide additional erosion protection such as reinforced turf
Erosion has occurred. matting or riprap if needed to prevent future erosion problems.
Important operation and maintenance procedures:
Immediately after the bioretention cell is established,the plants will be watered twice weekly if Remove the weeds,preferably by hand. If pesticide is used,
needed until the plants become established(commonly six weeks). Weeds are present. wipe it on the plants rather than spraying.
- 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 applicable) The structure is damaged. Make any necessary repairs or replace if the damage is too
much for repair.
The inlet pipe is clogged(i1 Unclog the pipe and dispose of any sediment in a location
applicable). where 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
swale(if applicable). devices such as reinforced turf matting or riprap to avoid
future erosion problems.
Stone verge is clogged or Remove sediment and clogged stone and replace with clean
covered in sediment(if stone.
applicable).
Flow is bypassing Regrade if necessary to route all flow to the pretreatment
pretreatment area and/or area. Restabilize the area after grading.
gullies have formed.
Sediment has Search for the source of the sediment and remedy the problem
accumulated to a depth if possible. Remove the sediment and dispose of it in a locatioi
The pretreatment area greater than three inches. where it will not cause impacts to streams or the SCM.

IBioretention Maintenance Requirements(continued) '
SCM element: Potential problem: How to remediate the problem:
Best professional
practices show that
pruning is needed to Prune according to best professional practices.Maintain lines
maintain optimal plant
of sight between 2'-6'.
health.
Determine the source of the problem: soils,hydrology,
disease,etc. Remedy the problem and replace plants. Provide
Bioretention cell Plants are dead,diseased a one-time fertilizer application to establish the ground cover if
vegetation or dying. a soil test 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 Remove tree stake/wires(which can kill the tree if not
present six months after removed).
planting.
Spot mulch if there are only random void areas. Replace
Mulch is breaking down or whole mulch layer if necessary. Remove the remaining mulch
has floated away. and replace with triple shredded 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 as needed.
Bioretention cell mulch Soils and/or mulch are Dispose of the spoil in an appropriate off-site location. Use
and media clogged with sediment. triple shredded hard 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 to
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
fabric element,and Clogging has occurred. Clean out the drop inlet. Dispose of the sediment in a location
gg g where it will not cause impacts to streams or the SCM..
outlet 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.