SW3230501_O&M Agreement/Plan_20230823

Operation & Maintenance Agreement
Project Name: Smith Industrial Subdivision
Project Location: 12400 Old Camden Road, Midland 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& corresponding O&M sheets will be added automatically):
Infiltration Basin Quantity: Location(s):
Infiltration Trench Quantity: Location(s):
Bioretention Cell Quantity: Location(s):
Wet Pond Quantity: Location(s):
Stormwater Wetland Quantity: Location(s):
Permeable Pavement Quantity: Location(s):
Sand Filter Quantity: 1 Location(s): North of Zane Road
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: Location(s):
Dry Pond Quantity: Location(s):
Disconnected Impervious Surface Present: No Location(s):
User Defined SCM Present: No Location(s):
Low Density Present: No Type:i
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: WD Smith & Grading
Title & Organization: Billy Smith /President
Street address: 12440 Grey Commerical Drive
City, state, zip: Midland, NC, 28701
Phone number(s): 907-500-8904
Email: [e-mail]
Signature: 'I/" i'J Date: 7I l ,2 J
1-32,44-=L&_
�5 C�,,, s , a Notary Public for the State of �//V�C •
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County of , do hereby certify that I Li) 10� <DI- t'
personally appeared before me this )3 day of M Gt,hC� 1 3 and
acknowledge the due execution of the Operations and Maintenance Agree ent .
Witness my hand and official seal, r^C�-�L—
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ti%Pal BLNO
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Seal My commission expires I f�$)
STORM-EZ / 3/9/2023
Version 1.5 O&M Agreement Page 1 of 3

Sand Filter Maintenance Requirements
Important operation and maintenance procedures:
- Manage the drainage area to reduce the sediment load to the sand filter.
- Clean out the sedimentation chamber or forebay whenever sediment depth exceeds six inches.
-At least once a year,skim the sand media
- Replace the sand filter media whenever it fails to function properly after maintenance.
After the sand filter is established, it shall be inspected quarterly and within 24 hours after every storm event greater than 1.0
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:
Entire sand filter Trash/debris is present. Remove the trash/debris.
Adjacent pavement(if Sediment is present on the Sweep or vacuum the sediment as soon as possible.
Areas of bare soil and/or Regrade the soil if necessary to remove the gully, plant ground cover and water
erosive gullies have until it is established. Provide lime and a one-time fertilizer application.
The perimeter of the sand formed.
filter
Vegetation is too short or Maintain vegetation at an appropriate height.
too long.
The structure is clogged. Unclog the structure and dispose of sediment in a location where it will not
The flow diversion cause impacts to streams or the SCM.
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 (if Unclog the pipe and dispose of sediment in a location where it will not cause
applicable). impacts to streams or the SCM.
The inlet pipe is cracked or
otherwise damaged (if Repair or replace the pipe.
applicable).
The inlet device
Erosion is occurring in the Regrade the swale if necessary and provide erosion control devices such as
swale(if applicable). reinforced turf matting or riprap to avoid future problems with erosion.
Stone verge is clogged or
covered in sediment(if Remove sediment and clogged stone and replace with clean stone.
applicable).
Sediment has accumulated Search for the source of the sediment and remedy the problem if possible.
to a depth of greater than Remove the sediment and dispose of it in a location where it will not cause
six inches. impacts to streams or the SCM.
Sediment chamber Provide additional erosion protection such as reinforced turf matting or riprap if
(forebay) Erosion has occurred. needed to prevent future erosion problems.
Weeds are present. Remove the weeds, preferably by hand. If a pesticide is used,wipe it on the
plants rather than spraying.

Sand Filter Maintenance Requirements(continued)
SCM element: Potential problem: How to remediate the problem:
Sand chamber and Water is ponding on the Check to see if the collector system is clogged and flush if necessary. If water
underdrain collection surface for more than 24 still ponds,remove the top few inches of filter bed media and replace. If water
system hours after a storm. still ponds,then consult an appropriate professional.
Clogging has occurred. Clean out the outlet device and dispose of sediment in a location where it will
gg g not cause impacts to streams or the SCM.
The outlet device
The outlet device is Repair or replace the outlet device.
damaged.
Erosion or other signs of
damage have occurred at Repair the damage and improve the flow dissipation structure.
the outlet.
The receiving water Discharges tram the sand
filter are causing erosion or Contact the local NCDEQ Regional Office.
sedimentation in the
receivina water.