Sennebogen Operation and Maint Agreement 04.2024

Operation & Maintenance Agreement
Project Name:
Project Location:
Sennebogen Expansion
1957Sennebogen Trail Stanley, NC 28164
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
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
Quantitv:
Location(s):
Sand Filter Quantity:
Rainwater Harvesting Quantity:
Green Roof Quantity:
Level Spreader - Filter Strip Quantity:
Proprietary System Quantity:
Treatment Swale Quantity:
Dry Pond Quantity:
Disconnected Impervious Surface Present:
User Defined SCM Present:
Low Density Present:
1
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Type:
No
No
No
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: -LlLvv
Constantino Lannes
CEO/President
1957 Sennebo en Trail
Stanl , NC 28164
704-347-4910
clan nes sennebo enllc.com
Date: &VVk V202J,
Li Sa 1k —22 rS, a Notary Public for the State of h1 G
County of do hereby certify that C ri C. W • RoS S
personally appeared before me this day of AA0rri 1 0�l O'a-( and
acknowledge the due execution of the Operations and Maintenance Agreement.
Witness my hand and official seal,
N�
Seal '1111r11W, My commission expires
iTORM-EZ
(ersion 1.5
3 -M-2Z
O&M Agreement
4/9/2024
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 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance shall be kept in; 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:
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.
applicable)
pavement surface.
Areas of bare soil and/or
Regrade the soil if necessary to remove the gully, plant ground
erosive gullies have
cover and water until it is established. Provide lime and a one-time
The perimeter of the sand
formed.
fertilizer application.
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
The flow diversion
it will not 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
applicable).
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
Erosion is occurring in the
Regrade the swale if necessary and provide erosion control
Swale (if applicable).
devices such as reinforced turf matting or riprap to avoid future
problems with erosion.
Stone verge is clogged or
Remove sediment and clogged stone and replace with clean
covered in sediment (if
stone.
applicable).
Sediment has accumulated
Search for the source of the sediment and remedy the problem if
to a depth of greater than
possible. Remove the sediment and dispose of it in a location
six inches.
where it will not cause impacts to streams or the SCM.
Sediment chamber
(forebay)
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 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
underdrain collection
surface for more than 24
necessary. If water still ponds, remove the top few inches of filter
system
hours after a storm.
bed media and replace. If water still ponds, then consult an
appropriate professional.
Clogging has occurred.
gg g
Clean out the outlet device and dispose of sediment in a location
where it will 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.
Discharges from the sand
The receiving water
filter are causing erosion or
Contact the local NCDEQ Regional Office.
sedimentation in the
receiving water.