SW3240202_O&M Agreement/Plan_20240212

Operation & Maintenance Agreement
Project Name: Rowan 85 Trade Center
Project Location: 1200 Webb Road, Granite Quarry, 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: 3 Location(s): SCM 1:North of existing stream,between
Rainwater Harvesting Quantity: Location(s): proposed extension and access road.
Green Roof Quantity: Location(s): SCM 2:South of existing stream,between
•
Level Spreader Filter Strip Quantity: Location(s): parking and proposed road extension
SCM 3:South of site,between proposed road
Proprietary System Quantity: Location(s): extension and neighboring site.
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 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: Murray Reavis
Title&Organization: CFO, Rooker Co
Street address: 445 Bishop Street
City,state,zip: Atlanta,GA,30318-4303
Phone number(s): 678-367-4213
Email: [e-mail]"124
Signature: Date: 1 ' % Aq
I, .t f I _ (CA_ , a Notary Public for the State of (Tear
County of ,do hereby certify that ✓Ir 1Qe.i
personally appeared before me this day of Alt✓A ?.41 and
acknowledge the due execution of the Operations and Maintenance Agreement.
Witness my hand and official seal, 1 uJot. a• "ek-
pF„G.E MARIA A.ARNOLD
^W' " NOTARY PUBLIC
. •i�.'"` COBB COUNTY
1,41:- _ •it STATE OF GEORGIA
�,tio-as= My Comm.Expires Oct.22,2027
Seal My commission expires to (i 24%02_1
STORM-EZ 12/19/2023
Version 1.5 O&M Agreement Page 1 of 1

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 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:
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-
The perimeter of the sand formed. time 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) Make any necessary repairs or replace if the damage is too much
The structure is damaged.
for repair.
The inlet pipe is clogged (if Unclog the pipe and dispose of sediment in a location where it
applicable). 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). problems with erosion.
Stone verge is clogged or Remove sediment and clogged stone and replace with clean
covered in sediment (if
applicable). stone.
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) Provide additional erosion protection such as reinforced turf
Erosion has occurred. 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. Clean out the outlet device and dispose of sediment in a location
gg g 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.
The receiving water Discharges from the sand
filter are causing erosion or Contact the local NCDEQ Regional Office.
sedimentation in the
receiving water.