SW3240703_O&M Agreement/Plan_20240801

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Operation & Maintenance Ag a``® --
Project Name: PPI Office and Welding
Project Location: 70 Zane 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): South 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:
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: RNH Incorporated
Title&Organization: Randy Humphrey/President
Street address: 18636 Starcreek Drive
City, state, zip: Cornelius, NC 28031
Phone number(s): 704-281-8472
Email: rh [e-mail]
Signature: i'. ... Date: 6 _/e y
I, fr3 ,La ; 1) , a Notary Public for the State of pore, Ce-icL 21,
County of 1 ¶ frde q , do hereby certify that 2 I-itbiif r
6-y.
personally appeared before me this i lam` day of JO O&120 2-4 and
acknowledge the due execution of the Operations and aintenance Agreement .
Witness my hand and official seal, ,j7LL
t •
SYLVIA INTRIAGO ARGUELLO
Notary Public, North Car)lina
Iredell County
My Commission Expiies
1 December 04,2027 I
Seal My commission expires la /oq 1 V
STORM-EZ 6/14/2024
Version 1.5 O&M Agreement Page 1 of

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
applicable) pavement surface. 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
erosive gullies have cover and water until it is established. Provide lime and a one-
The perimeter of the formed. time fertilizer application.
sand 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
The flow diversion where it will not cause impacts to streams or the SCM.
structure (if applicable) Make any necessary repairs or replace if the damage is too
The structure is damaged.
much 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 Search for the source of the sediment and remedy the problem
accumulated to a depth of if possible. Remove the sediment and dispose of it in a location
greater than 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.
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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
system hours after a storm. filter 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
gg g 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.
The receiving water Discharges from the sand
filter are causing erosion Contact the local NCDEQ Regional Office.
or sedimentation in the
receiving water.
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