SW3240204_O&M Agreement/Plan_20240402

Operation & Maintenance Agreement
Project Name: Grassy Branch WRF Expansion
Project Location: 1629 Old Fish Road, Monroe, NC 28110
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: 0 Location(s):
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: Yes Type: Vegetated swales/roadside ditches
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: Union County
Title&Organization: Thomas Mann
Street address: 500 N Main Street,Suite 600
City,state,zip: Monroe,NC 28112
Phone number(s): [phone]
Email: [e-mail]
Signature: c. Date: 1--1 —
„L "'Y LI- s c;,CT ,a Notary Public for the State of /��r /L d-e.-.,.0..,/0"L-'.
County of ,do hereby certify that �,�.1 s „X. " - -�—
personally appeared before me this /S� day of /7 f r-;/ 2 O y it and
acknowledge the due execution of the Operatio.s a /ato ance Agreement.
Witness my hand and official seal, ,i^k
N',tounneyy
s�4"4M- G,4,9�'h•,a
NOTARY •
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� m� My Commission Expires 10/712025
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rots'44b COO
STORM-EZ 3/28/2024
Version 1.5 O&M Agreement Page 1 of 1

Low Density Maintenance Requirements
Important maintenance procedures:
The drainage area to the vegetated conveyance or vegetated receiving area will be carefully
managed to reduce the sediment load to the vegetated conveyance or vegetated receiving area.
After the initial fertilization to establish the grass in the vegetated conveyance or the vegetated
receiving area, fertilizer will not be applied to the vegetated receiving areas.
The vegetated conveyance or vegetated receiving area will be inspected quarterly. Records of operation and
maintenance will be kept in a known set location and will 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:
Vegetation is too short or Maintain grassed vegetation such that the swale or vegetated
Vegetation too long. area does not erode during the peak flow from the 10-year
storm
Trash/debris is present. Remove the trash/debris.
Areas of bare soil and/or Regrade the soil if necessary to remove the gully, and then re-
erosive gullies have sod (or plant with other appropriate species)and water until
Vegetated receiving formed. established. Provide lime and a one-time fertilizer application.
areas
Trees and/or other woody Remove the trees and woody vegetation from the swale,
vegetation are present in regrade the swale if necessary and re-establish grass as
the swale. shown on the approved plans.
Trash/debris is present. Remove the trash/debris.
Areas of bare soil and/or Regrade the soil if necessary to remove the gully, and then re-
erosive gullies have sod (or plant with other appropriate species)and water until
formed. established. Provide lime and a one-time fertilizer application.
Sediment covers the Remove sediment and dispose in an area that will not impact
grass at the bottom of the streams or SCMs. Re-sod if necessary.
Vegetated conveyances swale.
/swales/roadside Regrade the slopes to the permitted configuration per the
ditches (other than curb The side slope is steeper approved plan and reestablish vegetation. If as-built or existing
outlet swales) than the approved conditions do not allow the slopes to be regraded, contact the
configuration.
applicable permitting agency.
Determine the source of the problem: soils, hydrology,
Grass is dead, diseased disease, etc. Remedy the problem and replace plants.
or dying. Provide a one-time fertilizer application to establish the ground
cover if necessary.
Trees and/or other woody Remove the trees and woody vegetation from the vegetated
vegetation are present in conveyance, regrade the vegetated conveyance if necessary
the vegetated and re-establish grass as shown on the approved plans.
conveyance.
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Clogging has occurred. Clean out the outlet device. Dispose of the sediment off-site.
The outlet device (if
applicable)
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 site
are causing erosion or Contact the local NCDEQ Regional Office.
sedimentation in the
receiving water.
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