SW1221002_O&M Agreement/Plan_20230928

Operation & Maintenance Agreement
Project Name: Asheville Regional Airport Terminal Modernization and Expansion
Project Location: Fletcher, 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: Location(s):
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: 2 Location(s): Swales 3 and 4,south of airport terminal
Dry Pond Quantity: 1 Location(s): South of airport terminal
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: Michael Reisman
Title&Organization: Chief Operating Officer,Greater Asheville Regional Airport Authority
Street address: 61 Terminal Drive,Suite 1
City, state,zip: Fletcher,North Carolina 28732
Phone number(s): 828-654-3253
Email: [e-mail]
Signature: rh.a. / C_.,11.4.4&- Date: !-a I•Z'3
I, C't 1A 1�Z a Notary Public for the State of 0� \ ei rat
A' A.,
County of �(1-Q i ►Y� ,do hereby certify that bP,19.1 1 �1 ru
personally appeared before me this Al? day of ±Q pip yU'Q?r— ,. .09.5 and
acknowledge the due execution of theccial
rations and ' tenance Agreement.
Witness my hand and offi seal, /
RITA YANZ
NOTARY PUBL C
Henderson County
North Carolina
My Commission Expires October 11,2025
Seal My commission expires 0(`..A ,r' \A ;-oas
STORM-EZ 9/15/2023
Version 1.5 O&M Agreement Page 1 of 1

Treatment Swale Maintenance Requirements
Important operation and maintenance procedures:
_The drainage area of the grassed swale will be carefully managed to reduce the sediment load to the
grassed swale.
After the initial fertilization to establish the grass in the swale,fertilizer will not be applied to the
treatment swale.
The grassed swale will be inspected quarterly. 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:
Trash/debris is present. Remove the trash/debris.
Areas of bare soil and/or Regrade the soil if necessary to remove the gully, re-sod (or
erosive gullies have plant with other appropriate species)and water until established.
formed. Provide lime and a one-time fertilizer application.
Sediment covers the grass Remove sediment and dispose in an area that will not impact
at the bottom of the swale. streams or SCMs. Re-sod if necessary.
The entire length of the Vegetation is too short or Maintain grassed vegetation such that the swale or vegetated
swale too long. area does not erode during the peak flow from the 10-year storm
Determine the source of the problem: soils, hydrology, disease,
Grass is dead, diseased or etc. Remedy the problem and replace plants. Provide a one-
dying. time fertilizer application to establish the ground cover if
necessary.
Trees and/or other woody Remove the trees and woody vegetation from the treatment
vegetation are present in swale, regrade the treatment swale if necessary and re-establish
the treatment swale. grass as shown on the approved plans.
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
treatment swale are Contact the local NCDEQ Regional Office.
causing erosion or
sedimentation in the

Dry Pond Maintenance Requirements
Important operation and maintenance procedures:
- The drainage area will be managed to reduce the sediment load to the dry pond.
- Immediately after the dry pond is established,the vegetation will be watered twice weekly if needed until the
plants become established(commonly six weeks).
- After the initial fertilization to establish vegetation in the dry pond,fertilizer will not be applied to the dry pond.
- The vegetation in and around the basin will be maintained at a height of approximately six inches.
- At least once annually,a dam safety expert will inspect the embankment.Any problems that are found will be
repaired immediately.
After the dry pond 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:
The entire SCM Trash/debris is present. Remove the trash/debris.
The perimeter of the Areas of bare soil and/or erosive Regrade the soil if necessary to remove the gully,plant ground
SCM gullies have formed. cover and water until it is established. Provide lime and a one-
time fertilizer application.
The inlet pipe is clogged(if Unclog the pipe. Dispose of the sediment in a location where it
applicable). will not cause impacts to streams or the SCM.
The inlet pipe is cracked or Repair or replace the pipe.
The inlet device otherwise damaged(if applicable).
Erosion is occurring in the swale(if Regrade the swale if necessary and provide erosion control
applicable). devices such as reinforced turf matting or riprap to avoid future
problems with erosion.
Sediment has accumulated to a Search for the source of the sediment and remedy the problem
depth greater than the original if possible. Remove the sediment and dispose of it in a location
design depth for sediment storage.where it will not cause impacts to streams or the SCM.
The 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 pesticide is used,
wipe it on the plants rather than spraying.
Sediment has accumulated to a Search for the source of the sediment and remedy the problem
depth greater than the original if possible. Remove the sediment and dispose of it in a location
design depth for sediment storage.where it will not cause impacts to streams or the SCM.
The main treatment area Water is standing more than 5 Check the outlet structure for clogging. If it is a design issue,
days after a storm event. consult an appropriate professional.
Weeds and noxious plants are Remove the weeds,preferably by hand. If pesticide is used,
growing in the main treatment wipe it on the plants rather than spraying.
area.
Dry Pond Maintenance Requirements(continued}
SCM element: Potential problem: How to remediate the problem:
Shrubs have started to grow on Remove shrubs immediately.
the embankment.
Evidence of muskrat or beaver Consult a professional to remove muskrats or beavers and
activity is present. repair any holes or erosion.
The embankment A tree has started to grow on the
embankment. Consult a dam safety specialist to remove the tree.
An annual inspection by an
appropriate professional shows Make all needed repairs immediately.
that the embankment needs
repair.
Clogging has occurred. Clean out the outlet device. Dispose of the sediment in a
The outlet device gg g location where it will not cause impacts to streams or the SCM.
The outlet device is damaged Repair or replace the outlet device.
Erosion or other signs of damage Repair the damage and improve the flow dissipation structure.
have occurred at the outlet.
The receiving water Discharges from the dry pond are
causing erosion or sedimentation Contact the local NCDEQ Regional Office.
in the receiving water.
Dry Detention Pond Design Summary
Dr/P0,1c1
DRY POND ID FOREBAY MAIN POND
'Dry Detention Pond 11 Temporary Pool El: 2122.5 Temporary Pool El: 2120.1
Clean Out Depth: 0.5 Clean Out Depth: 2.6
Pretreatment Yes Sediment Storage El: 2122 Sediment Storage El: 2117.5
Has Veg.Filter No Bottom Elevation: 2121 Bottom Elevation: 2114.1