SW1190901_O&M Agreement_20200224

Operation & Maintenance Agreement
Project Name
Project Location:
Asheville Regional Airport - Parking Lots- LOW DENSITY
Asheville Regional Airport, Fletcher, NC
Cover Page
Maintenance records shall be kept on the following BMP(s). This maintenance record shall be kept in a log in a known set location.
Any deficient BMP 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 BMP(s).
The BMP(s) on this project include (check all that apply & cc
Bioretention Cell Quantity:
Dry Detention Basin
Grassed Swale
Green Roof
Infiltration Basin
Infiltration Trench
Level SpreaderNFS
Permeable Pavement
Proprietary System
Rainwater Harvesting
Sand Filter
Stormwater Wetland
Wet Detention Basin
Disconnected Impervious Area
User Defined BMP
Quantity:
Quantity:
Quantity:
Quantity:
Quantity:
Quantity:
Quantity:
Quantity:
Quantity:
Quantity:
Quantity:
Quantity:
Present:
Present:
ig O&M tables will be added automatically):
Location(s):
Location(s):
Location(s): Vegetated Conveyance from parking lot
Location(s):
Location(s):
Location(s):
Location(s): Downstream of North Parking Area
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed
for each BMP above, and attached O&M tables. I agree to notify NCDENR 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:
County of
personally appeared before me this
Lew Bleiweis
Executive Director, Greater Asheville Regional Aiport Authority
61 Terminal Drive, Suite 1
Fletcher, NC 28732
[phone]
[e-mail]
� I
, a Notary Public for the State of
, do hearby certify that
day of
acknowledge the due execution of the Operations and Maintenance Agreement.
Witness my hand and official seal,
O&M Manual
Date:
and
2/21 /2020
Page 1 of 5

Seal My commission expires
STORM-EZ 2/21 /2020
Version 1.4 O&M Manual Page 2 of 5

Level Spreader -Vegetated Filter Strip / Restored Riparian Buffer Maintenance Requirements
Important maintenance procedures:
_ Immediately after the filter strip is established, any newly planted vegetation will be watered twice weekly if
needed until the plants become established (commonly six weeks).
- Once a year, the filter strip will be reseeded to maintain a dense growth of vegetation
- Stable groundcover will be maintained in the drainage area to reduce the sediment load to the vegetation.
Two to three times a year, grass filter strips will be mowed and the clippings harvested to promote the growth of
_ thick vegetation with optimum pollutant removal efficiency. Turf grass should not be cut shorter than 3 to
5 inches and may be allowed to grow as tall as 12 inches depending on aesthetic requirements (NIPC, 1993).
Forested filter strips do not require this type of maintenance.
- Once a year, the soil will be aerated if necessary.
- Once a year, soil pH will be tested and lime will be added if necessary.
After the filter strip is established, it will be inspected quarterly and within 24 hours after every storm event greater than 1.0
inch (or 1.5 inches if in a Coastal County). 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.
BMP element:
Potentialproblem:
How to remediate theproblem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the BMP
Areas of bare soil and/or
Regrade the soil if necessary to remove the gully, and then plant a
erosive gullies have formed.
ground cover and water until it is established. Provide lime and a one-
time fertilizer application.
Vegetation is too short or too
Maintain vegetation at a height of approximately six inches.
long.
The flow splitter device (if
The flow splitter device is
Unclog the conveyance and dispose of any sediment off -site.
applicable)
clogged.
The flow splitter device is
Make any necessary repairs or replace if damage is too large for
damaged.
repair.
The inlet device
The pipe is clogged.
Unclog the pipe. Dispose of the sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Erosion is occurring in the
Regrade the swale if necessary to smooth it over and provide erosion
swale.
control devices such as reinforced turf matting or riprap to avoid future
problems with erosion.
Stone verge is clogged or
Remove sediment and replace with clean stone.
covered in sediment (if
applicable).
STORM-EZ 2/21 /2020
Version 1.4 O&M Manual Page 3 of 5

LS-VFS / Restored Riparian Buffer Maintenance Requirements (Continued)
The swale and the level lip
The swale is clogged with
Remove the sediment and dispose of it off -site.
sediment.
The level lip is cracked,
Repair or replace lip.
settled, undercut, eroded or
otherwise damaged.
There is erosion around the
Regrade the soil to create a berm that is higher than the level lip, and
end of the level spreader that
then plant a ground cover and water until it is established. Provide
shows stormwater has
lime and a one-time fertilizer application.
bypassed it.
Trees or shrubs have begun
Remove them.
to grow on the swale or just
downslope of the level lip.
The bypass channel
Areas of bare soil and/or
Regrade the soil if necessary to remove the gully, and then reestablish
erosive gullies have formed.
proper erosion control.
Turf reinforcement is
Study the site to see if a larger bypass channel is needed (enlarge if
damaged or ripap is rolling
necessary). After this, reestablish the erosion control material.
downhill.
The filter strip
Grass is too short or too long
Maintain grass at a height of approximately three to six inches.
(if applicable).
Areas of bare soil and/or
Regrade the soil if necessary to remove the gully, and then plant a
erosive gullies have formed.
ground cover and water until it is established. Provide lime and a one-
time fertilizer application.
Sediment is building up on the
Remove the sediment and restabilize the soil with vegetation if
filter strip.
necessary. Provide lime and a one-time fertilizer application.
Plants are desiccated.
Provide additional irrigation and fertilizer as needed.
Plants are dead, diseased or
Determine the source of the problem: soils, hydrology, disease, etc.
dying.
Remedy the problem and replace plants. Provide a one-time fertilizer
application.
Nuisance vegetation is
Remove vegetation by hand if possible. If pesticide is used, do not
choking out desirable species.
allow it to get into the receiving water.
The receiving water
Erosion or other signs of
Contact the NCDENR local Regional Office, or the 401 Oversight Unit
damage have occurred at the
at 919-733-1786.
outlet.
STORM-EZ 2/21 /2020
Version 1.4 O&M Manual Page 4 of 5

Grassed Swale Maintenance Requirements
Important maintenance procedures:
The drainage area of the grassed swale will be carefully managed to reduce the sediment load to the grassed
swale.
After the first-time fertilization to establish the grass in the swale, fertilizer will not be applied to the grassed
swale.
The grassed swale will be inspected once a quarter. 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.
BMP element:
Potential problem:
How to remediate the problem:
The perimeter of the BMP
Areas of bare soil and/or
Regrade the soil if necessary to remove the gully, and then plant a
erosive gullies have formed.
ground cover and water until it is established. Provide lime and a one-
time fertilizer application.
Vegetation is too short or too
Maintain vegetation at a height of approximately six inches.
long.
The entire length of the
Trash/debris is present.
Remove the trash/debris.
swale
Areas of bare soil and/or
Regrade the soil if necessary to remove the gully, and then re -sod (or
erosive gullies have formed.
plant with other appropriate species) and water until established.
Provide lime and a one-time fertilizer application.
Sediment covers the grass at
Remove sediment and dispose in an area that will not impact streams
the bottom of the swale.
or BMPs. Re -sod if necessary.
Vegetation is too short or too
Maintain vegetation at a height of approximately six inches.
long.
The outlet device
Clogging has occurred.
Clean out the outlet device. Dispose of the sediment off -site.
The outlet device is damaged
Repair or replace the outlet device.
The receiving water
Erosion or other signs of
Contact the local NC Department of Environment and Natural
damage have occurred at the
Resources Regional Office.
outlet.
STORM-EZ 2/21 /2020
Version 1.4 O&M Manual Page 5 of 5