SW3190801_Form (O&M)_20190913

Operation & Maintenance Agreement
Project Name: I Project Albert;- TDY Industries, LLC
Project Location: I Monroe, North Carolina
Cover Pa e
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 & corresponding O&M tables will be added automatically):
Bioretention Cell
Quantity:
Location(s):
Dry Detention Basin
Quantity:[
Location(s):
Grassed Swale
Quantity:
Location(s):
Green Roof
Quantity:
Location(s):
Infiltration Basin
Quantity:
Location(s):
Infiltration Trench
Quantity:
�_.
Location(s):
Level SpreaderNFS
Quantity:
Location(s):I
Permeable Pavement
Quantity:
Location(s):I
Proprietary System
Quantity:
Location(s):1
Rainwater Harvesting
Quantity:
Location(s):
Sand Filter
Quantity:
Location(s):
Stormwater Wetland
Quantity:
Location(s):
Wet Detention Basin
Quantity:
1
Location(s):
South of proposed building
Disconnected Impervious Area
Present:
No
Location(s):
User Defined BMP
Present:
IN
Location(s):
I 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:
I ucker Kedtoro
Title & Organization:
President, ATI Speciat
Street address:
2020 Ashcraft Avenue
City, state, zip:
Monroe. NC 28110
Phone number(s):
Email:
Ti—LemrQ&AfnrA69i4TIn
Signature: Date: 021113119
1, 6 �r 14 . ? a ary Public for the State of N G..
County of �� t� do hea y certify that V IL'Kt,r 0—tot {+ r �i
personally appeared before me this day of SCw and
acknowledge the due execution of the Operations and Maintenance
`Agreement.
Witness my hand and official seal, ay f "9'•�
!i 1111�11111111/I
P yo
Notary Public _
Union
County;
Se*""�- N Alp \ ` My commission expires %C k-�+ P-f' 9*41 ;L0
11111 %%0
STORM-EZ 9/11/2019
Version 1.4 O&M Manual Page 1 of 3

Wet Detention Pond Maintenance Requirements
The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one
is provided.
Important maintenance procedures:
_ Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the
basin should be watered twice weekly if needed, until the plants become established (commonly six weeks).
_ No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to
establish the plants on the vegetated shelf.
Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention
basin.
If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the
emergency drain should be minimized to the maximum extent practical.
- Once a year, a dam safety expert should inspect the embankment.
After the wet detention pond is established, it should be inspected once a month 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 should be kept in a known
set location and must 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 I will remediate the problem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
Regrade the soil if necessary to remove the gully, and then plant a
The perimeter of the BMP
Areas of bare soil and/or
erosive gullies have formed.
ground cover and water until it is established. Provide lime and a one-
time fertilizer application.
Maintain vegetation at a height of approximately six inches.
Vegetation is too short or too
long.
The inlet device
The pipe is dogged.
Unclog the pipe. Dispose of the sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Regrade the Swale if necessary to smooth it over and provide erosion
Erosion is occurring in the
Swale.
control devices such as reinforced turf matting or riprap to avoid future
problems with erosion.
Stone verge is dogged or
Remove sediment and replace with dean stone.
covered in sediment (if
applicable).
The forebay
Sediment has accumulated to
Search for the source of the sediment and remedy the problem if
a depth greater than the
possible. Remove the sediment and dispose of it in a location where it
original design depth for
will not cause impacts to streams or the BMP.
sediment storage.
Erosion has occurred.
Provide additional erosion protection such as reinforced turf 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. .
The vegetated shelf
Best professional practices
Prune according to best professional practices
show that pruning is needed
to maintain optimal plant
health.
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 to establish the ground cover if a soil test indicates it is
necessary.
Weeds are present.
Remove the weeds, preferably by hand. If pesticide is used, wipe it on
the plants rather than spraying.
STORM-EZ 9/11/2019
Version 1.4 O&M Manual Page 2 of 3

Wet Detention Pond Maintenance Requirements (Continued)
The main treatment area Sediment has accumulated to Search for the source of the sediment and remedy the problem if
a depth greater than the possible. Remove the sediment and dispose of it in a location where it
original design sediment will not cause impacts to streams or the BMP.
storage depth.
Algal growth covers over 50% Consult a professional to remove and control the algal growth.
of the area.
Cattails, phragmites or other
invasive plants cover 50% of
the basin surface.
embankment Shrubs have started to grow
on the embankment.
Evidence of muskrat or
beaver activity is present.
A tree has started to grow on
the embankment.
The outlet device
The receiving water
An annual inspection by an
appropriate professional
shows that the embankment
needs repair. (if applicable)
Clogging has occurred.
The outlet device is damaged
Erosion or other signs of
damage have occurred at the
Remove the plants by wiping them with pesticide (do not spray).
Remove shrubs immediately.
Use traps to remove muskrats and consult a professional to remove
beavers.
Consult a dam safety specialist to remove the tree.
all needed repairs.
Clean out the outlet device. Dispose of the sediment off -site.
Repair or replace the outlet device.
Contact the local NC Department of Environment and Natural
Resources Regional Office.
The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not
readily penetrate into accumulated sediments. —
I� Wet Detention Pond Design Summary
Wet Pond Diaoram
WET POND ID FOREBAY MAIN POND
SCM 1
Permanent Pool El.
643.5
Permanent Pool El.
643.5
Temporary Pool El:
643.96
Temporary Pool El:
643.96
Pretreatment other
Clean Out Depth:
5
Clean Out Depth:
6
Yes
than forebay?
Sediment Removal El:
636.5
Sediment Removal El:
637.5
Has Veg. Filter? Yes
Bottom Elevation:
639
Bottom Elevation:
638
STORM-EZ 9/11/2019
Version 1.4 O&M Manual Page 3 of 3