20221617 Ver 1_05 - Building #1 - O&M EZ - Signed_20230301

Operation & Maintenance Agreement
Project Name:
Project Location:
Eastfield Business Park - Spec Building #1 Tenant Improvements
West Blanche St Selma, NC 27576 - Johnston County
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 & correspor
Infiltration Basin
Quantity:
Infiltration Trench
Quantity:
Bioretention Cell
Quantity:
Wet Pond
Quantity:
1
Stormwater Wetland
Quantity:
Permeable Pavement
Quantity:
Sand Filter
Quantity:
Rainwater Harvesting
Quantity:
Green Roof
Quantity:
Level Spreader - Filter Strip
Quantity:
Proprietary System
Quantity:
1
Treatment Swale
Quantity:
Dry Pond
Quantity:
Disconnected Impervious Surface
Present:
No
User Defined SCM
Present:
No
Low Density
Present:
No
O&M sheets will
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Type:
it: aaaea auiomauca
[West side of property
West
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.
Signature:
County of
Responsible Party: Kevin Dougherty
Title & Organization: Manager, Eastfield Associates, LLC
Street address: 101 South Raiford St
City, state, zip: Selma, NC 27576-3154
Phone number(s): 919-965-5661
Email: kmd(cDadvenl
personally appeared before me this
redev.com
WA'
Date: C
a Notary Public for the State f #Nr
do hereby certify that n
�r�
day of and
3
acknowledge the due execution of the Operat ns and M V
ance Agreement.
Witness mytiha' d.and official seal,
�' •-
r �OZARY ' U'
00
pus
Seal
My commission expires IV�
STORM-EZ 2/24/2023
Version 1.5 O&M Agreement Page 1 of 1

Operation & Maintenance Agreement
Project Name:
Project Location:
Eastfield Business Park - Spec Building #1 Tenant Improvements
West Blanche St Selma, NC 27576 - Johnston County
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 & cor
Infiltration Basin
Quantity:
Infiltration Trench
Quantity:
Bioretention Cell
Quantity:
Wet Pond
Quantity:
Stormwater Wetland
Quantity:
Permeable Pavement
Quantity:
Sand Filter
Quantity:
Rainwater Harvesting
Quantity:
Green Roof
Quantity:
Level Spreader - Filter Strip
Quantity:
Proprietary System
Quantity:
Treatment Swale
Quantity:
Dry Pond
Quantity:
Disconnected Impervious Surface
Present:
User Defined SCM
Present:
Low Density
Present:
O&M sheets will I
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Type:
I West side of orooertv I
I West side of orooertv I
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:
Title & Organization:
Street address:
City, state, zip:
Phone number(s):
Email:
Signature -
County of
personally appeared before me this
Kevin Dougherty
Manager, Eastfield Associates, LLC
101 South Raiford St
Selma, NC 27576-3154
919-965-5661
[e-mail]
, a Notary Public for the State of
, do hereby certify that
day of
acknowledge the due execution of the Operations and Maintenance Agreement.
Witness my hand and official seal,
Seal
My commission expires
Date
and
STORM-EZ 2/24/2023
Version 1 5 O&M Agreement Page 1 of 1

Wet Pond Maintenance Requirements
Important operation and 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 pond should be fertilized after the initial fertilization that is required to establish
the plants on the vegetated shelf.
Stable groundcover will be maintained in the drainage area to reduce the sediment load to the wet
pond.
_ If the pond must be drained for an emergency or to perform maintenance, the flushing of sediment
through the emergency drain will be minimized as much as possible.
At least once annually, a dam safety expert will inspect the embankment. Any problems that are
found will be repaired immediately.
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.
After the wet pond is established, it will 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 wet pond
Trash/debris is present.
Remove the trash/debris.
The perimeter of the wet
Areas of bare soil and/or
Regrade the soil if necessary to remove the gully, plant ground
pond
erosive gullies have
cover and water until it is established. Provide lime and a one -
formed.
time fertilizer application.
The inlet pipe is clogged
(if applicable).
Unclog the pipe. Dispose of the sediment off -site.
The inlet pipe is cracked
The inlet device
or otherwise damaged (if
Repair or replace the pipe.
applicable).
Erosion is occurring in the
Regrade the swale if necessary and provide erosion control
swale (if applicable).
devices such as reinforced turf matting or riprap to avoid future
problems with erosion.
- _-
Sediment has
accumulated to a depth
Search for the source of the sediment and re a problem
VmEUQr than the original
if possible. Remove the sedime spose of it in a
design a ediment
location where it will a impacts to streams or the SCM.
storage.
The forebay
Erosion has
rovide �adi�0�rotection such as reinforced turf
matting vent future erosion problems.
Weeds are present.
Remove the weeds, preferably by hand. If p is used,
wipe it on the plants rather than spraying.
Pre -Treatment provided by StormTech
MC-3500 Isolator Row. See attachment for
maintenance requirements

Wet Pond Maintenance Reauirements (Continued)
SCM element:
Potential problem:
How to remediate the problem:
Sediment has
accumulated to a depth
Search for the source of the sediment and remedy the problem
greater than the original
if possible. Remove the sediment and dispose of it in a
design sediment storage
location where it will not cause impacts to streams or the SCM.
depth.
Algal growth covers over
Consult a professional to remove and control the algal growth.
The main treatment area
50 /o of the area.
Cattails, phragmites or
other invasive plants covers
Remove the plants by wiping them with pesticide (do not
50% of the basin surface.
spray).
p y)'
Best professional
practices show that
pruning is needed to
Prune according to best professional practices.
maintain optimal plant
health.
The vegetated shelf
Determine the source of the problem: soils, hydrology,
Plants are dead, diseased
disease, etc. Remedy the problem and replace plants. Provide
or dying.
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.
Shrubs have started to
Remove shrubs immediately.
grow on the embankment.
Evidence of muskrat or
Consult a professional to remove muskrats or beavers and
beaver activity is present.
repair any holes or erosion.
A tree has started to grow
Consult a dam safety specialist to remove the tree.
The embankment
on the embankment.
An annual inspection by
an appropriate
professional shows that
Make all needed repairs immediately.
the embankment needs
repair.
Clogging has occurred.
Clean out the outlet device and dispose of any sediment in a
The outlet device
location where it will not cause impacts to streams or the SCM.
The outlet device is
damaged.
Repair or replace the outlet device.
Weeds or volunteer trees
Remove the weeds or trees.
a
are growing on the mat.
Floating wetland island
(if applicable)
The anchor cable is
damaged, disconnected or
Restore the anchor cable to its design state.
missing.

Wet Pond Maintenance Requirements (Continued)
SCM element:
Potential problem:
How to remediate the problem:
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 wet
pond are causing erosion
or sedimentation in the
Contact the local NCDEQ Regional Office.
receiving water.

Wet Detention Pond Design Summary
Wet Poiiti Dia rarn
WET POND ID F BAY MAIN POND
1
Perma t Pool El.
A
Permanent Pool El.
164.5
Temporary
N/A
Pretreatment other No
Clean Out the
#VALUE!
Clean Out Depth:
9.5
than foreba�
Sedi t Removal E
/A
Sediment Removal E
155
Has Veg. Filter? No
tom Elevation:
N
Bottom Elevation:
156
ATTACH ADDITIONAL SHEETS IF NECESSARY
Pre -Treatment provided by StormTech
MC-3500 Isolator Row. See attachment for
maintenance requirements

Proprietary System Maintenance Requirements l
How many devices are
Contech StormFilters?
ATTACH MANUFACTURER'S MAINTENANCE MANUAL FOR ALL PROPRIETARY DEVICES
SEE ATTACHMENT

9.0'"spection and Maintenance
9.1 Isolator Row Plus Inspection
Regular inspection and maintenance are essential to
assure a properly functioning stormwater system.
Inspection is easily accomplished through the
manhole or optional inspection ports of an Isolator
Row Plus. Please follow local and OSHA rules for a
confined space entry.
Inspection ports can allow inspection to be
accomplished completely from the surface without
the need for a con- fined space entry. Inspection
ports provide visual access to the system with the
use of a flashlight. A stadia rod may be inserted to
determine the depth of sediment. If upon visual
inspection it is found that sediment has accumulated
to an average depth exceeding 3" (76 mm), cleanout
is required.
A StormTech Isolator Row Plus should initially be
inspected immediately after completion of the
site's construction. While every effort should
be made to prevent sediment from entering the
system during construction, it is during this time
that excess amounts of sediments are most likely
to enter any stormwater system. Inspection and
maintenance, if necessary, should be performed
prior to passing responsibility over to the site's
owner. Once in normal service, a StormTech Isolator
Row Plus should be inspected bi-annually until
an understanding of the sites characteristics is
developed. The site's maintenance manager can
then revise the inspection schedule based on
experience or local requirements.
9.2 Isolator Row Plus Maintenance
JetVac maintenance is recommended if sediment
has been collected to an average depth of 3" (76
mm) inside the Isolator Row Plus. More frequent
maintenance may be required to maintain minimum
flow rates through the Isolator Row Plus. The
JetVac process utilizes a high pressure water nozzle
to propel itself down the Isolator Row Plus while
scouring and suspending sediments. As the nozzle is
retrieved, a wave of suspended sediments is flushed
back into the manhole for vacuuming. Most sewer
and pipe maintenance companies have vacuum/
JetVac combi- nation vehicles. Fixed nozzles designed
for culverts or large diameter pipe cleaning are
preferable. Rear facing jets with an effective spread
of at least45" (1143 mm) are best. StormTech
recommends a maximum nozzle pressure of 2000
psi be utilized during cleaning. The JetVac process
shall only be performed on StormTech Rows that
have ADS Plus fabric over the foundation stone.
A Flamp (flared end ramp) is attached to the inlet
pipe on the inside of the chamber end cap to
provide a smooth transition from pipe invert to
fabric bottom. It is configured to improve chamber
function performance over time by distributing
sediment and debris that would otherwise collect at
the inlet. It also serves to improve the fluid and solid
flow back into the inlet pipe during maintenance
and cleaning, and to guide cleaning and inspection
equipment back into the inlet pipe when complete.
Flamp (Flared End Ramp)
A typical JetVac truck (This is not a StormTech
product.)
Examples of culvert cleaning nozzles appropriate
for Isolator Row Plus maintenance. (These are not
StormTech products).