Call StormTech at
860.529.8188
or
888.892.2694
or visit our website at
www.stormtech.com
for technical and product information.
31
12.0 Inspection and Maintenance
Looking down the Isolator Row
A typical JetVac truck (This is not a StormTech product.)
Examples of culvert cleaning nozzles appropriate for
Isolator Row maintenance. (These are not StormTech
products).
12.1 ISOLATOR ROW 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. 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
confined 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 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 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.
12.2 ISOLATOR ROW MAINTENANCE
JetVac maintenance is recommended if sediment has
been collected to an average depth of 3” (76 mm) inside
the Isolator Row. More frequent maintenance may be
required to maintain minimum flow rates through the
Isolator Row. The JetVac process utilizes a high pressure
water nozzle to propel itself down the Isolator Row 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
combination vehicles. Fixed nozzles designed for culverts
or large diameter pipe cleaning are preferable. Rear facing
jets with an effective spread of at least 45” (1143 mm)
are best. The JetVac process shall only be performed
on StormTech Rows that have AASHTO class 1 woven
geotextile over the foundation stone (ADS 315ST or equal).
Summary of Contents for StormTech DC-780
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