B.
c. Verification of existing taps in service by flowing water, dye test, or visually
with a pan and tilt head camera or other means.
d. Cleaning of line (recorded on video tape).
Root cutting
f. Construct and complete any and all point repairs deemed necessary shall
receive Engineer’s approval before reworking the lines and the liner is
installed.
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Prior to installation, the diversion pumping system, including back-up pumps,
shall be tested and running.
3.03 PREPARATION
A.
CLEANING, ROOT CUTTING AND INSPECTION
Debris shall be removed from the pipeline with high velocity jet cleaners. All
roots shall be cut and removed with appropriate equipment. The pipeline shall be
inspected with CCTV equipment to assure that the pipe is in a condition that it
can be lined. Obstructions shall be removed and services marked for
reinstatement prior to lining.
BYPASS PUMPING
Bypass pumping shall usually be made by plugging the upstream manhole and
pumping the sewage into the downstream manhole, or by pumping into an
alternate sewer system of adequate capacity to handle the additional sewage flow.
The pump and bypass lines shall be sized to handle the anticipated flows.
LATERAL CONNECTIONS
Contractor shall record location, size, material and relative invert elevation of
each lateral connection with respect to the pipeline.
3.04 INSTALLATION PROCEDURES
A.
INSTALLATION
Installation of the liner shall be through existing or new manholes. Excavation for
liner insertion shall not be permitted except to remove and replace the manhole
cones, if necessary and/or required.
WATER
Where water is used for insertion and curing processes it may be supplied from
existing fire hydrants. The Contractor shall make arrangements for obtaining
water. Costs for water shall be borne by the Contractor.
RESIN IMPREGNATION
The Contractor shall designate a location where the liner tube will be impregnated
with resin prior to installation. The liner tube shall be impregnated by vacuum or
other approved means. The Contractor shall allow the Owner and Engineer to
2019 CIPP Lining Project CIPP Lining of Existing Sewers (Hot Water or Steam)
Nashua, NH
02650-8
