Page 122 - Trenchless Technology Piping Installation and Inspection

88 Cha pte r T w o

samples for testing shall be of tube and resin system similar
to that proposed for actual construction. It is required that
CIPP samples with and without plastic coating meet these
chemical-testing requirements.
6.2 Hydraulic capacity—Overall, the hydraulic cross-section
shall be maintained as large as possible. The CIPP shall
have a minimum of the full flow capacity of the original
pipe before rehabilitation. Calculated capacities may be
derived using a commonly accepted roughness coefficient
for the existing pipe material taking into consideration its
age and condition.
6.3 CIPP field samples—When requested by the owner, the
contractor shall submit test results from field installations
of the same resin system and tube materials as proposed for
the actual installation. These test results must verify that
the CIPP physical properties specified in Sec. 5.5 have been
achieved in previous field applications. Samples for this
project shall be made and tested as described in Sec. 10.1.
7. Installation responsibilities for incidental items
7.1 It shall be the responsibility of the owner to locate and des-
ignate all manhole access points open and accessible for the
work, and provide rights-of-access to these locations. If a
street must be closed to traffic because of the orientation of
the sewer, the owner shall institute the actions necessary to
provide access during this for the mutually agreed time
period. The owner shall also provide free access to water
hydrants for cleaning, installation and other process related
work items requiring water.
7.2 Cleaning of sewer lines—The contractor, when required,
shall remove all internal debris out of the sewer line that
will interfere with the installation of CIPP. The owner shall
also provide a dumpsite for all debris removed from the
sewers during the cleaning operation. Unless stated other-
wise, it is assumed this site will be at or near the sewage
treatment facility to which the debris would have arrived in
absence of the cleaning operation. Any hazardous waste
material encountered during this project will be considered
as a changed condition.
7.3 Bypassing sewage—The contractor, when required, shall
provide for the flow of sewage around the section or sec-
tions of pipe designated for repair. Plugging the line at an
existing upstream manhole and pumping the flow into a
downstream manhole or adjacent system shall make the
bypass. The pump(s) and bypass line(s) shall be of adequate
capacity to accommodate the sewage flow. The owner may
require a detail of the bypass plan to be submitted.