[Ord. 146, 2/18/1992, § 700]
1.
No final testing shall be performed without the presence of an authorized
Township representative. Any defects or problems discovered by developer/contractor
during preliminary testing shall be immediately reported to the Township.
2.
The developer/contractor shall provide all labor, materials, testing
apparatus and accessories for same necessary for specified testing.
3.
Satisfactory test results are not to be construed as an approval
of system installation. The system is not deemed approved until official
acceptance by the Township Board of Supervisors and satisfactory completion
of the maintenance period.
4.
The developer/contractor shall be held responsible for corrections
of failures or defects that may be discovered during testing or the
maintenance period at no cost to the Township.
[Ord. 146, 2/18/1992, § 701]
1.
A calibration certificate not more than six months old must be provided
to the Township for all test gauges utilized.
2.
Prior to testing, manholes shall be thoroughly cleaned and pressure-washed
if necessary. All defects and openings shall be sealed with hydraulic
cement to the satisfaction of the Township. Flushed material is not
permitted to enter the existing sewer system.
3.
A successful test shall consist of holding a ten-inch Hg vacuum for
a period of one minute with the vacuum pump turned off. The vacuum
line to the testing apparatus must be disconnected from the pump during
the test.
4.
The vacuum may drop a maximum of one inch Hg during the test. A drop
of greater than one inch Hg shall be considered a failure.
5.
The entire manhole shall be tested, including trade rings and frame.
[Ord. 146, 2/18/1992, § 702]
1.
All sewer mains shall be tested for deflection and misalignment using
a hand pulled (go/no go) mandrel. The contractor must submit a notarized
certificate to the Township from the mandrel manufacturer which states
that the mandrel was constructed to allow for a maximum deflection
of 5% in the PVC pipe.
2.
Prior to deflection testing, all sewer lines shall be pressure-jetted
to the satisfaction of the Township. The developer/contractor shall
be responsible for the water source and proper disposal of flushed
material. Flushing of lines by natural gravity flow of water from
a truck or fire hydrant shall not be acceptable. Flushed material
is not permitted to enter an existing active sewer system. After a
section of pipe to be tested has been cleaned to the satisfaction
of the Township, the contractor shall pull the mandrel through the
pipe by hand.
3.
Deflection testing shall not be conducted before 30 days after a
section of pipe between adjacent manholes (including service connections)
has been properly backfilled.
4.
Any section of pipe which will not permit the mandrel to pass through
shall be removed and relaid and/or repaired. The corrected section
shall be retested before and after backfilling to demonstrate that
the pipe meets the maximum allowable deflection specified herein.
[Ord. 146, 2/18/1992, § 704]
1.
Each length of sewer between manholes shall be tested separately
by plugging the open ends of the pipe in each manhole and ends of
each service lateral. Pressure testing shall include all laterals
common to the sewer main being tested. Covers for riser pipes of cleanouts
(at the right-of-way line) shall be weighted down by sandbags heavy
enough to prevent caps from blowing off during testing.
2.
A calibration certificate not more than six months old must be provided
to the Township for all test gauges utilized.
3.
Air from a compressor and control equipment shall be slowly emitted
to the section from one of the manhole plugs until a constant test
pressure of 4.0 psig is maintained.
4.
At this time, the pump shall be turned off and the air supply disconnected
from the line. A one-minute stabilization period shall be maintained
to permit the air temperature of the pipe wall to equalize. After
the stabilization period, the test shall begin, provided that stabilization
pressure does not drop below 3.5 psig (whichever is greater) in a
four-minute test period.
[Ord. 146, 2/18/1992, § 704]
1.
Closed-circuit color television (video) investigation shall be required
on all new sewer lines to be dedicated to the Township.
2.
Video inspection of a sewer main shall not be performed until lines have been satisfactorily pressure-jetted and tested in conformance to the preceding §§ 18-361 through 18-364. Final restoration of existing roadways and construction of new road base/paving shall not occur until video inspection has been accomplished and any defects corrected to the satisfaction of the Township.
3.
No inspection shall be made without the presence of an authorized
Township inspector. Inspection shall be by closed-circuit color television
and shall be performed in one section at a time. Pipelines shall be
clean and dry throughout prior to television investigation. Television
inspection shall be recorded on standard high-quality VHS tape.
4.
The television camera used for inspection shall be especially designed
and constructed for pipeline inspection and shall have its own lighting
system which will produce light levels from 50-1,000 footcandles.
The camera must be capable of 360° viewing so lateral connections
can be observed. Picture quality shall be such as to produce a continuous
six-hundred-line resolution picture showing the entire periphery of
the pipe. To ensure picture stability, equipment used shall be constructed
in such a manner as to withstand shock and vibration.
5.
An inspection record shall be kept which clearly shows exact locations
of the following: points of infiltration, locations of pipe deflection,
damaged locations, locations of lateral connections or any other condition
as required. Stationing shall be measured relative to centers of adjacent
manholes. Measurements shall be made at ground level by means of a
meter device.
6.
The developer/contractor shall keep records of all television investigations
performed. These records shall be on a printed form identifying the
project, contractor's name, date, manhole, and section location,
line size, length of section, known groundwater conditions, weather
conditions and any special remarks concerning condition of the line.
Two signed copies of each with two copies of the videotaping shall
be submitted to the Township upon completion of inspection.
