The size, slope, alignment, jointing of pipe, materials of construction,
etc., for sewer system extensions, including construction methods, excavation
and backfill for sewer system extensions, shall be subject to approval by
the Board of Selectmen or its designated agent. Detailed plans and specifications
shall be submitted for the town's approval prior to construction. Leakage
testing and deflection testing will be performed on all sewer system extensions
(as appropriate).
Leakage testing will be performed on all town sewer extensions and may
be performed on industrial or commercial connections, depending on waste composition,
at the discretion of the Board of Selectmen in accordance with these regulations.
Leakage tests shall be made in accordance with the town's standard method
for sanitary sewer testing. No building shall be connected to a newly installed
sewer until such time as the sewer has been satisfactorily tested. Testing
shall be carried out by the contractor for a minimum of four hours under the
supervision of the town or its designated agent.
A. The maximum acceptable loss, through either infiltration
or exfiltration, shall not exceed 200 gallons per mile per 24 hours per inch
of diameter of the pipe tested. When two or more pipeline sections are tested
at the same time, the allowable loss is for the entire length being tested.
Losses through manholes shall be included in determining the loss in a line.
B. In case leakage exceeds the above-specified amount, the
contractor shall locate the leaks and shall repair them at the owner's
expense. Method of repair, if necessary, shall be subject to approval by the
town.
C. After repairs have been made, the line shall be retested
and the process of repairing and retesting shall be repeated until results
within the above-specified limits are obtained.
Deflection tests will be performed on all PVC and ABS sewer extensions
and may be performed on PVC and ABS building connections at the direction
of the Board of Selectmen. The test will consist of a five-percent GO, NO-GO
deflection test after the pipe to be tested has been in the ground at least
90 days. The deflection test shall be done with an instrument provided for
by the pipe manufacturer, approved by the Board of Selectmen or its authorized
agent, and conducted in the presence of the town's authorized agent.
Any system which fails the five-percent deflection test may, at the discretion
of the Board of Selectmen, be ordered to be excavated, replaced and retested.