A.
Pipe and fittings to be used in the work shall be either
cement-lined cast or ductile iron, polyvinyl chloride (PVC) or Acrylonitrite-Butadiene-Styrene
(ABS) composite or solid wall pipe of approved strength and with approved
joints. Pipe shall be a minimum of four inches in diameter for a single-family
home and a minimum of six inches in diameter for all other building categories.
B.
Joints for cement-lined cast iron, PVC or ABS shall conform
to the manufacturer's specifications and are subject to approval by the
town or its designated agent.
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.
A.
In general, sewer services will not be allowed to have
more than two angle points or a total angular deviation of 180°. Cleanouts
shall be installed at each deflection.
B.
All services shall be laid in an envelope of sand or
other approved material, depending on soil conditions, with not less than
six inches of said material well compacted under and all around the barrel
of the pipe.
C.
All pipe and fittings shall be laid to a minimum slope
of 1/4 inch per foot.
D.
In general, the trenches shall be excavated from the
end of the existing sewer service to its point of connection to the building
plumbing outlet before backfilling any pipe beyond the sand envelope.
E.
Services in excess of 100 feet in length are subject
to special review by the Board of Selectmen or its authorized representative
and such other requirements as may be found necessary to assure a functional
connection.
F.
In new construction, and where practicable in existing
building when the common sewer is sufficiently deep, service shall be laid
directly, without deflections from the house plumbing vent stack to the connection
provided at the public sewer.
G.
Tunneling will not be allowed unless special permission
for the same is given.
H.
Connection made to the building plumbing system shall
be upstream of any septic tanks or cesspools.
I.
Upon connection to the sanitary sewer, any septic tanks,
cesspools or similar private septic disposal facilities shall be demolished
or abandoned and filled with suitable material by the drainlayer.
J.
Pipe and fittings shall not be backfilled beyond the
sand envelope until the work is inspected and approved by the Board of Selectmen
or its designated agent.
K.
The licensed drainlayer shall be responsible for all
defects in materials and workmanship for a period of one year following completion
of the sewer service installation.
L.
When ledge is encountered in the excavations, a permit
must be obtained from the Fire Chief for the use of explosives.
M.
All blasting shall be done in accordance with the requirements
of the Massachusetts Department of Public Safety and such other requirements
as imposed by the Fire Chief. All blasting must be done by a person licensed
by the Department of Public Safety for this purpose.
