No unauthorized person shall uncover, make any
connections with or opening into, use, alter, or disturb any public
sewer or appurtenance thereof without first obtaining a wastewater
discharge permit. Any person proposing a new discharge into the system
or a substantial change in the volume or character of pollutants that
are being discharged into the system shall notify the Town at least
60 days prior to the proposed change or connection. Proposed new discharges
from residential or commercial sources involving loading exceeding
50 population equivalent or any increase in industrial discharges
must be approved by the New Hampshire Water Supply and Pollution Control
Division. A discharge permit request must be filed by the Derry Wastewater
Division on behalf of the applicant.
There shall be two classes of sewer permits,
one for residential and commercial users and one for industrial users.
In either case, the owner shall supply plans and specifications to
the Director considered pertinent by the Director to the proposed
sewer service. The permit application should be in the form as attached
in Appendix D. A permit and inspection fee pursuant to §§
122-57 and
122-58 and Appendix A shall be paid to the Tax Collector's office at the time of the application and submittal to the Director for approval. An accessibility fee shall be charged pursuant to §
122-54 and Appendix A on all new and expanding discharges as well.
A separate and independent building sewer shall
be provided for every building, except that where one building stands
at the rear of another on an interior lot and no private sewer is
available or can be constructed to the rear building through an adjoining
alley, court, yard, or driveway, the building sewer from the front
building may be extended to the rear building and the whole considered
as one building sewer.
Old building sewers may be used in connection
with new buildings only when they are found, on examination and test
by the Director, to meet all requirements of this chapter.
The size and slope of the building sewer shall
be subject to the approval of the Director, but in no event shall
the diameter be less than six inches. The slope of such six-inch pipe
shall be not less than 1/8 inch per foot.
Whenever practical, the building sewer shall
be brought to the building at an elevation below the basement floor.
No building sewer shall be laid parallel to or within three feet of
any bearing wall which might thereby be weakened. The depth shall
be sufficient to afford protection from frost. The building sewer
shall be laid at uniform grade and in straight alignment insofar as
possible. Changes in direction shall be made only with properly curved
pipe and fittings. In no case will more than one change of direction,
up to 45º, be made without suitable cleanouts installed, as detailed
in the approved "Sewer and Water Service Connection Specifications"
dated April 1993 or the latest revision thereof.
In all buildings in which any building sewer
is too low to permit gravity flow to the public sewer, sanitary sewage
carried by such sewer shall be lifted by approved artificial means
and discharged to the building sewer. Such means are to be constructed
as detailed in the approved "Sewer and Water Service Connection Specifications"
dated April 1993 or the latest revision thereof.
All excavations required for the installation
of a building sewer shall be open trench work unless otherwise approved
by the Director. Pipe laying and backfill shall be performed in accordance
with ASTM specifications (c12-19), except that no backfill shall be
placed until the work has been inspected.
All joints and connections shall be made gastight
and watertight and of a type approved by the Director. All joints
must be constructed so as to pass a standard air-pressure test of
between 305 psig and held for five minutes with a maximum one psig
loss of pressure.
The applicant for the building sewer permit
shall notify the Director when the building sewer is ready for inspection
and connection to the public sewer. The connection shall be made under
the supervision of the Director or his representative.
All excavations for building sewer installation
shall be adequately guarded with barricades and lights so as to protect
the public from hazard. Streets, sidewalks, parkways and other public
property disturbed in the course of the work shall be restored in
a manner satisfactory to the Town. Open trenches shall not be left
unattended.
The property owner is obligated to pay for repairs
and maintenance of the building sewer from his building to the public
sewer, including repair of the entire tee-wye and/or tee assembly
installed in the public sewer main. The Town shall have the right
to charge reasonable fees for a repair requiring excavation of the
street to expose and repair a building sewer, such fee to be payable
in advance of the excavation work. If it is determined by the Director
that the Town is responsible for the blockage which occurred in the
sewer main, then the fee will be refunded.
Building sewer must be installed as required in this Article
IV and as detailed in the approved "Sewer and Water Connection Specifications" dated April 1993 or latest revision thereof and as further required in §
122-7 of this chapter.
The Town may request the right to install exterior building sewer cleanout assemblies in existing building sewers to be used for inspection and maintenance purposes. Costs for such work will be paid by the Town. If, after installation of the building sewer cleanout assemblies, future internal inspection reveals that repairs are necessary in the building sewer, then the building sewer repairs shall be paid in accordance with §
122-26.