No person shall uncover, make any connections with or opening
into, use, alter or disturb any public sewer or appurtenance thereof
without first obtaining a written permit from the Town Board or the
AHJ.
There shall be two classes of building sewer permits: for residential
and commercial service and for service to establishments producing
industrial wastes. In either case, the owner or his agent shall make
application on a special form furnished by the Town. The permit application
shall be supplemented by any plans, specifications or other information
considered pertinent in the judgment of the Town Engineer. A permit
and inspection fee shall be paid to the Town Clerk at the time an
application is filed, such fees being established by resolution of
the Town Board.
A separate and independent building sewer shall be provided
for every building. Where building sewers are to serve multiple-dwelling
structures, there shall be provided at least one separate building
sewer for each group of eight apartments (or less).
Existing building sewers may be used in connection with new
buildings only when they are found, on examination and test for the
Town, to meet all requirements of this Part 3.
Building and street lateral pipe materials shall be one of the
following:
A. Tar-coated, service grade, ductile iron soil pipe conforming to ASTM
Specification A-74, Ductile Iron Soil Pipe and Fittings. All dimensions,
weights, and markings of the pipe shall conform to the requirements
of ANSI Designation A112.5.1, except spigot ends shall be "plain end"
if gasket joints are used.
B. Polyvinyl chloride (PVC) pipe and fittings conforming to ASTM Specifications
D3034-85b, Type PSM Polyvinyl Chloride (PVC) Sewer Pipe and Fittings
or ASTM F789-85, Type PS-46 Poly (Vinyl Chloride) (PVC) Plastic Gravity
Flow Sewer Pipe and Fittings. All pipe shall be suitable for gravity
sewer service. Provisions shall be made for contraction and expansion
at each joint with a rubber ring. The bell shall consist of an integral
wall section stiffened with two PVC retainer rings which securely
lock the solid cross-section ring into position. Minimum pipe stiffness
(F/(
)y) at five-percent
deflection shall be 46 psi when tested in accordance with ASTM Specification
D2412.
C. Any part of the building or street lateral that is located within
five feet of a water main or water service shall be constructed of
ductile iron soil pipe encased in concrete and may be required by
the Town where the building or street lateral is likely to be damaged
by tree roots. If installed on fill or unstable ground, the building
or street lateral shall be of ductile iron soil pipe, although other
pipe material may be permitted if such pipe is uniformly supported
on a poured concrete cradle approved by the Town. The distance between
consecutive joints, as measured along the center line of the installed
pipe, shall not exceed 10 feet, except under abnormal circumstances,
in which case this dimension may be exceeded if approved by the Town.
The size and slope of building or street laterals shall be subject
to approval by the Town, but in no event shall the internal diameter
be less than four inches, nor shall the slope of the pipe be less
than 1/4 inch per foot.
At the point of connection of a street lateral to a main sewer,
a standard wye fitting and sufficient one-eighth (45°) bend fittings
shall be used. The wye fittings shall be installed so that flow in
the "arm" shall transition smoothly into the flow in the public sewer.
No lateral connection shall be made to the public sewer which permits
the flow into the public sewer from the lateral to enter at right
angles.
The size and slope of the building sewer shall be subject to
the approval of the Town, but in no event shall the diameter be less
than four inches, nor shall the slope of the pipe be less than 1/4
inch per foot.
The building sewer shall be brought to the building at an elevation
as approved by the AHJ. No building sewer shall be laid parallel to
and within three feet of any bearing wall which might thereby be weakened.
The depth shall be sufficient to afford protection from frost, but
in no event shall be less than four feet. 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. The ends of the building sewers which are not connected
to the building drain of the structure for any reason shall be sealed
against infiltration by a suitable stopper, plug or other approved
means.
In all buildings in which any building drain is too low to permit gravity flow to the public sewer, sewage carried by such drain shall be lifted by approved mechanical means and discharged to the building sewer, except where a permit has been granted to the contrary under the provisions of Article
XIV.
All excavations required for the installation of a building
sewer shall be open trench work unless otherwise approved by the Town.
Pipelaying and backfill shall be performed in accordance with Sections
3 through 6 of ASTM Specification C12, except that no backfill shall
be placed until the work has been inspected.
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.
When any building sewer is to serve a school, hospital or similar institutional or public building, or is to serve a complex of industrial or commercial buildings, or which, in the opinion of the Town, will receive sewage or industrial wastes of such volume or character that frequent maintenance of said building sewer is anticipated, then such building sewer shall be connected to the public sewer through a manhole. The Town shall determine if and where this type of connection to the public sewer is required. Connections to existing manholes shall be made as directed by the Town. If required, a new manhole shall be installed in the public sewer pursuant to §
102-100, and the building sewer connection made thereto as directed by the Town.