All extensions to the sanitary sewer system owned and maintained
by the village or a local governing body shall be properly designed
in accordance with and in strict conformance with all requirements
of the New York State Department of Environmental Conservation and
the Albany County Health Department. Plans and specifications for
sewer extensions shall be submitted to and approval obtained from
the local governing body and the New York State Department of Environmental
Conservation and the Albany County Health Department before construction
may proceed. The design of sewers must anticipate and allow for flows
from all possible future extensions or developments within the immediate
drainage area.
Sewer extensions, including individual building sewers from the public sewer to the property line, may be constructed by the local governing body under contract if, in the opinion of the local Village Board, the number of properties to be served by such extension warrants its cost. Under this arrangement, the property owner shall pay for and install the building sewer from the property line to his residence or place of business in accordance with the requirements of Article IV. Property owners may propose sewer extensions within the village by drafting a written petition signed by a majority of the benefiting property owners and filing it with the appropriate Board. The cost of such extensions may be assessed to the benefited property owners in any manner determined by the local Board.
If the local governing body does not elect to construct a sewer extension under public contract, the property owner, builder or developer may construct the necessary sewer extension, if such extension is approved by the local Board in accordance with the requirements of § 94-20. He or they must pay for the entire installation, including all expenses incidental thereto. Each building sewer must be installed and inspected as previously required and the inspection fees shall be paid. Design of the sewer shall be as specified in § 94-23. The installation of the sewer extension must be subject to inspection by the local governing body, and the expenses for this inspection shall be paid for by the owner, builder or developer. The local Board's decision shall be final in matters of quality and methods of construction. The sewer, as constructed, must pass the exfiltration test required in § 94-24 before it is to be used. The cost of sewer extension thus made shall be absorbed by the developers or the property owners, including all building sewers.
A.
Sewer design shall be in accordance with the following provisions.
(1)
All pipe used in construction of a building sewer in a public right-of-way to the owner's property line will be heavy-wall PVC sewer pipe, ASTM D-3034 O.D. SDR 26 wall. The minimum internal pipe diameter will be six inches or equivalent, as determined by the governing body. All pipe used in construction of public sewers will be heavy-wall PVC sewer pipe, ASTM D-3034 O.D. SDR 26 wall. The minimum internal pipe diameter will be eight inches or equivalent, as determined by the governing body. Joints for each kind of pipe shall be designed and manufactured such that O-ring gaskets of the snap-on type are employed. Gaskets shall be continuous, solid, natural or synthetic rubber and shall provide a positive compression seal in the assembled joint such that the requirements of § 94-24 are met. Joint preparation and assembly shall be in accordance with the manufacturer's recommendations. Wye branch fittings shall be installed for connection to building sewers in accordance with § 94-7C.
(2)
Trench widths.
(a)
Trench widths as measured just above the crown of the pipe shall
not exceed the following;
|
Pipe Diameter
(inches)
|
Trench width
| |
|---|---|---|
|
8
|
3 feet 3 inches
| |
|
10
|
3 feet 6 inches
| |
|
12
|
3 feet 9 inches
| |
|
14
|
4 feet 0 inches
|
(b)
If the trench widths are found, during field inspection, to
exceed the limits in the above table, the sewer pipe shall be encased
with a minimum of six inches of concrete.
(3)
Pipe shall be firmly and evenly bedded on a minimum of three inches
of No. 1A or No. 1 crushed stone (NYSDPW specification).
B.
Utilizing the above information, design shall be made as outlined
in Chapter IX of the Water Pollution Control Federation Manual of
Practice No. 9, Design and Construction of Sanitary and Storm Sewers.
C.
Manholes shall be constructed at all changes in slope or alignment
or at intervals not exceeding 400 linear feet. The manholes shall
be constructed with a poured three-thousand-pound-per-square-inch
concrete base 12 inches thick, steel troweled concrete or mortar bench
walls and inverts and precast four-foot-diameter concrete manhole
barrel sections with concentric tapered top section, as specified
by ASTM C-478. The manhole frame and cover shall be the standard design
of the local governing body and shall be set with no fewer than two
courses of brick underneath to allow for later adjustment in elevation.
All joints shall be sealed against infiltration.
A.
All sewers shall satisfy requirements of a final exfiltration test
before they will be approved and sewage flow accepted from them by
the local governing body. This test consists of filling the pipe with
water to provide a head of at least five feet above the top of the
pipe or five feet above groundwater, whichever is higher, at the highest
point of the pipeline under test, and then measuring the loss of water
from the line by the amount which must be added to maintain the original
level. In this test, the line must remain filled with water for at
least 24 hours prior to the taking of measurements. Exfiltration shall
be measured by the drop of water level in a standpipe with closed
bottom end or in one of the sewer manholes available for convenient
measuring.
B.
When a standpipe-and-plug arrangement is used in the upper manhole
of a line under test, there must be some positive method of releasing
entrapped air in the sewer prior to taking measurements. The test
length intervals for either type of test shall be as ordered or approved,
but in no event shall they exceed 1,000 feet. In the case of sewer
laid on steep grades, the length of line to be tested for exfiltration
at any one time may be limited by the maximum allowable internal pressure
on the pipe and joints at the lower end of the line. The test period
wherein the measurements are taken shall not be less than two hours
in either type of test.
C.
The total leakage of any section tested shall not exceed the rate
of 100 gallons per mile of pipe per 24 hours per inch of nominal pipe
diameter. For purposes of determining the maximum allowable leakage,
manholes shall be considered as sections of forty-eight-inch-diameter
pipe five feet long. The equivalent leakage allowance shall be 4.5
gallons per manhole per 24 hours for forty-eight-inch-diameter manholes.
If leakage exceeds the specified amount, the necessary repairs or
replacements required shall be made to permanently reduce the leakage
to within the specified limit, and the tests shall be repeated until
the leakage requirement is met.
All sewer extensions constructed at the property owner's,
builder's or developer's expense, after final approval and
acceptance by the local Board, shall become the property of and shall
thereafter be maintained by the local governing body. Said sewers,
after their acceptance by the local governing body, shall be guaranteed
against defects in materials and workmanship for 18 months. The guaranty
shall be in a form provided for by the local governing body. At the
sole discretion of the local Board, a completion bond or certified
check may be demanded as part of the guaranty. In order to obtain
final approval and acceptance by the local governing body, the owner,
builder or developer must provide as-built plans of the sewer line
construction, including ties to the property line of the wye for sewer
laterals and the public sewer and the end of the building sewer at
the property line.
No builder or developer shall be issued a building permit for
a new dwelling or structure requiring sanitary facilities unless a
suitable and approved method of waste disposal is proposed. All new
developments shall be provided with an approved system of sanitary
sewers.
