All extensions to the sanitary sewer system owned and maintained by
the City shall be properly designed in accordance with the Recommended Standards
for Sewage Works, as adopted by the Great Lakes-Upper Mississippi River Board
of State Sanitary Engineers, and in strict conformance with all requirements
of the New York State Department of Health. Plans and specifications for sewer
extensions shall be submitted to and approval obtained from the Superintendent
and the New York State Department of Health 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 City under public contract if, in the opinion of the Board of Public Works, 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 incorporated City by drafting extensions within the incorporated City by drafting a written petition, signed by a majority of the benefiting property owners, and filing it with the Board of Public Works. The cost of such extensions may be assessed to the benefited property owners in any manner determined by the Board of Public Works.
If the City 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 Board of Public Works in accordance with the requirements of § 252-48. He or they must pay for the entire installation, including all expenses incidental thereto. Each building sewer installed must be installed and inspected as previously required, and the inspection fees shall be paid. Design of sewers shall be as specified in § 252-51.
A.Â
The installation of the sewer extension must be subject to periodic inspection by the Plumbing Inspector, and the expenses for this inspection shall be paid for by the owner, builder or developer. The Plumbing Inspector's decisions shall be final in matters of quality and methods of construction. The sewer as constructed, must pass the exfiltration test required in § 252-52 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. Sewer design shall be in accordance with the following provisions. Pipe material shall be either asbestos-cement conforming to ASTM Specification C-428, Type II; extra-strength vitrified clay conforming to ASTM Specification C-200; or reinforced concrete conforming to ASTM Specification C-76. No standard strength clay pipe or nonreinforced concrete pipe shall be used. Minimum internal diameter shall be eight inches. Joints for each kind of pipe shall be designed and manufactured such that O-ring gaskets of the snap-on type are employed.
B.Â
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 § 252-52 are met. Joint preparation and assembly shall be in accordance with the manufacturer's recommendations. Y-branch fittings shall be installed for connection to building sewers in accordance with § 252-17. 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
|
C.Â
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. Pipe shall be firmly and evenly bedded
on a minimum of three inches of No. 1A or 1 crushed stone (New York State
Department of Public Works specification).
D.Â
Manholes shall be constructed at all changes in slopes
or alignment or at intervals not exceeding 300 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 sections, as specified by ASTM C-478. The manhole frame and cover
shall be the standard design of the City 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. No manholes shall be constructed
with steps or ladder rungs.
A.Â
All sewers shall satisfy requirements of a final exfiltration
test before they will be approved and sewage flow accepted from them by the
City. 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 a closed
bottom end or in one of the sewer manholes available for convenient measuring.
B.Â
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 sewers laid on
steep grades, the length of line to be tested by 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.Â
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 Board
of Public Works, shall become the property of the City and shall thereafter
be maintained by the City. Said sewers, after their acceptance by the City,
shall be guaranteed against defects in materials or workmanship for 18 months.
The guaranty shall be in a form provided for by the City. At the sole discretion
of the City, a completion bond or certified check may be demanded as part
of the guaranty.
No builder or developer shall be issued a building permit for a new
dwelling or structure requiring sanitary facilities within the City unless
a suitable and approved method of waste disposal is proposed. All new developments
shall be provided with an approved system of sanitary sewers.
