All extensions to the sanitary sewer system owned and maintained by the Town shall be properly designed in accordance with and in strict conformance with all requirements of the New York State Department of Environmental Conservation. Plans and specifications for sewer extensions shall be submitted to and approval obtained from the New York State Department of Environmental Conservation or 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 Board under public contract if, in the opinion of the 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 Town by drafting a written petition signed by a majority of the benefiting property owners and filing it with the Board. The cost of such extensions may be assessed to the benefited property owners pursuant to applicable law.
If the Board 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 in accordance with the requirements of § 116-27. 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 sewers shall be as specified in § 116-30. The installation of the sewer extension must be subject to periodic inspection by the Board, and expenses for this inspection shall be paid for by the owner, builder or developer. The Board's decisions shall be final in matters of quality and methods of construction. The sewer, as constructed, must pass the exfiltration test required in § 116-31 before it is to be used.
Main line sewer design shall be in accordance with the following provisions:
A. 
Pipe material shall be asbestos-cement pipe conforming to ASTM Specification C-428, Type 11, or polyvinyl chloride pipe conforming to ASTM Specification D-3034. Minimum internal pipe diameter shall be eight inches. Joints for each type of pipe shall be designed and manufactured such that O-ring gaskets of the snap-on type are employed. Gaskets shall be continuous, solid neoprene and shall provide a positive compression seal in the assembled joint such that the requirements of § 116-31 are met. Y-branch fittings shall be installed for connection to building sewers in accordance with § 116-13.
B. 
Pipe thicknesses and field strengths shall be calculated using the following criteria:
(1) 
The safety factor shall be 1.5.
(2) 
The load factor shall be 1.5.
(3) 
The weight of soil shall be 120 pounds per cubic foot.
(4) 
The wheel loading shall be 16,000 pounds.
C. 
The transition width shall be used in conjunction with the above to compute pipe class for asbestos cement pipe. Polyvinyl chloride pipe shall have wall thickness equal to or greater than those provided by a SDR ratio of 35.
D. 
Utilizing the above information, design shall then 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.
E. 
Manholes shall be constructed at all changes in slope or alignment or at intervals not exceeding 400 linear feet. The manholes shall have a precast minimum four-foot diameter concrete manhold barrel section with an eccentric tapered top section and a base section as specified by ASTM C-478. The manhole frame and cover shall be the standard design of the Town and shall be set with no less than two courses of brick underneath to allow later adjustment in elevation. All joints shall be sealed with O-rings against infiltration.
A. 
All sewer extensions shall satisfy requirements of a final exfiltration test before they will be approved and sewage flow accepted from them by the Board. 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 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. 
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 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.
D. 
Other forms of sewer testing may be permitted subject to the approval of the Board and New York State Department of Environmental Conservation standards.
All sewer extensions constructed at the property owner's, builder's or developer's expense, after final approval and acceptance by the Board, shall become the property of the Town and shall thereafter be maintained by the Town. Said sewers, after their acceptance by the Town, shall be guaranteed against defects in materials or workmanship for 18 months. The guaranty shall be in a form provided by the Town. At the sole discretion of the Town, a completion bond or other security 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 Town unless suitable and approved method of waste disposal is proposed. Approval shall be by the County Health Department.