All extensions to the sanitary sewer system owned and maintained by the town 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 Town Engineer 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.
A. 
Sewer extensions, including individual building sewer laterals from the public sewer to the property line, may be constructed by the town under public contract or town forces if, in the opinion of the Town 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 lateral from the property line to his or her residence or place of business in accordance with the requirements of Article IV.
B. 
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 Town Board. The cost of such extensions may be assessed to the benefited property owners in any manner determined by the Town Board.
A. 
Approval by Town Board. If the town 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 Town Board in accordance with requirements of § 118-24. He or she or they must pay for the entire installation, including all expenses incidental thereto.
B. 
Inspection of building sewer. Each building sewer so installed must be installed and inspected as previously required, and inspection fees as determined by the Town Board shall be paid. The design of sewers shall be as specified in § 118-27 and approved by Town Engineer.
C. 
Inspection of sewer extension. The installation of the sewer extension must be subject to periodic inspection by the Town Engineer, and the expenses for this inspection shall be paid for by the owner, builder or developer. The Town Engineer's decisions shall be final in matters of quality and methods of construction.
D. 
Exfiltration test. The sewer, as constructed, must pass the exfiltration test required in § 118-28 before it is to be used.
E. 
Cost to be borne by developers or owners. The cost of sewer extensions thus made shall be absorbed by the developers or the property owners, including all building sewers.
A. 
Sewer design. Sewer design shall be in accordance with the following provisions:
(1) 
Pipe shall be SDR 35 PVC or SDR 21 PVC.
(2) 
No standard strength clay pipe or unreinforced concrete pipe shall be used.
(3) 
Minimum internal pipe diameter shall be eight inches.
(4) 
Joints for each kind of pipe shall be designed and manufactured such that "O" ring gaskets of the snap-on-type are employed.
(5) 
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 § 118-28 are met.
(6) 
Joint preparation and assembly shall be in accordance with the manufacturer's recommendations.
(7) 
Wye branch fittings shall be installed for connection to building sewers in accordance with § 118-12.
(8) 
Trench widths as measured just above the crown of the pipe shall not exceed the following:
Pipe Diameter
(inches)
Trench Width
(inches)
8
39
10
42
12
45
14
48
B. 
Excessive trench widths. 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 or a higher strength class pipe shall be used. All pipe shall be firmly and evenly bedded on a minimum of three inches of No. A or No. 1 crushed stone (NYSDT Specification). Pipe thickness and field strength shall be calculated on the following criteria:
(1) 
Safety factor shall be 1.5.
(2) 
Load factor shall be 1.7.
(3) 
Weight of soil shall be 120 pounds/cubic feet.
(4) 
Wheel loading shall be 16,000 pounds.
C. 
Compliance with Manual of Practice No. 9. Utilizing the above information, the 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.
D. 
Manholes. Manholes shall be constructed at all changes in slope or alignment or at intervals not exceeding 350 linear feet. The manholes shall be constructed with a poured 4,000 pounds per square inch concrete base 12 inches thick, steel-troweled concrete or mortar bench wall 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 town and shall be set with no less 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. The minimum clear openings in all manholes, excepting shallow manholes, shall be 24 inches.
A. 
Test required before acceptance. All sewers satisfy requirements of a final exfiltration test before they will be approved and sewage flow accepted from them by the town. 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 pipe line 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 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. 
Methods of testing; test periods. 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 1,500 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. 
Maximum leakage. 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 Town Engineer, shall become the property of the town and shall thereafter be maintained by the town. Said sewers and 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 for by the town. The town will require a completion bond or certified check 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 a suitable and approved method of waste disposal is proposed. All new developments shall be provided with an approved system of sanitary sewers, unless otherwise permitted by the Town Board and the appropriate Department of Health or its authorized representative.
In all sewer construction of lateral extensions, manholes, etc., an engineering drawing or a plan approved by the Town Engineer or Sewer Superintendent showing accurately the location, depth and length of and materials used for the new construction shall be required.