The size, slope, alignment, jointing of pipe, materials of construction, etc., for sewer system extensions, including construction methods, excavation and backfill for sewer system extensions, shall be subject to approval by the Board of Selectmen or its designated agent. Detailed plans and specifications shall be submitted for the town's approval prior to construction. Leakage testing and deflection testing will be performed on all sewer system extensions (as appropriate).
Leakage testing will be performed on all town sewer extensions and may be performed on industrial or commercial connections, depending on waste composition, at the discretion of the Board of Selectmen in accordance with these regulations. Leakage tests shall be made in accordance with the town's standard method for sanitary sewer testing. No building shall be connected to a newly installed sewer until such time as the sewer has been satisfactorily tested. Testing shall be carried out by the contractor for a minimum of four hours under the supervision of the town or its designated agent.
A. The maximum acceptable loss, through either infiltration or exfiltration, shall not exceed 200 gallons per mile per 24 hours per inch of diameter of the pipe tested. When two or more pipeline sections are tested at the same time, the allowable loss is for the entire length being tested. Losses through manholes shall be included in determining the loss in a line.
B. In case leakage exceeds the above-specified amount, the contractor shall locate the leaks and shall repair them at the owner's expense. Method of repair, if necessary, shall be subject to approval by the town.
C. After repairs have been made, the line shall be retested and the process of repairing and retesting shall be repeated until results within the above-specified limits are obtained.
Deflection tests will be performed on all PVC and ABS sewer extensions and may be performed on PVC and ABS building connections at the direction of the Board of Selectmen. The test will consist of a five-percent GO, NO-GO deflection test after the pipe to be tested has been in the ground at least 90 days. The deflection test shall be done with an instrument provided for by the pipe manufacturer, approved by the Board of Selectmen or its authorized agent, and conducted in the presence of the town's authorized agent. Any system which fails the five-percent deflection test may, at the discretion of the Board of Selectmen, be ordered to be excavated, replaced and retested.