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from the piping and equipment. Clean and flush all piping using pota <br />Sufficient flushing water and pigging shall be introduced into the <br />produce a discharge that is clear with no evidence of silt or foreig <br />visible. Contractor to provide means of discharging and disposing • <br />Contractor's expense. <br />C. Pressure testing ductile iron piping systems: <br />1. The test pressure for the water piping, irrigation quality water <br />force main piping systems constructed of ductile iron shall <br />and this pressure shall be maintained for a period of not les <br />hours. Tests shall be made between valves and as far as <br />and as approved by the Engineer. Potable water from the <br />system shall be used. Pressure shall not vary more than five <br />piping during the test periods or as approved by the Engineer. <br />leakage shall be computed on the basis of AWWA C-600. <br />2. All leaks evident at the surface shall be uncovered an <br />regardless of the total leakage as indicated by the test, an <br />valves and fittings and other materials found defective and <br />shall be removed and replaced at the Contractor's expense. <br />be repeated until leakage has been reduced below the <br />amount. <br />3. In the judgment of the Engineer, should it not be practical t <br />foregoing procedures exactly for any reason, modificati <br />procedure shall be made as approved by the Engineer. In an <br />Contractor shall be responsible for the ultimate water tight <br />piping within the preceding requirements. <br />. <br />3.03 DISINFECTION <br />• <br />• <br />• <br />• <br />. <br />. <br />. <br />A. The Contractor shall furnish and install suitable temporary connect <br />piping, all necessary pressure pumps, hose, pipe connections, met= <br />and other similar equipment, and all labor required, all without <br />compensation for the disinfection of all required piping systems. <br />shall be conducted on the following systems: <br />1. Water main piping and valves. <br />B. Conform to AWWA Standards and as modified herein. <br />C. Maintain disinfectant for a minimum of 8 hours in such a manner th <br />system will be filled with water containing a minimum chlorine conc <br />50 ppm at any point. <br />D. After the disinfecting agents have been permitted to remain for th <br />contact periods, the water lines, and valves shall be thoroughly fl <br />water until the residual chlorine tests are less than 2 PPM in eac <br />The determination of the amount of residual chlorine in the syst: <br />made at such points and in accord with standard tests by means of <br />orthotolodine test set. <br />3.04 BACTERIOLOGICAL SAMPLING <br />1 <br />01025-23 Technical Specifi <br />0111 -lir Minrlre FAI(2IAIFFf71A1(2. fIVlcl(KI FDPC IFCTc\1'21d-1n7th Awa MIIIinn Qnth St to Qdth ct\Arimin\hiri rinriimpntc <br />• le water. <br />piping to <br />matter is <br />f water at <br />iping, and <br />e 150 psi <br />than two <br />racticable <br />istribution <br />(5) psi for <br />Allowable <br />repaired <br />all pipes, <br />r the test <br />ests shall <br />allowable <br />follow the <br />ns in the <br />event, the <br />ess of the <br />ons to the <br />rs, gauges <br />additional <br />isinfection <br />t the entire <br />ntration of <br />specified <br />ushed with <br />instance. <br />m shall be <br />a standard <br />ations <br />Mactar (;nntrart <br />