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• <br />leakage shall be repaired to the satisfaction of the Engineer and the test <br />repeated or extended for an additional period up to the full test time will) <br />suitable adjustment for previous snake -up water used, at the Engineer's <br />discretion. <br />1i`. During testing at pressures in excess or loo prig., all corporation slops not <br />connected to services shall be sealed with appropriate screwed caps or plugs. All <br />service corporation stops shall be left open and the services tested against closed <br />curb stops. <br />1'.. The pumping/pressurizing and make-up water measuring equipment shall be <br />provided by the Contractor and approved by the Engineer prior to testing. The <br />pressurizing equipment shall be designed and operated in a manner that will <br />minimize pressure surging and pulsing within the pipe. <br />C. The Contractor shall provide and install a temporary valved tap with a 1/4" <br />FPT connection to receive the pressure gauge in each pipe run to be tested. <br />Upon satisfactory completion of testing, the Contractor shall remove and plug the <br />pipe. <br />H. In preparation for testing, the pipe shall be slowly filled with clean water from an <br />approved source, taking care to purge all air pockets. Water remaining in the <br />pipe system after flushing may be used and supplemented as necessary with <br />prior approval by the Engineer, and clean test water may be reused for <br />sequential testing of pipe segments. <br />1. In conducting the test, water shall be pumped into the full pipe until test <br />pressure is attained, and makeup water shall be added as soon as the <br />pressure drops to 5 psi below test pressure. All make-up water shrill be <br />accurately measured, and the total test leakage shall be derived as the volume of <br />make-up water added. <br />L 'Should the tested section fail to meet these requirements, tite Contractor <br />shall, at his own expense, locate and repair the defects and relest the section <br />until it is acceptable. <br />K. Where any section of pipe is provided with concrete thrust blocking, the <br />hydrostatic pressure test shall not be made until at least seven days after the <br />concrete was placed except if high early -strength ccnte.nt is used. in which case <br />the hydrostatic pressure test shall not be made until .il least three days have <br />elapsed. <br />1.1. Immediately upon completion Of - lutstiitig, lKestlow 9'. +"I'v" shall he <br />operated to insure their full opening and closing. <br />5. DISINFECTION <br />A. Upon satisfactory completion of pressure and leakage testing, all newly <br />installed pipe, services, and hydrants shall be disinfected by introduction of a <br />ronrentrated solutinn of calcinm hypochlorite or sodittra I-ypochlorite, along <br />with sufficient potable wetter to till the pipe system, until a ffcc residual <br />chlorine concenttati-on cf 200 tutlt i:: obtailted [ltrough.fut tlW The <br />IM <br />