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allowable rate of leakage shall be less than the number of gallons per <br /> IIIiw hour determined by the following formula: <br /> L = ND x (P)112 <br /> 7400 <br /> L = allowable leakage in gallons per hour <br /> N = number of joints in the section tested <br /> D = nominal diameter of the pipe in inches <br /> P = average test pressure maintained during the leakage test in <br /> pounds per square inch gauge <br /> D. The Contractor must submit his plan for testing to the Engineer for review <br /> at least five (5) working days before starting the test. The Contractor <br /> shall remove and adequately dispose of all blocking material and <br /> equipment after completion and acceptance of the field hydrostatic test, <br /> unless otherwise directed by the Engineer. The Contractor shall repair <br /> any damage to the pipe coating. Lines shall be totally free and clean prior <br /> to final acceptance. <br /> E. The Engineer or his representative must be present during testing. <br /> F. If thrust blocks have been approved for use, thrust blocks shall not be <br /> backfilled until inspected by IRCDUS inspectors. <br /> 13.02 ADDITIONAL PRESSURE TESTING FOR POLYETHYLENE (PE) PIPES <br /> A. At the beginning of the testing period, thoroughly clean all new pipelines <br /> by whatever means necessary, including flushing, to remove all dirt, <br /> stones, pieces of wood, other material that may have entered during the <br /> construction period, and any dirty or discolored water from the lines. If, <br /> after this cleaning, any obstructions remain, they shall be removed. All <br /> debris cleaned from the lines shall be removed from the job site. <br /> B. All PE water mains shall be field-tested. The Contractor shall supply all <br /> labor, equipment, material, gauges, pumps, meters and incidentals <br /> required for testing. The Contractor shall pressure test each water main <br /> upon completion of the pipe laying and backfilling operations, including <br /> placement of any required temporary roadway surfacing. <br /> C. All water mains shall be tested to 150 percent of the operating design <br /> highest point along the test section by a recording type pressure gage <br /> and a copy of the readout shall be submitted to the Engineer upon <br /> completion of the design pressure of the pipe that is 150 psi. The test <br /> pressure shall be measured at the test. All testing shall be conducted in <br /> the presence of the Engineer or a designated representative. <br /> 1% r <br /> 13 - 2 <br />