2006-377 - Laserfiche WebLink

Home Browse Search

D . Testing shall be conducted after backfilling has been completed and before placement of permanent surface. E . Allowable amount of makeup water for expansion during the pressure test of the pipe shall conform to Plastic Pipe Institute (PPI ) Handbook of Polyethylene Pipe ; Inspection , Tests , and Safety Considerations , unless otherwise approved by the Engineer. The Operating Safety Considerations, Post Installation , Hydrostatic Testing , Monitored Make-up Water Test, Table III , is on Pages 24 and 25 of the Handbook. F . In any test of pipe laid disclosed leakage or significant pressure drop greater than the allowed , the Contractor shall , at its own expense , locate and repair the cause of leakage and retest the line . The amount of leakage that may be permitted shall be in accordance with AWWA Standard Specifications. ' G . All visible leaks are to be repaired regardless of the amount of leakage. H . The Contractor must submit his plan for testing to the Engineer-of-Record " and Utility Inspector for review at least ten ( 10 ) days before starting the test. 10.03 DISINFECTING POTABLE WATER PIPELINES A. Before being placed in service, all potable water pipelines shall be disinfected in accordance with AWWA Standard Specifications C-651 -99 , or latest revision . The location of the chlorination and sampling points will be as shown on the drawings. The Contractor shall uncover and backfill taps for chlorination and sampling , as required . B . The general procedure for chlorination shall be first to flush all dirty or discolored water from the lines, and then introduce chlorine in approved r dosages in accordance with Table 10- 1 through a tap at one end , while water is being withdrawn at the other end of the line . The chlorine solutions shall remain in the pipeline for no less than 24 hours . r C . The use of chlorine tablets is strictly prohibited . D . f=ollowing the chlorination period , all treated water shall be flushed from the fines at their extremities and replaced with water from the distribution system . The Contractor's lab shall then make bacteriological sampling ,. and analysis of the replacement water in full accordance with AWWA Standard Specifications C-651 , or latest revision . The Contractor will be required to re-chlorinate , if necessary . The line shall not be placed in service until all the requirements of the State and County Environmental Health Departments are met. E . Special disinfecting procedures shall be used in connections to existing mains where the method outlined above is not practical 10 -