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I <br />s <br />E. The Engineer or the Engineer's representative must be present during <br />testing. <br />F. No thrust blocks shall be backfilled until inspected by IRCDUS <br />inspectors. <br />1. . <br />J G. Before the pressure testing of new pipelines against existing Indian River <br />County valves can commence, the lines shall be properly chlorinated, <br />sampled, and bacteriologically approved. <br />1.02 DISINFECTING POTABLE WATER PIPELINES <br />A. Before being placed in service, all potable water pipelines shall be <br />chlorinated in accordance with the latest edition of AWWA C-551, <br />"Standard Procedure for Disinfecting Water Mains," The procedure shall <br />be approved by the Engineer. The location of the chlorination and <br />sampling points will be as specified by the Florida Department of <br />Environmental Protection, Water Distribution System Permit. Taps for <br />chlorination and sampling shall be uncovered and backfilled by the <br />Contractor, as required. <br />B. The general procedure for chlorination shall be first to flush all dirty or <br />discolored water from the lines, and then introduce chlorine in approved <br />dosages in accordance with Table 1-1 through a tap at one end, while <br />water is being withdrawn at the other end of the line. All water flushed <br />from mains shall be directed into rear or side yard ditches. The chlorine <br />solution shall remain in the pipeline for no less than 24 hours. <br />[,. Following the chlorination period, all treated water shall be flushed from <br />the lines at their extremities and replaced with water from the distribution <br />system. Bacteriological sampling and analysis of the replacement water <br />shall then be made by the Engineer in full accordance with the AWWA <br />Manual M23. The Contractor will be required to rechlorinate, if <br />necessary. The line shall not be placed in service until the requirements of <br />the State and County Environmental Health Department are met. <br />D. Special disinfection procedures shall be used in conutections with exis6119 <br />mains, and where the method outlined above is not practical. <br />E. The Contractor shall make all arrangements necessary with an <br />independent commercial laboratory approved by the Department of Health <br />t and Rehabilitative Services (HRS) for the collection and examination of <br />samples of water from disinfected water mains. These samples shall be <br />examined for compliance with HRS requirements. Sampling; shall be <br />02660-2 <br />A <br />i� <br />