(a) After hydrostatic testing, the new line shall be thoroughly flushed and drained. The main shall be flushed through the hydrants or by some other approved means. Each valved section of new pipe shall be flushed and chlorinated independently.
(b) After flushing and draining, the pipe shall be filled again at a slow rate and chlorine shall be added in such a manner as to insure uniform mixing and distribution of the chlorine with the water. Chlorine shall be added at such rates as to give a minimum chlorine dosage of fifty parts per million available chlorine. Chlorine shall be admitted into the line through corporation cocks. Chlorine used as a disinfecting agent may be either liquid chlorine or an anhydrous calcium hypochlorite compound such as “HTH” or an approved equal. Liquid chlorine shall be applied through a suitable chlorine feeding machine and injection nozzle. Anhydrous calcium hypochlorite shall be fed as a solution using a suitable injection pump.
(c) The pipe line shall be completely filled with chlorine solution and shall remain in the pipe line for a period of twenty-four hours.
(d) Following the twenty-four hour disinfecting period, the line shall be thoroughly flushed until the replacement water throughout the entire length of the line shall, upon test both chemically and bacteriologically, be proven equal to the quality of water in the existing system. (Ord. 352. Passed 10-22-62.)