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SECTION 5 – WATER WORKS <br />82 <br />All hydrants, main line valves, and hydrant valves will be operated by the Contractor and witnessed <br />by a South Bend Water Works representative. Any installed material that is not functioning properly <br />will result in a failed test. The accuracy of the as-built drawings will be checked at this time. <br />All visible leaks shall be repaired and retested. All pipe, fittings, and other materials found to be <br />defective under test pressure shall be removed and replaced. <br />Deviation from the above test procedure shall not be permitted. <br />4. Disinfection <br />The water main must be flushed so that the chlorine residual is representative of the South Bend Water <br />Works distribution system. No bacteria samples will be taken until the free chlorine residual in the <br />water main is at least 0.50 mg/L and no higher than one and one-half (1.50) mg/L. After the flushing <br />is complete and before a sample is taken, the newly installed water main must be isolated from existing <br />potable water mains by closing the necessary valve(s). The Contractor must open this valve(s) prior to <br />bacteriological testing. <br />The form of chlorine, concentration, and points of application and sampling shall be as directed by the <br />South Bend Water Department. The chlorination procedure shall be in accordance with AWWA <br />Standard C651 – Disinfecting Water Mains, and as outlined herein. <br />As per AWWA standard C651-99, a sample will be taken every 1,000 feet of installed water main and <br />at all dead-end water mains. The samples will be collected at the appropriate fire hydrants. Each 1,000 <br />foot section will pass its bacteria test before moving on to the next 1,000 foot section. <br />Tests shall indicate the water to be completely free from the members of the coliform group. <br />In the event of a failed bacteria test, the Contractor is responsible for flushing the system and re- <br />chlorinating.