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1 <br /> CITY OF EVERETT SPECIAL PROVISIONS <br /> 4 100 1 1 <br /> 6 200 1 1 <br /> 8 400 2 1 1 <br /> 10 600 3 2 1 <br /> 12 900 2 2 <br /> 16 1,600 4 2 <br /> Guidelines for Water Main Volume <br /> Inside Dia. Volume per 100 LF , <br /> (in) (gal) <br /> 4 65 <br /> 6 147 <br /> 8 261 <br /> 10 408 <br /> 12 587 <br /> 20 1,632 <br /> Provide taps and other appurtenances required for temporary release of air, <br /> chlorination, or flushing purposes as a part of the Work. <br /> To protect aquatic life in receiving waters, neutralize the chlorine contained in the <br /> discharge water before disposing into a natural drainage channel or feature 111draining to a natural channel. Dispose of disinfecting solutions to the satisfaction <br /> of the City of Everett and the Washington Department of Ecology. Discharge water <br /> disposal may be directed to an available sanitary sewer, if approved by the <br /> Engineer and provided the rate of disposal will not overload the sewer. <br /> 7-09.3(24)B Disinfectant Concentration and Retention Period (Contact <br /> Interval) <br /> Provide disinfection concentration necessary to obtain a free chlorine residual of <br /> not less than 10 mg/1 remaining in the disinfectant solution after a 24 hour contact <br /> time. Provide the initial free chlorine residual concentration of disinfectant solution <br /> not less than 25 mg/I. Contractor may reduce disinfectant chlorine solution contact <br /> time from 24 to 12 hours by using an initial disinfectant concentration of 50 mg/I. <br /> Maximum allowable disinfectant concentration shall be 50 mg/I. The ending <br /> concentration of an initial 50 mg/I solution following a 12 hour contact time shall be <br /> not less than 10 mg/I. <br /> 7-09.3(24)C Form of Applied Chlorine <br /> Perform disinfection of water mains using the continuous feed method employing <br /> either liquid calcium hypochlorite or liquid sodium hypochlorite solutions. Dry <br /> calcium hypochlorite and gaseous or liquid chlorine is not allowed. <br /> Follow the continuous feed methods specified in the most recent version of AWWA <br /> Standard C-651 and Section 5-15 of the latest edition of the City of Everett <br /> "Design and Construction Standards and Specifications for Development", except <br /> for the City's prohibition on the use of dry calcium hypochlorite or gaseous <br /> chlorine. ' <br /> 7-09.3(24)D Point of Application <br /> Whenever possible, use the beginning of the pipeline extension, or a valved <br /> section of it, as the point of application for the disinfectant solution. Provide a tap <br /> 1 <br /> to supply water for delivering the disinfectant solution on the pressure, or <br /> upstream, side of the valve controlling the flow into the pipeline extension, but <br /> downstream of the backflow preventer used to isolate the new main from the <br /> Water Main Replacement S Division 7—STORM,SEWER,WATER January 29, 2018 <br /> WO No.—UP3664 SP—150 <br />