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b. A solution of water containing high test hypochlorite (70% available <br /> chlorine)shall be introduced into the line by regulated pumping at the control ' <br /> valve tap. The solution shall be of such concentration that the water in the line <br /> will have at least 50 ppm total chlorine residual immediately after chlorination. <br /> The following chart shows the required quantity of 70% HTH compound to be <br /> contained in solution in each 1,000 foot section of pipe to produce the desired , <br /> concentration of 50 ppm: <br /> Pipe Size Pounds 70% HTH Per 1,000 Ft. of Pipe , <br /> 6" 0.88 <br /> 8" 1.56 ' <br /> 10" 2.42 <br /> 12" 3.50 <br /> c. The HTH solution shall be circulated in the pipelines by opening the ' <br /> control valve and systematically manipulating hydrants and taps at the line <br /> extremities until a uniform concentration has been produced throughout the ' <br /> Pipe. <br /> d. The HTH solution shall remain in the line for not less than 24 hours. At ' <br /> the end of this time, the residual chlorine shall be at least 10 ppm. Should the <br /> chlorine residual be found to be less than 10 ppm, then the pipelines shall be <br /> rechlorinated. <br /> g Following satisfactory chlorination, the pipelines shall be flushed. <br /> Flushing shall continue until only a normal chlorine residual, as determined by <br /> the ortho tolidine test, is present in the water. ' <br /> f. Fallowing the flushing of the pipelines, samples shall be taken at various ' <br /> points along the line designated by City for bacteriological analyses. If test <br /> results are satisfactory, the pipelines may be placed in service. If test results <br /> are not satisfactory, rechlorination shall be undertaken at once. , <br /> All chlorination of the water system shall be performed by the Contractor at no <br /> cost to the Owner. ' <br /> Provide a copy of acceptable test results to the City. <br /> 19. Connections to Existing Water Mains. Connections to existing water ' <br /> mains shall be made as detailed on the plans, using material hereinbefore <br /> specified or as shown on the Drawings. No connection to existing water main ' <br /> without approval of the City. <br /> 29. Pipelines Under State Highway Pavement. Where shown on the Plans, <br /> or as directed by the Engineer, ductile iron water mains shall be installed under ' <br /> WATER LINES: DETAILED SPECIFICATIONS FOR INSTALLATION W-8 ' <br /> 10/15/09 <br />