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<br />The pond will accumulate sediment in especially heavy rWloff periods. <br />This sediment must be removed periodically with heavy equip.nent. The <br />sedimentation pond is designed so that each compartment can be cleaned <br />separately while the other compartment functions as a standby pond for <br />continuous l'later supply to the town's syste.ll. Cleaning should only <br />take a few hours lnth 11. bulldozer. The system is designed to handle a <br />foot of sediment on the bottom before cleaning is necessary. This <br />height can easily be adjusted by stop logs, if necessary. <br />The twelve inch overflow is fitted with a trash rack. The capacity <br />of this overflow is designed to take all the ditch flow at a 0.63 foot <br />of head over the top of the pipe. See Map E which is attached to this <br />report. <br />The proposed treatment plant involves a pressure filter which can <br />handle 300 gallons per minute. The raw water is chlorinated before <br />entering the filter to cut down on algae buildup and chlorinated again <br />after filtration to provide a residual chlorine in the distribution <br />lines. The storage tank acts as a chlorine contact tank to allow time <br />for the chlorine to act effectively. The backwash system can be operated <br />automatically or manually. A clear tube is shown installed on a vertical <br />backwash line with a fluorescent light behind it 50 the operator may <br />determine the clarity of the backwash effluent. This pt'oject Should <br />include a complete water test kit so the town's operator may mom tor <br />water quality. The test kit should include pH, turbidity and chlorine <br />residual tests. <br />See E:x:hibits F and G of this report for diagrams of the proposed <br />treatment faCility. <br /> <br />- ?,.~ - <br />