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3. Identify possible causes for the cavitation that is reportedly occurring with the <br /> existing pumps, and recommend possible methods to mitigate or eliminate <br /> cavitation. <br /> 4. Recommend suitable alternative types of pumping equipment for possible <br /> replacement of the existing pumps. <br /> 5. Provide conceptual level cost estimates for the initial capital and life cycle <br /> costs for replacement pumping equipment. <br /> 6. Estimate the hydraulic capacity of the existing piping, aeration basin, and open <br /> channel network. Identify potential "bottlenecks"in the existing water <br /> transmission system that are reportedly causing backups and overflows to <br /> occur. <br /> 7. Develop alternative methods for improving the existing water transmission <br /> system and provide a conceptual level cost estimate for implementation. <br /> 8. Investigate whether or not Friends Creek has the hydraulic capacity to convey <br /> the rated ground water production capacity(24 mgd) of the DeWitt well field. <br /> Investigate whether or not there are any regulatory or environmental concerns <br /> about the volume of water that can be discharged to Friends Creek from the <br /> DeWitt well field. <br /> B. Instrumentation and Controls <br /> 1. Develop a list of operating parameters that are recommended for remote <br /> monitoring of the existing facilities at the DeWitt well field from the South <br /> Water Treatment Plant. <br /> 2. Determine instrumentation necessary to monitor the recommended <br /> parameters. Assume that 120 volt ac service is available at each pump house. <br /> 3. Consult with Owner's independent SCADA system consultant to determine <br /> their recommended telemetry methods for providing remote monitoring. <br /> Assume that latitude and longitude coordinates for each pump house are <br /> available from Owner. <br /> 4. Provide conceptual level cost estimates for the initial capital costs for <br /> installation of new remote monitoring equipment. <br /> A-2 <br /> City of Decatur Task Order No.10 <br /> DeWitt Well Field Study Rev.08-17-06 <br />