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<br />/2sU <br /> <br />I. Marginal Cost Analysis <br /> <br />1. Perform Marginal Cost Analysis. A marginal cost analysis will be <br />performed to evaluate incremental plan cost increases with increased <br />levels of protection. <br /> <br />2. Determine Level of Protection. The incremental cost differences <br />determined in Subtask 1 will provide information for the OWNER to select <br />a desired design level of protection. <br /> <br />3. Meeting with TWC. A meeting with TWC to present and obtain <br />approval of OWNER selected level of protection will be performed. The <br />approved design level will be used in subsequent system analyses. <br /> <br />J. Develop Plan <br /> <br />1. 1/1 Reduction Plan. Based on the results of the cost-effectiveness <br />analyses, an implementation plan for I/I reduction will be developed. <br />The plan will identify the tasks necessary to address system 1/1 sources <br />within the OWNER'S system and a priority of customer areas which are <br />likely to benefit from developing and implementing an 1/1 removal plan. <br />Additional survey work may be required to locate system defects based on <br />results of this study. <br /> <br />2. System Relief/Replacement Pl~n. Based on the results of the <br />preceding tasks, for existing, year 2000, year 2010, and ultimate <br />growth, a plan for system relief/replacement relief sewers will be <br />developed. The plan will consider possible equalization facilities in <br />the system, flow diversion, and parallel and replacement relief options. <br />Sewer sizes for design purposes will be approximated to reflect, to a <br />planning level accuracy, relief sewer sizes to be constructed. <br />Necessary maintenance items will also be addressed. These maintenance <br />items will address corrosion and cleaning considerations based on field <br />observations made during this study. Planning level cost estimates of <br />each plan component will be made. It should be noted that the plan is <br />not intended to be preliminary design. Since no subsurface information <br />is being collected the impact of rock and utilities is not considered in <br />sufficient detail for final alignment and location of improvements. In <br />addition, sizing of facilities may change depending on actual slope <br />available and new information which may be collected subsequent to this <br />study. <br /> <br />K. Prepare 1/1 Report. <br /> <br />1. Draft Report. Prepare draft report summarlzlng the basis of the <br />study and recommendations. Submit 10 copies to the City for review and <br />comment. <br /> <br />2. Final Report. Review and respond to comments. Submit 10 copies of <br />final report to City. <br /> <br />L. Training. <br /> <br />1. Training. A total of three days training, including telephone <br />support will be provided for use of the hydraulic computer model and <br /> <br />06/02/93 <br /> <br />A-14 <br />