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Attachment SC <br /> • Assess firm capacity for future expansion of the contributory portion of the <br /> system. Identify lift stations that may be eliminated either by discrete projects or in <br /> conjunction with other capacity and condition capital projects. <br /> • Evaluate the necessity of Main Lift Station improvements (previous Master Plan projects <br /> #17 and#50)with regard to potential new WWTPs. Establish timelines for necessary Main <br /> Lift Station improvements to aid in new WWTP feasibility assessment, timing, and <br /> opportunity cost. <br /> E3. Progress Meeting#4: Attend and facilitate a meeting with City to review existing and future system <br /> analysis. <br /> Task F: River Rd Lift Station and Davis Ln Relief Lift Station Analysis <br /> F1. Data Collection and Review: Review available flow monitoring data, smart cover data, and work <br /> order history for the collection system assets discharging to the River Rd Lift Station (LS 14). <br /> Interview City staff familiar with the operation and maintenance of the areas served by the River Rd <br /> Lift Station. Review the proposed relief lift station location and contributing collection system <br /> network. <br /> F2. Perform Hydraulic Analysis of Lift Station 14 Contributing Areas: Create the new Davis Ln relief lift <br /> station, as proposed by the City, in the updated hydraulic model developed in Task C. Perform <br /> hydraulic scenarios of average and peak wet weather flow conditions to assess how flows diverted <br /> from the River Rd lift station reduce surcharging. Identify downstream impacts of flows rerouted at <br /> the Davis Ln Lift Station under existing system conditions. Review proposed developments and <br /> projected future flow increases to River Rd Lift Station and provide recommendation for ultimate <br /> replacement of the River Rd Lift Station. <br /> F3. Progress Meeting#5: Attend and facilitate a meeting with City to review the Lift Station 14 analysis. <br /> F4. Relief Lift Station Technical Memorandum: Prepare a Technical Memorandum detailing the <br /> hydraulic modeling results,downstream impacts, and recommendations from the Relief Lift Station <br /> analysis. Scope and timing of recommendations to be included as part of the overall CIP <br /> development detailed in Task H. An electronic PDF file of the Technical Memorandum will be <br /> submitted to the City. Comments or edits to the memorandum will be incorporated into a Final <br /> Technical Memorandum. <br /> Task G: Wastewater Treatment Plant Siting Evaluation <br /> G1. Conceptual WWTP Sizing:Using the buildout sizing methodology developed as part of the Riverbend <br /> Ranch and Rattler Ridge evaluation, desktop evaluation of similar capacity facilities, and feedback <br /> from City Staff on ultimate facility uses, FNI will develop a proposed buildout size(acreage) required <br /> for the South WWTP. <br /> G2. Desktop Siting Study: Using the required buildout acreage for the site and constraining based on <br /> land use, terrain information, and proximity to floodplain, FNI will identify potential land parcels <br /> suitable for further feasibility study. <br /> Page 5 of 8 <br />