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Description Demand Water System Purpose <br /> 20-Year Fire Flow, 20-Year Existing system+ Evaluate 20-year fire flow deficiencies after <br /> Steady State Maximum Day improvements to incorporating all 10-year CIP projects to <br /> plus fire flow solve existing and 10- identify projects for 20-year CIP <br /> year deficiencies <br /> 20-Year Peak 20-Year Peak Existing system+ Evaluate 20-year peak hour deficiencies <br /> Hour,Steady State Hour improvements to after incorporating all 10-year CIP projects <br /> solve existing and 10- to identify projects for 20-year CIP <br /> year deficiencies <br /> 2. Water age analysis of existing system. <br /> a. Using the City's existing model set up for extended period simulations (EPS) as a <br /> template, set up the model calibrated for this WSP effort to do EPS runs. <br /> b. Using the existing system with existing average day demand applied to the diurnal <br /> curve currently in the City's EPS model. Complete a water age model run. <br /> c. Prepare technical memorandum summarizing analysis and results. <br /> 3. Transmission system analysis <br /> a. Meet with City to discuss proposed north-south transmission main connecting the <br /> north and south transmission corridors and specific modeling scenarios required. <br /> b. Update model with proposed transmission main. <br /> c. Complete modeling scenarios to determine change in pressures in the transmission <br /> system given proposed transmission pipe and determine ability to operate <br /> transmission system if portions of the existing transmission system have to be taken <br /> out of service. All scenarios will be steady-state model runs. Up to four scenarios will <br /> be modeled and evaluated. <br /> d. Prepare technical memorandum summarizing analysis and results. <br /> 4. Develop Table of Capital Improvements for inclusion in final CIP listing. <br /> 5. Develop map with locations of the CIP items included in the final list. <br /> System Analysis Chapter <br /> 1. Prepare CWP chapter covering the storage capacity analyses, model update, demand <br /> allocation, calibration, and modeling runs. <br /> 2. Include a water system physical capacity table based on Worksheet 6-1 of the DOH Water <br /> System Design Manual. <br /> 3. Develop 11x17 maps showing the location of distribution system deficiencies for the current, <br /> 10-year and 20-year planning periods. <br /> 4. Develop 11x17 maps that show the locations of the CIP projects included in the final CIP list. <br /> Everett Comprehensive Water Plan June 12, 2019 <br /> Exhibit A—Scope of Services Page 21 of 30 <br />