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1i <br /> • Run separate models from Alderwood Water and Sewer District, Mukilteo, and Silver <br /> Lake individually and insert the base information into the Everett Model (no additional <br /> calibration to be done on these three models). <br /> Model Calibration <br /> Collect Data <br /> • Use SFE Global (subconsultant, see attached scope of work) to assist in field data <br /> collection <br /> o Instantaneous Fire Flows (dechlorinate prior to discharging water) <br /> o Recording pressure gauges <br /> o Temporary Flow meters <br /> • Work with City to select sites for fire flow tests and recording meters <br /> • Obtain data on pipe material and age and research published data for initial C-factor <br /> allocation <br /> • Instruct City staff on data collection procedures for C-factor analysis during flushing <br /> program <br /> • Incorporate data from City flushing program into C-factor calculation, if available. <br /> • Confirm existing demand as developed by pilot project. <br /> • Work with City staff to determine what information is available for development of a <br /> diurnal curve and if sufficient information is available, develop the diurnal curve from <br /> transmission line flow and reservoir level data as supplied by the City. Calibrate Model <br /> • Calibrate in accordance with Calibration Guidelines for Water Distribution System <br /> Modeling prepared by the Engineering Computer Applications Committee of the AWWA. <br /> • Planning level calibration is reached when simulated information is within +/- 5 psi of the <br /> field data for all readings. <br /> • Design level (fire flow analysis) calibration is reached when simulated information is <br /> within +/- 2 psi. <br /> • Perform Steady state calibration to Design Level accuracy. <br /> • Perform Extended Period Calibration to Design Level accuracy. <br /> • Develop methodology to incorporate modifications to the Alderwood Water and Sewer, <br /> Mukilteo, and Silver Lake models into the Everett model. <br /> Evaluation of Model for Initial Distribution System Evaluation (IDSE) Use <br /> • Evaluate the model to determine if the requirements listed in the IDSE Guidance Manual <br /> are met (see Task 10). <br /> iIJ7 <br /> Everett Comprehensive Water Plan April 15,2005 <br /> Exhibit A—Scope of Services Page 12 of 21 <br />