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<br />cross-check on the land use-based demand projections. In addition, recycled water offset projections shall <br />be taken into consideration when determining future potable water demands. <br /> <br />Additionally, WY A will define a high and low water demand projection: one assuming that all projected <br />services in the City are active based on timing provided by Planning Division staff and one assuming <br />status quo development (Le., historical trends). Both water demand projections will be developed for 2009 <br />and in five-year increments (for years ending in 0 or 5) until year 2030, based on land use data provided by <br />the City and others, and include any new service areas identified by the City that may be served in the <br />future. All demand projections will be made using the best available information on timing of future <br />development. <br /> <br />Projected demands, as reviewed and agreed by the City, will be used in the hydraulic model development <br />and creation of the Capital Improvement Plan (in five year increments, 2010 to 2030, for years ending in 0 <br />and 5). <br /> <br />TASK 5.2. DEVELOP PEAK WATER USE ESTIMATES <br /> <br />WY A will analyze historical and existing system usage to develop seasonal, maximum demand day and <br />peak hour peaking factors. Since the City does not meter SFPUC deliveries to the system, other than <br />monthly, a variety of data sources will be used. <br /> <br />Monthly peaking factors will be developed from monthly billing data. WY A will review peaking factors <br />by aggregate water use and by individual billing class to determine whether peaking factors should be <br />disaggregated by use type. The maximum day and peak hour peaking factors will be developed based on <br />review of adjacent agencies (e.g. Cal Water's Bear Gulch District system, City of Palo Alto), and results <br />from the flow monitoring program conducted in Task 6. Since the flow monitoring program will most <br />likely not be conducted during the peak water use month, the data will be used to compare monthly use to <br />daily and peak hourly water use trends. These values will be compared with minimum values specified in <br />the California Code of Regulations Title 22 Water Works Standards. <br /> <br />Task 5 Work Products: <br /> <br />. Draft chapter on existing and projected annual water demands, including a summary of the <br />estimated maximum day and peak hour peaking factors. <br /> <br />Task 5 Assumptions: <br /> <br />. City will provide information on recycled water projections and their locations for use in <br />developing potable demand offsets. <br /> <br />Task 6. Hydraulic Model Development and Calibration <br /> <br />Objective: The purpose of this task is to develop a calibrated hydraulic simulation system model of the <br />City's water distribution system that will accurately reflect the existing distribution system configuration <br />and current operating conditions, and will also be used as an operational and planning tool. The model will <br />be developed using software selected in Task 3, and will be a fully calibrated model set up for extended <br />period simulation. <br /> <br />October 22,2009 <br /> <br />6 <br />