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• SCOPE OF WORK The scope of work for the hydraulic analysis consists of three tasks as described below. Task 1- Establish Hydraulic Design Criteria for California Tank and Pump 3tation Using the existing City distribution system hydraulic model, Consultant shall develop hydraulic design parameters for the tank and pump station for the two possible tank configurations. Hydraulic modeling scenarios will be derived from the existing system scenarios that have been established for the hydraulic. Consultant shall pertorm the following work: • Meet with City to review project objectives, current operations of the Glenwood and Edgewood PS service area, and confirm study criteria for tank and pump station sizing. • Perform static hydraulic analyses to determine recommended overflow and minimum tank operating levels for normal operations and fire flows, and sizing of pipeline to connect the tank to Lakeview Pressure Zone. Consultant shall evaluate two alternate configurations using the static maximum demand day scenario: tank supplied from the Lakeview PS, with tank operating at design flow rate and tank supplied via altitude valve from the High Line. Consultant shall report operating pressures in the Califomia Pressure Zone for both scenarios. Budgeting assumes eight analysis runs. Using information from the hydraulic analysis, Consultant shall confirm tank sizing. • Review California Pressure Zone pressure results and distribution system maps to determine if there are any areas that should be considered for re- zoning, based on zone pressures. . Develop a system curve for operation of the Califomia Pump Station using the following hydraulic modeling conditions: — Normal operations to Easter Cross Pressure Zone — Maximum day plus fire flow to Easter Cross Pressure Zone — Emergency Service to the High Line and Easter Bowl Pressure Zone — Modeling scenario assumptions (e.g. tank levels, number of pumps operating) will be reviewed with the City prior to the analysis. Task 2- Perform Operational Modeling to Verify California Tank and Pump Station Operation The distribution system hydraulic model is currently set up for static simulation of the system, but also includes a diurnal curve for the Hillside Area developed from a special monitoring program conducted as part of the Water Distribution System Master Plan. In ATTY/AG W2012.024IDESIGN PROFESSIONAL AGREEMENT WEST YOST ASSOCIATES REV:03-07-12 VR Page 11 of 16