Agmt19 Aecom Technical Services, Inc.

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Appendix 5: Utilities Evaluation Page 16 Appendix 5: Utilities Evaluation of the South Main Mixed Use Project Consultant will complete the following tasks as part of this scope of work. Consultant will use West Yost Associates and Wood Rogers, Inc. for this evaluation, although Consultant shall be ultimately responsible for this work. The Scope of Work for engineering services will provide an evaluation of Greystar's proposed project at 1601 El Camino Real. The purpose of the facilities analysis is to review locations and sizing of potable and recycled water, sewer, and storm utilities, in accordance with the City Engineering Standards to identify impacts of the proposed development on each of the utility systems, and to identify improvements required to mitigate those impacts. SCOPE OF WORK Consultant's Scope of Work is divided into seven -key tasks, described in more detail below. • Task 1. Perform Water System Analysis • Task 2. Evaluate Recycled Water Systems • Task 3. Evaluate Sewer Collection System • Task 4. Evaluate Stormwater System • Task 5. Prepare Engineering Report • Task 6. Meeting and Project Management • Task 7. Optional Service Task for Additional Analysis Task 1. Perform Water System Analysis In this task, Consultant will perform a potable water system analysis to determine infrastructure requirements to serve the Project. The following work will be performed: • Update the Hydraulic Model: Update the City's existing water system hydraulic model to include conceptual pipelines identified in the Preliminary Utility Study and allocate demands provided by the developer's civil engineer. • Calibrate the Model: Calibrate the model using the field hydrant flow test data provided by the City to verify that the hydraulic model simulates the field test conditions. Consultant will provide a map of all existing fire flow data at existing fire hydrants in the study area. City will provide existing fire hydrant flow test reports. Locations for the flowing and residual pressure hydrants for each test will be selected by Consultant and reviewed by the City. City will perform fieldwork for the hydrant tests. Consultant will perform aminimumofthree fire flow test calibrations of the hydraulic model, or up to four hours of model calibration, and will adjust roughness coefficients as needed. To ensure the hydrant flow test field conditions are accurately captured in the hydraulic model for calibration, the City will provide current flow rates and pressure information at the SFPUC turnouts that supply the City's Main Pressure Zone and the time of day that the tests were performed. Consultant will work with the City to estimate water demand in the Main City area and based on seasonal and diumal information developed for the Water Master Plan if Consultant cannot determine the Main City Zone demand from the turnout flow rates information to the City's satisfaction. Consultant will review the calibration results to determine if pipeline roughness coefficients ATTY/AGR/2019/AMENDMENTS/AMEND NO.1-AECOM REV: 06-17-19 PR Page 16 of 22