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City of Redwood City - Sewer System Modeling, Capacity Assessment, and Master Planning Draft Scope of Work City's sewer service area. It is assumed that this information will be available from previous Master Plans for the SSMDs prepared by San Mateo County. Subtask 3.5 - Prepare Technical Memorandum RMC will prepare a TM on the land use planning criteria. The TM shall include a digital land use map showing areas of potential new development, infill, and redevelopment that can be used to assign future land uses to specific parcels to develop wastewater flow projections for future scenarios. Deliverables: . TM on land use planning criteria . GIS files of parcels and associated land uses Task 4 - Develop Desian Flow and Hydraulic Criteria Subtask 4. 1 - Develop Design Flow Criteria The purpose of this task is to develop the design criteria to be used to compute wastewater flows and analyze system capacity. Design flow criteria include unit base wastewater flow factors applied to residential, commercial, industrial, and institutional land uses; diurnal based wastewater flow patterns; infiltration/inflow parameters; and design rainfall. These criteria will be developed based on the flow monitoring data from the City's sewer system, as well as from RMC's master planning experience in other Bay Area systems. The design flow criteria developed in this task will be verified and refined during the model calibration process, as described in Task 5 below. RMC will also propose criteria for the design storm to be used for analyzing and determining the required capacity of sewer system facilities. The selection of design storm will take into consideration existing or potential future regulations or regulatory policy on sanitary sewer overflows (SSOs), precedent set by other Bay Area agencies, and published historical rainfall intensity-duration-frequency statistics. Subtask 4.2 - Develop Hydraulic Criteria RMC will identify appropriate hydraulic criteria to be used for assessing the capacity of the system. These criteria include Manning's In' factor, maximum diD values and/or allowable surcharge, and minimum and maximum velocities. The criteria will be reviewed and discussed with City staff. Task 5 - Develop Hvdraulic Model Subtask 5. 1 - Construct and Validate Model Network Database RMC will develop a hydraulic model of the major sewer system components that will be used to assess the flows versus the capacity of the facilities to identify potential capacity deficiencies. The model software will be purchased by the City after the model evaluation in Task 2, and provided to RMC for use in this study. Initially, it is assumed that the extent of the modeled network for the main portion of the sewer system would be all sewers 10 inches and larger, called the "trunk network," plus critical 8-inch pipes, i.e., those that effectively serve as trunk sewers or are known or suspected by City staff to have capacity problems. A comparable level of detail would be used for the Redwood Shores and Seaport Centre/Pacific Shores systems. In those systems, which consist of a series of short gravity segments, pump stations, and force mains, the largest pump stations (eight in the 3