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The Consultant will prepare a TM that summarizes the discussion of the Consultant's and City's approach to developing the design flow, design storm and hydraulic criteria, including recommendations for updates, revisions and additions to the City's design standards. Deliverables: • Draft TM on design flow, design storm and hydraulic criteria and recommendations of updates, revisions and additions to City standards • Meeting agenda and minutes TASK 6 - DEVELOP HYDRAULIC MODEL Under this task, the Consultant will develop and calibrate a hydraulic model of the collection system. The Consultant will use its own software licenses for the modeling work; however, all model files developed and generated as part of the project will be provided to the City at project conclusion. Model software used for the project will be suitable for conversion to EPA SWMM5. Subtask 6.1— Review GIS and Other Data for Use in Constructing Model The Consultant will review the City's sewer GIS data and other relevant information provided by the City that may be used to construct the model network, including survey data and record drawings of sewer facilities and the City's previous InfoWorks model from the 2013 Master Plan Update and current EPA SWMM5 model. Based on this review, the Consultant will identify critical gaps in the data that may require field verification by the City. Subtask 6.2 - Construct and Validate Model Network Database Using data from the City's GIS and previous hydraulic model, Consultant will develop a new hydraulic model of the sewer system. The modeled network will include all City - owned sewer mains that are included in the City's GIS and/or in the City's previous hydraulic model, as well as all City -owned pump stations and force mains. The Silicon Valley Clean Water (SVCW) Maple Street Pump Station will be treated as an "outfall" of the main system sewer model. Operating, flow, and/or wet well level data for the pump station obtained by the City from SVCW under Task 2 will be used to develop a level hydrograph at the pump station to represent the downstream hydraulic gradeline in the system. A similar methodology will be used for the outfall(s) of the Redwood Shores system at the SVCW treatment plant. Following the construction of the model database, a QA/QC process called "model validation" will be used to verify the data before beginning model runs. The validation process includes checking network connectivity and data completeness and reasonableness for apparent discrepancies (e.g., negative pipe slopes, outlet pipe invert elevations higher than inlet invert elevations, etc.). To the extent possible, information from available record drawings or field verification requested of the City will be used to resolve critical data issues in the modeled sewer network for pipes that may significantly REV: 01-28-19 PR Page 15 of 21 ATTY/AGR.2019.012Moodard & Curran