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• <br /> City of Everett ,F%oPlfO iii it i,1 ��II inpl iq.�r;'�;���1. a 11Mu1 �ll ��r IFL! 1h {2iOltl 511:1i11��. �_1n.� �f <br /> i. _ _ v _ r - <br /> 4. Assist ADS with access to the rain gauge and meter sites for installation of meters if <br /> needed. <br /> Assumptions <br /> 1. Up to one half-day of site visit time for two team members (Project Manager and Project <br /> Engineer) including 1 hour of travel time and 1 hour for preparation and summary report, <br /> for a total of 6 hours per team member. <br /> 2. Existing as-builts and GIS data used to determine location of flow meters accurately <br /> represent field conditions. <br /> Deliverables <br /> 1. Data collected from rain gauges and flow meters. <br /> 2. Field investigation report (maximum of 4 pages of text, PDF files via email). <br /> Task 300 — Model Calibration <br /> Objectives <br /> Review the hydraulics and assumptions made in the model regarding the hydrology. Compare <br /> the model output with collected data from Task 200 and historical flow meter data provided by <br /> the City for up to three storm events. Calibration criteria shall be +25%/-15% for peak flow rates <br /> and +20%/-10% for peak volume events if feasible. Model parameter changes will only be made <br /> to subcatchment contributing area and RTK values to match metered flows and levels. <br /> BHC Services <br /> 1. Review current subcatchments in the model and make updates or changes as needed. <br /> 2. Revise subcatchments to reflect areas within the study area where stormwater is <br /> separated from the combined sewer. <br /> 3. Review the Summit Interceptor model attributes and revise as necessary. <br /> 4. Spot check other large diameter pipes and revise as necessary. <br /> 5. Use available rainfall data to run model. <br /> 6. Use flow meter data collected as part of Task 200 to calibrate subcatchments and RTK <br /> parameters. <br /> 7. Review level data collected by the City. This data will be used to validate the model but <br /> will not be a primary calibration method. <br /> 8. Run long-term simulation in calibrated model and review results. <br /> City of Everett Responsibilities <br /> 1. Provide current model and data for defining boundary conditions. <br /> 2. Provide current GIS sewer and stormwater data. <br /> 3. Provide City-collected flow and level data. <br /> 4. Provide as-built documentation and O&M information on existing equipment, utilities and <br /> infrastructure as requested. <br /> 5. Provide record (as-built) documents and current operating control strategies. <br /> 6. Provide timely input on all deliverables and information requests from the Consultant. <br /> Client reviews shall be completed within 2-weeks. <br /> n <br /> Scope of Services 4§ <br /> CONSULTANTS <br />