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September 14, 2018 Mr. Rudy Rosas, P.E. Senior Civil Engineer City of Santa Ana 220 S. Daisy Ave. M-85 Santa Ana, CA 92703 Subject: Proposal to Provide Ongoing Water System Computer Model Solutions, 3-year Initial term, with optional renewal for 2 years Dear Mr. Rosas, Sedaru, Inc. (Sedaru) is pleased to submit this proposal to the City of Santa Ana (City) to provide software and services to the City's water engineering department. This proposal serves as a continuation of services provided under Sedaru's Water System Computer Model Solutions contract from 2015-2018, wherein Sedaru delivered solutions from hydraulic modeling, to engineering analysis and applications designed to maximize the input, output, and recommendations from the City's calibrated water system computer model. Background: Sedaru has provided engineering solutions for the City since 2015, incorporating: the City's institutional knowledge, while gaining a unique and valuable understanding of the City's water system hydraulic challenges, performance characteristics, infrastructure condition and opportunities for efficiency. Unique, City -specific Experience: Sedaru has delivered a comprehensive range of engineering and operations related solutions, as summarized below. • Built and calibrated the City's water system hydraulic model, • Supported hydraulic simulations for the City's 2016 Water System Master Plan, including: o System -wide fire flow analysis to understand and plan -for system redundancy and adequate minimum fire flow protection, o Criticality analysis to Identify the City's most vulnerable corridors & related system valves o Energy management analysis to assist with efficient use of existing system capacity, o Water quality analysis to identify areas of system stagnancy across the system, where high disinfectant bi-products may form. • Analyzed multiple water quality and operational related analyses to ensure acceptable minimum water age under varying demand conditions, • Delivered analysis, results, and a Technical Memorandum with recommendations for the County Administrative Block hydraulic Feasibility Study, • Completion of a water system flushing program, • Delivery of the Hydraulic Model and GIS-based solution "Sedaru" to City Engineering & Operations staff to support ongoing, in-house: o Hydraulic Simulations (Sedaru Modeling) for utility -focused analysis such as fire flows, o SCADA trending & alarms (Sedaru OMNI), integrated in the same Model interface, o Facility Inspections from an app, w/automated production reporting (Sedaru Fieldforce) o Identification of optimal pipeline replacement strategies for the City's high return on its capital investment (Sedaru CIP). Services to implement this tool included: