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The tank mixing evaluation workflow and basic schedule is shown in the following figure.The schedule is <br /> based on an assumed NTP of 2/15/19. <br /> Task 3.4-General Distribution System Implementation Road Map <br /> Carollo will review the Sycamore Tank and provide general recommendations for the installation of a residual <br /> control system, mixing system,and other improvements.The analysis will only include the Sycamore tank and <br /> no other tanks in the system. Based on the results of the sampling evaluation, Carollo will provide a high <br /> level road map with recommendations for further pursuit at a later time. For example,the evaluation may find <br /> areas where the City should consider pursuing an O&M type approach(i.e.,auto monitoring, increased flushing, <br /> chlorine burn,etc.),or the evaluation may highlight potential upper zones that the City may prefer to continue <br /> to more closely monitor and target in future efforts.Detailed analyses of upper zones is not included in this <br /> scope of work and would be completed when the source water and lower zone mixing evaluation is complete. <br /> Task 3.5 Nitrification Evaluation Report,Workshop,and Residual Control System Specification <br /> Carollo shall prepare a draft report that documents the evaluation and findings of the nitrification evaluation <br /> for review and comment by City staff.Carollo will submit a Draft report for City review and incorporate City <br /> comments into the Final report.Carollo will facilitate a workshop to summarize findings of the Nitrification <br /> Evaluation. <br /> This task also includes the development of technical specifications to support the City's procurement of the <br /> tank mixing equipment.The information would include technical specifications,a basic plan view drawing of <br /> the pilot equipment, piping connections to the Foothill Tank,and all required utility connections.It is <br /> assumed the City will lead the procurement process by developing the front-end specifications and lead the <br /> procurement by answering questions during the bidding process. <br /> Task 3.6—Selected O&M Approach Implementation Support(Optional Task) <br /> Based on the results of Task 3.4, Carollo will provide additional evaluation of one selected O&M approach. <br /> The outcome of this evaluation will provide guidelines for City implementation of the selected approach,or <br /> provide on-going engineering support during the preparation and startup of the selected approach.Task <br /> activities may include the development of specific elements,such as:development of hydraulic mixing <br /> evaluation to be implemented by City staff,development of bench-testing protocol to support the <br /> development of estimated water age at specific distribution system locations, modified distribution system <br /> water quality monitoring plan,water quality triggers in targeted location(s)of the distribution system,set <br /> point for distributed chemical metering systems,tank operational levels,areas of flushing,etc. <br /> Task 3.0-Deliverables <br /> 1. Data request and recommended additional water quality sampling within the distribution system. <br /> 2. List of potential sites/residual control&mixing systems for the City to tour. <br /> 3. Recommended residual control and mixing system at the Foothill Tank.This recommendation will be <br /> described in the Nitrification Evaluation TM. <br /> 4. Draft and Final Nitrification Evaluation TM. <br /> 5 <br />