R2019-192 Resolution Approving an Agreement with CDM Smith for Professional Engineering Services for the Water Utility Long-Term Sustainability Plan, City Project 2018-34

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Smith Task 5-4: Treatment Strategies and Alternatives CDM Smith will develop a series of potential treatment strategies and alternatives to address the water quality challenges facing the Utility. Potential areas to be evaluated: • Process optimization • Evaluate the blending of existing surface water supplies with the new ground water source (efforts related to treatment of groundwater sources is assumed to be developed by the Interra Study—this effort is limited to coordination) • Expansion of the water treatment plant versus rehabilitation of aging facilities. • Disinfection by-products As part of this task,CDM Smith will develop conceptual layouts for up to three treatment alternatives to address the above water quality challenges. Comparison level cost estimates will be developed for the three alternatives.As part of this task, CDM Smith will evaluate the need for the addition of Claricones at the WTP. Task 5-5: Workshop CDM Smith will conduct a workshop with Utility staff to review the findings and recommendations related to the treatment technologies and process changes. Minutes from the workshop will be prepared by CDM Smith and submitted to the Utility.The feedback received in the meeting will be used to finalize this Section in the draft Water Master Plan. Task 5-6: Prepare Draft Technical Memorandum CDM Smith will prepare a draft technical memorandum describing the findings from Tasks 5-1 through 5-4 above.The memorandum will be written in a format that allows the final version to be easily incorporated in to the final Water Master Plan as described below in Task 8-1. Task 6: Distribution System Evaluation and Assessment Task 6-1: Kickoff Workshop CDM Smith will conduct a kickoff workshop specific to the distribution system evaluation and assessment.The purpose of this workshop will be to review the data collected in Task 2, determine the level of service expected to be provided by the Utility, select water demand scenarios to examine, outline CDM Smith's approach for evaluating the distribution system, and finalize the workplan for this Task jointly with the Utility. Task 6-2: Limited Assessment and Analysis of Distribution System CDM Smith will provide a limited assessment of the existing distribution system using the Utility's existing, calibrated hydraulic model to identify any potential deficiencies within the system. Potential deficiencies may be related to system pressures,fire flows and water age at the different water demand scenarios and level of service expectations discussed in Task 6-1. Work to be performed under this subtask includes: 6 � Page