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City of San Leandro Sewer System Management Plan Volume I Section 8 - System Evaluation and Capacity Assurance Plan D.13.(viii) System Evaluation and Capacity Assurance Pian: -The Enrollee shall prepare and implement a capital improvement plan (CIP) that will provide hydraulic capacity of `key sanitary sewer system elements for dry weather peak flow conditions, as well as the appropriate design storm or wet weather event at a minimum, the plan must'include: (a) ` Evaluation: Actions needed to evaluate those portions of the sanitary sewer system that are experiencing or contributing to an SSO discharge caused by hydraulic deficiency. The evaluation must provide estimates of peak flows (including flows from SSOs that escape from" the system) associated with conditions similar to those causing overflow events, estimates of the capacity of key system components, hydraulicdeficiencies (including components of the system with limiting capacity), and the major sources that contribute to the peak flows associated with overflow events; (b) Design Criteria: -Where design criteria do not exist or are deficient, undertake the evaluation identified in "a" above to establish appropriate design criteria; and (c) Capacity Enhancement Measures: The steps needed to establish a short- and long-term capital improvement plan (CIP) to address identified hydraulic deficiencies , including 'prioritization, alternatives analysis, and schedules. The CIP may include increases in pipe size, 1/1 reduction programs, increases and redundancy in pumping capacity, and storage facilities. The CIP shall include an implementation schedule and shall identify sources of funding. (d) Schedule: The Enrollee shall develop schedule of completion dates for all portions of the capital improvement program developed in (a -c) above. This 'schedule shall be reviewed and updated consistent with the SSMP review and update requirements as described in Section D. 14. The City periodically conducts flow monitoring and hydraulic modeling analysis to anticipate future growth or increased demand on the system as well as the City's internal inspection, rehabilitation and repair program to assure that excessive UI is not impacting the capacity of the system. The City's previous sanitary sewer master plan was completed in 1995. Since that time, the City has completed a number of sewer improvement projects and is experiencing development in a number of areas necessitating an evaluation of the capacity of the sanitary sewer system to handle future flows. A new Sanitary Sewer Capacity Study and master Plan was completed in 2015 to confirm existing flows in the collection system and anticipate capital needs for capacity improvement. In addition, it satisfies the requirement for the Sewer System Master Plan to include a System Evaluation and Capacity Assurance Plan. Capacity Assurance Program The capacity assurance process is used to determine estimated peak flows associated with wet weather conditions causing overflow events, estimates of the capacity of key system Page 129