19F - RECEIVE AND FILE SEWER SYSTEM

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of Santa Ana Section 8: System Evaluation and V Assurance Plan Section 8: System Evaluation and Capacity Assurance Plan This section of the SSMP presents the City's sanitary sewer system evaluation and capacity assurance plan. 8.1 Requirements for System Evaluation and Capacity Assurance Plan Element The City has prepared and implemented a Capital Improvement Program (CIP) that will provide adequate hydraulic capacity of key sanitary sewer system elements for dry weather peak flow conditions, as well as the appropriate design for storm or wet weather event. The City's Sewer Master Plan encompasses the following components: 1) Evaluation - Actions needed to evaluate those portions of the sanitary sewer system that are experiencing or contributing to an SSO discharge. The evaluation provides 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, hydraulic deficiencies (including components of the system with limiting capacity) and the major sources that contribute to the peak flows associated with overflow events. 2) Design Criteria -Where design criteria do not exist or are deficient, undertake the evaluation identified in (1) above to establish appropriate design criteria. 3) Capacity Enhancement Measures -The steps needed to establish a short- and long-term 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. 4) Schedule —The City has developed a schedule for all portions of the CIP developed in (1)-(3) above. This schedule shall be reviewed and updated consistent with the SSMP review and update requirements. 8.2 Summary The City maintains a Sewer Master Plan which addresses the requirements outlined above. The elements of the Sewer Master Plan includes: 1) The 2016 Sewer Master Plan Update and Infiltration and Inflow Study analyzed the capacity of larger city sewers (generally 10 inch diameter and larger) for peak flow conditions under both dry and wet weather conditions. Deficient sewer line segments are identified for prioritization in the capital replacement program. The 2016 Sewer System Master Plan includes a list of recommended projects to address existing and future capacity deficiencies. The projects are grouped in four different priority categories, with priority 1 being the highest priority category and 4 being the lowest priority category. A copy of this Master Plan document has been provided to the Regional Board in digital format. April 2020 8-1 19F-31