Item 07 - Sewer System Management Plan 2025 Update

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Section 8: System Evaluation, Capacity Assurance of Santa Ana and Capital Improvements (c) Joint coordination between 0&M staff, and engineering staff/consultants during planning, design, and construction of CIP projects, and interagency coordination with other impacted utility agencies. The City's Sewer Master Plan encompasses the following components detailed in the following subsections to meet the requirements outlined above and in the Order. 8.1 Capacity Assessment and Design Criteria 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. The City's Sanitary Sewer Standard Specifications and the Standard Plans for Sanitary Sewers and Design Guidelines for Water and Sewer Facilities outline the appropriate design criteria necessary to ensure sufficient capacity, as well as preserve the estimated life -cycle of wastewater infrastructure. Any design that is not encompassed by the City Standards shall be sufficiently reviewed to ensure proper design and construction of the facility. 8.2 Priority of Corrective Actions There are several steps needed to establish a short- and long-term CIP to address identified hydraulic deficiencies, including prioritization, alternatives analysis, and schedules. The findings of condition assessments and capacity assessments are used to prioritize corrective actions. The CIP also considers the severity of the consequences of potential spills when prioritizing projects. Examples of CIP enhancements may include increases in pipe size, 1/1 reduction programs, increases and redundancy in pumping capacity, and storage facilities. The CIP includes an implementation schedule and identifies sources of funding. 8.3 Capital Improvement Plan (CIP) The City has established a Capital Improvement Program (CIP) to address projected hydraulic deficiencies. The CIP is included in the City of Santa Ana Sewer Master Plan, and includes projected cost estimates, alternatives analyses and project prioritization. The City's Sewer Enterprise Funds describe how the City proposes to continue to pay for the CIP, by noting fund balances, funding sources and fund uses. The Sewer Master Plan Update contains a list of each projects identified as necessary to increase the capacity of portions of the system. The projects are grouped by priority into four categories, with priority category one being the highest. The projects are being addressed based upon priorities. 2025 8-2