Item 07 - Sewer System Management Plan 2025 Update

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y of Santa Ana Section 9: Monitoring, Measurement and Program Mo Section 9: Monitoring, Measurement and Program Modifications Section 9 of this SSMP addresses the requirements included in Attachment D-9 of the Order. The requirements state: Monitoring, Measurement, and Program Modifications: The Enrollee shall include an adaptive management section that addresses Plan -implementation effectiveness and the steps for necessary Plan improvement, including: (a) Maintaining relevant information, including audit findings, to establish and prioritize appropriate Plan activities; (b) Monitoring the implementation and measuring the effectiveness of each Plan element; (c) Assessing the success of the preventive operation and maintenance activities; (d) Updating Plan procedures and activities, as appropriate, based on the results of monitoring and performance evaluations; and (e) Identifying and illustrating spill trends, including spill frequency, locations and estimated volumes. The City evaluates the following Monitoring, Measurement, and Program Modifications Metrics for the sanitary sewer system and all elements of the SSMP: The SSMP elements are discussed periodically throughout the year during regular staff meetings with the Water Resources Manager and the division supervisors. Additional meetings to assess the effectiveness of individual elements are held as needed. Major studies, such as Sewer Master Plan audits and updates, and Infiltration and Inflow Studies are also used to measure the effectiveness of the SSMP and make revisions as appropriate. The City tracks the location and cause of all spills, blockages, and gravity main EMLs. The City maintains a cleaning activity log, which details the size, material and location of each pipe cleaned, as well as the equipment utilized, and any relevant remarks observed during the cleaning. The City utilizes field data acquisition software (infraMap), which utilizes ESRI software for preventative maintenance tracking and work orders. City Field Staff observe all gravity mains and manholes during routine cleaning and conduct localized video inspections when their observations warrant further investigation. Additionally, the City conducts system -wide video inspections, and each pipe is given a score based on the National Association of Sewer Service Companies' (NASSCO) pipeline rating system. All ratings are incorporated into the GIS so that all scoring is associated with a corresponding pipe that has been inspected. These ratings, as well as the observed condition of each pipeline, allow the City to identify gravity mains that are at risk of collapse or prone to more frequent blockages due to pipe defects. 2025 9-2