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BACKGROUND The City owns and operates a sewer collection system consisting of more than 250 miles of 4-inch through 42-inch sewer piping, eight (8) siphon locations, and 11 pump stations. The average daily wastewater flow is 6.5 million gallons per day. Collected wastewater is treated by the Dublin San Ramon Services District's (DSRSD) wastewater treatment plant, except for the Ruby Hill neighborhood, which is treated by the City of Livermore's wastewater treatment plant. Both treatment plants dispose of the treated wastewater not used for recycled water via the Livermore-Amador Valley Water Management Agency (LAVWMA). The City's annual operating budget for the sewer system is $16 million (capital improvement expenditures not included). The City's ownership and operation of its sanitary sewer system requires the City to comply with the State Water Resources Control Board (SWRCB) Order No. 2006- 00003-DWG (Statewide General Waste Discharge Requirements for Sanitary Sewer Systems) and Order No. WQ 2013-0058-EXEC (Monitoring and Reporting Program), herein referred to as WDR. The WDR sets requirements for the City to monitor, report, and notify of sanitary sewer overflows. The WDR also requires that the City maintain a Sanitary Sewer Management Plan (SSMP) for efficient management of its sanitary sewer system including the elements of administration, planning, capital improvements, resources, financing, and operations and maintenance. To assess the current state of the sewer program and compliance with WDR provisions, the City is required to perform internal audits of the SSMP every two years. The City's last audit covered the period of FY 2018/19 and 2019/20 and made recommendations for each program element to improve compliance with the WDR. The SWRCB is currently in the process of issuing a revised WDR with an estimated effective date of late 2022/early 2023. The revised WDR is anticipated to modify monitoring, reporting, and notification requirements for sanitary sewer overflows, and is anticipated to require new program management requirements that will require an update of the City's SSMP by 2024. DISCUSSION Based on the recommendations of the last SSMP audit, the City is pursuing enhancement of its O&M program for the sanitary sewer system. It is the City's goal that the O&M program enhancements are not only implemented to comply with the current WDR more fully, but also better position the City to address future WDR requirements when they become effective. The enhanced O&M program will be documented so that it can be incorporated into the future SSMP update that the City will be required to perform after issuance of the revised WDR by SWRCB. Elements of the O&M program will include, but are not limited to: • Goals / Performance Indicators: Develop goals and key performance indicators that guide and continuously evaluate the O&M program. • Pipe Cleaning and Condition Assessment: Develop the framework and workflow for a preventive maintenance cleaning program and condition assessment program for gravity piping, manholes, and siphons. The program will establish the procedures for performing cleanings and condition assessments including scheduling frequencies, Page 2 of 3