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OPERATION AND MAINTENANCE PROGRAM © 2025 Fischer Compliance, LLC. All rights reserved. Sewer System Management Plan licensed for Redwood City use only Page 25 of 59 4. Operation and Maintenance Program WDR REQUIREMENTS Att. D-4 (pg. D-4) “The Plan must include the items listed below that are appropriate and applicable to the Enrollee’s system.” 4.1. Updated Map of Sewer System WDR REQUIREMENTS Att. D-4.1 (pg. D-4) “An up-to-date map(s) of the sanitary sewer system, and procedures for maintaining and providing State and Regional Water Board staff access to the map(s). The map(s) must show gravity line segments and manholes, pumping facilities, pressure pipes and valves, and applicable stormwater conveyance facilities within the sewer system service area boundaries.” COMPLIANCE The City maintains comprehensive maps of its collection system, which are made available to the public upon request. To keep the maps current, the Engineering and Transportation Department provides as-built information from City projects and private developments within 90 days of receipt of a Completion of Project Development document to the Geographic Information System (GIS) Division of the City’s Information Technology Department. In addition, if Wastewater Division staff discover inaccuracies, the findings are logged and forwarded to the GIS Division. Staff are able to use a red line feature in Hiperweb to mark the inaccuracy, which is then provided to the Utilities Field Supervisor for submittal to the GIS Division for map updates. Information updates are entered into both the City’s computer-aided design (CAD) and geographic information systems (GIS). Maintenance workers carry block books (printed from the City’s GIS records) and mobile maps by utilizing ESRI enabled GIS software to identify sewer and storm drain lines for maintenance purposes. The City utilizes HiperWeb software for utility infrastructure mapping and asset management. HiperWeb provides City staff with the ability to access attribute data for sewer and stormwater pipelines using a mobile device. Stormwater facilities are included in these block books and HiperWeb software with different symbology. Sanitary sewers are shown as solid, brown color-coded lines with arrows indicating flow direction. Sewer lines are also labeled with their material type. Force mains can be differentiated from gravity sewers by map symbology and the type of material. The block books also show streets and parcels, manhole locations and elevations, pipe locations and sizes, lift station locations, and locations of air relief valves. The system maps include gravity mains, force mains, manholes, pump stations, property boundaries and addresses, creek locations, storm drains, and pipe asset information (ID number, diameter, flow direction, segment length, material type, and age). The City will provide the system maps to State Water Board staff upon request. EFFECTIVENESS The City utilizes the following Key Performance Indicators for measuring effectiveness of this Element: • Were all map updates completed in a timely manner? • Are all staff trained in the procedure for providing map update information? ATTY/RESO.0077/CC RESO SEWER SYSTEM MANAGEMENT PLAN - EXHIBIT A REV: 07-14-25 LF Page 32 of 317