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OVERVIEW © 2025 Fischer Compliance, LLC. All rights reserved. Sewer System Management Plan licensed for Redwood City use only Page 1 of 59 Introduction This Sewer System Management Plan (SSMP) or “Plan” has been prepared for the City of Redwood City (City) with technical assistance from Fischer Compliance LLC with the goal of meeting and exceeding compliance with the State Water Resources Control Board 2022 General Waste Discharge Requirements, Order WQ 2022-0103-DWQ for Sanitary Sewer Systems (referred to throughout this document as the WDR). The City provided all details, information and institutional insights for preparation of the SSMP. The document has been developed to meet the size, scale, and complexity of the City, serving as a “living document” used as a tool for managing and operating the City's sanitary sewer collection system. Additionally, the latest 2024 Sewer System Management Plan Guidance Manual published by the Bay Area Clean Water Agencies (BACWA) was utilized as a model for development of the document to harmonize formatting/content and incorporate recommended suggested guidance wherever possible. The City’s commitment to meeting or exceeding regulatory requirements, along with its proactive approach to operation and management of the collection system, has served it well, as evidenced by the system’s performance relative to other agencies in the region and the state. Figure 1 provides key spill metrics, including data comparing the City’s spill record with state and regional system data for the five-year period of April 2020 through April 2025. The City consistently performs better than both statewide and regional spill rate indices (with the minor exception of Category 3 main system spills) and net spill volumes for all categories of spills from its sanitary sewer collection system. Figure 1 - Collection System Operational Report – SWRCB CIWQS ATTY/RESO.0077/CC RESO SEWER SYSTEM MANAGEMENT PLAN - EXHIBIT A REV: 07-14-25 LF Page 8 of 317