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   <br />Note: Click on hyperlinks to get comparison charts for CS, Region, and State grouped by 'Miles Of Pipe'. <br />   <br />(1) The number of Category 1, 2 and 3 SSOs resulting from a failure in the Enrollee sewer system per 100 miles <br />sewer system owned by the Enrollee per year. <br />(2) Net Volume (volume spilled minus volume recovered) of SSOs, for which the reporting Enrollee is responsible, <br />per capita (i.e. the population served by your agency's sanitary sewer system), per year. <br />(3) Value calculated using miles of force mains and other pressure systems and miles of gravity sewers the agency <br />is responsible for. <br />(4) Value calculated using miles of laterals the agency is responsible for (Lower Only, UpperLower). For collection <br />systems with no lateral responsibility a N/A is shown. <br />(5) Value Calculated using total miles of collection system pipe the agency is responsible for. <br />(6) Comparison made between similar collection systems type (e.g. municipal) and lateral responsibility for the <br />entire state over the selected time period. Comparison indices are calculated for all similar collection systems and <br />averaged for comparison. <br />(7) Comparison made between similar collection systems type (e.g. Municipal) and lateral responsibility for <br />collection systems in same region (e.g. Region 5S). Collection system indices are calculated for all similar <br />collection systems and averaged for comparison. For airport, hospital, marinas, military, park, port, prison, school, <br />and other collection systems facilities, only state comparison is shown. <br />(8) For Criteria used and term definitions refer to the SSO Glossary of Terms. <br />(9) Other: Includes spills caused by vandalism, surcharged pipe, operator error, and unknown causes. <br />       <br />     <br />  Percentage of total Number and Volume of SSOs by Spill Cause <br />     <br />Collection System: Redwood City CS <br />   <br />1/5/25, 6:28 AM California Integrated Water Quality System (CIWQS 100.0) - Build Number: mainTrunk.mm.dd.yyyy.1 <br />https://ciwqs.waterboards.ca.gov/ciwqs/readOnly/publicReportSSOPerformance.jsp?wdid=2SSO10168&fromPerformance=true&category=&startDate=&endDate=2/9 <br />ATTY/RESO.0077/CC RESO SEWER SYSTEM MANAGEMENT PLAN - EXHIBIT A <br />REV: 07-14-25 LF <br /> <br />Page 259 of 317