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Audit Report Due Dates (**) Audit Period Audit Report Due Certification Date 08/02/2021 to 08/02/2024 02/02/2025 08/03/2024 to 08/02/2027 02/02/2028 * A Sewer System Management Plan (SSMP) is a living document an Enrollee develops and implements to effectively manage its sanitary sewer system(s). Section 5.2 and Attachment E1 section 3.11 of the General Order requires an Enrollee to provide and certify the SSMP in CIWQS Sanitary Sewer Systems data base every six years. ** The Legally Responsible Official shall upload and certify an audit report into the online CIWQS Sanitary Sewer System Database per the requirements in section 3.10 of Attachment E1 of the General Order. Additional Information: Data used for the Operational report is reported by the enrollees through the CIWQS (California Integrated Water Quality System) SSO module. Indices are calculated for the date range specified ( default is past 4 months ) and using data available since reporting was required for all enrollees as specified in the Sanitary Sewer Systems WDR. Reporting was required to begin for Regions 4,8,9 on 1/2/2007, Regions 1,2,3 on 5/2/2007, and, Regions 5,6,7 on 9/2/2007. Comparisons are made between similar collection systems type (e.g. Municipal), and lateral responsibility for the entire state and region. Indices are calculated for all similar collection systems and averaged for comparison. Category 1 and 2 spills are required to be fully certified 15 calendar days after SSO response conclusion and Category 3 spills are required to be fully certified 30 Calendar days after end of calendar month which SSO occurred. Therefore, spill records for the past approximately 60 days may be incomplete. Average Number of Spills per 100 miles: Measures the number of sewer overflows per 100 miles of sewer lines. Notice that these indices are strongly influenced by the length of collection system owned by the enrollee. For instance, an enrollee that owns and operates a collection system of one (1) mile in length having only one (1) spill (analyzing data for ONE year) will have a Operational indice of 100.0 spills/100mi/yr. On the other hand, an enrollee that owns and operates a collection system of one hundred (100) miles in length having only one (1) spill (analyzing data for ONE year) will have a Operational indice of 1.0 spills/100mi/yr. Average Net Volume (volume spilled minus volume recovered) of Spills per Capita: Measures the volume in gallons of SSOs, for which the reporting Enrollee is responsible, per capita ( the population served by your agency's sanitary sewer system). Where the volume recovered is greater than the volume spilled, the net volume will be considered to be zero. The “agency” or Enrollee listed on a SSO report is responsible for the data presented in this report and should be contacted directly for questions related to their Data. More information on the Sanitary Sewer Overflow Reduction program is available at: http://www.waterboards.ca.gov/water_issues/programs/sso/index.shtml The Sanitary Sewer Overflows Incident Map is available at: http://www.waterboards.ca.gov/water_issues/programs/sso/sso_map/sso_pub.shtml The Interactive SSO report: https://ciwqs.waterboards.ca.gov/ciwqs/readOnly/PublicReportSSOServlet? reportAction=criteria&reportId=sso_main The current report was generated with data as of: Saturday, January 04, 2025 Regional Boards are in the process of entering backlogged data. As a result, data may be incomplete. 1/5/25, 6:28 AM California Integrated Water Quality System (CIWQS 100.0) - Build Number: mainTrunk.mm.dd.yyyy.1 https://ciwqs.waterboards.ca.gov/ciwqs/readOnly/publicReportSSOPerformance.jsp?wdid=2SSO10168&fromPerformance=true&category=&startDate=&endDate=8/9 ATTY/RESO.0077/CC RESO SEWER SYSTEM MANAGEMENT PLAN - EXHIBIT A REV: 07-14-25 LF Page 265 of 317