Item 07 - Sewer System Management Plan 2025 Update

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STATEWIDE SANITARY SEWER SYSTEMS GENERAL ORDER 2022-0103-DWQ 5. Estimated spill start date and time; 6. Date and time the Enrollee notified the California Office of Emergency Services, and the assigned control number; 7. Description, photographs, and GPS coordinates of the system location where the spill originated; o If a single spill event results in multiple appearance points, provide GPS coordinates for the appearance point closest to the failure point and describe each additional appearance point in the spill appearance point explanation field; 8. Estimated total spill volume exiting the system; 9. Description and photographs of the extent of the spill and spill boundaries; 10. Did the spill reach a drainage conveyance system? If Yes: o Description of the drainage conveyance system transporting the spill; o Photographs of the drainage conveyance system entry Iocation(s); o Estimated spill volume fully recovered from the drainage conveyance system; o Estimated spill volume remaining within the drainage conveyance system; 11. Description and photographs of all discharge point(s) into the surface water; 12. Estimated spill volume that discharged to surface waters; and 13. Estimated total spill volume recovered. 3.1.2. Certified Spill Report for Category 1 Spills Within 15 calendar days of the spill end date, the Enrollee shall submit a Certified Spill Report for Category 1 spills, to the online CIWQS Sanitary Sewer System Database. Upon completion of the Certified Spill Report, the online CIWQS Sanitary Sewer System Database will issue a final spill event identification number. The Certified Spill Report must, at minimum, include the following mandatory information in addition to all information in the Draft Spill Report per section 3.1.1 (Draft Spill Report for Category 1 Spills) above- 1 . Description of the spill event destination(s), including GPS coordinates if available, that represent the full spread and reach of the spill; 2. Spill end date and time; 3. Description of how the spill volume estimations were calculated, including at a minimum: o The methodology, assumptions and type of data relied upon, such as supervisory control and data acquisition (SCADA) records, flow monitoring or other telemetry information used to estimate the volume of the spill discharged, and the volume of the spill recovered (if any volume of the spill was recovered), and o The methodology(ies), assumptions and type of data relied upon for estimations of the spill start time and the spill end time; ATTACHMENT E1 — NOTIFICATION, MONITORING, REPORTING AND RECORDKEEPING REQUIREMENTS December 6, 2022 E1 - 9