Item 07 - Sewer System Management Plan 2025 Update

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STATEWIDE SANITARY SEWER SYSTEMS GENERAL ORDER 2022-0103-DWQ o Photographs illustrating the spill origin, conveyance system entrance and exit, conditions; the extent and reach of the spill, drainage receiving water, and post -cleanup site o Diagram showing the spill failure point, appearance point(s), the spill flow path, and ultimate destinations; o Detailed description of the methodology employed, and available data used to calculate the discharge volume and, if applicable, the recovered spill volume; o Detailed description of the spill cause(s); o Description of the pipe material, and estimated age of the pipe material, at the failure location; o Description of the impact of the spill; o Copy of original field crew records used to document the spill; and o Historical maintenance records for the failure location. 2. Enrollee's response to the spill: o Chronological narrative description of all actions taken by the Enrollee to terminate the spill; o Explanation of how the Sewer System Management Plan Spill Emergency Response Plan was implemented to respond to and mitigate the spill; and o Final corrective action(s) completed and a schedule for planned corrective actions, including: ■ Local regulatory enforcement action taken against an illicit discharge in response to this spill, as applicable, ■ Identifiable system modifications, and operation and maintenance program modifications needed to prevent repeated spill occurrences, and ■ Necessary modifications to the Emergency Spill Response Plan to incorporate lessons learned in responding to and mitigating the spill. 3. Water Quality Monitoring, including at minimum: o Description of all water quality sampling activities conducted; o List of pollutant and parameters monitored, sampled and analyzed; as required in section 2.3 (Receiving Water Monitoring) of this Attachment; o Laboratory results, including laboratory reports; o Detailed location map illustrating all water quality sampling points; and o Other regulatory agencies receiving sample results (if applicable). 4. Evaluation of spill impact(s), including a description of short-term and long-term impact(s) to beneficial uses of the surface water. ATTACHMENT E1 — NOTIFICATION, MONITORING, REPORTING AND RECORDKEEPING REQUIREMENTS December 6, 2022 E1 - 11