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ORGANIZATION © 2025 Fischer Compliance, LLC. All rights reserved. Sewer System Management Plan licensed for Redwood City use only Page 20 of 59 2.3. Chain of Communication for Reporting Spills Chain of Communications for Reporting and Responding to Spills Step No. Staff Responsible Description of Activity 1 Public Works Services Admin (business hours) or Police Dispatcher (non- business hours) Spill Information Received: Receives service calls originating from the public, other agencies, or from sources within the City; documents caller-provided information including caller contact information (if not anonymous). 2 Public Works Services Admin or Police Dispatcher Notify Sewer Service On-Call Worker: Call taker or dispatcher contacts the Sewer Service On-Call Worker. Contact may occur via phone call, text message, or pager communication. 3 Sewer Service On- Call Worker Sewer Service On-Call Worker Responds to Call: Sewer Service On–Call Worker obtains information from Admin or Dispatcher. If the Sewer Service On-Call Worker does not respond, the Utilities Field Supervisor is contacted and is responsible for ensuring a Sewer Service On-Call Worker responds. 4 Sewer Service On- Call Worker On-Site Assessment: Upon arriving at the call site, the Sewer Service On-Call Worker conducts a preliminary assessment of spill extent and suspected cause. Photographs of spill source and extent of spilled sewage may be taken, if possible. The On-Call Worker will request additional equipment and staff as circumstances dictate. The Utilities Field Supervisor is notified immediately if the spill meets conditions requiring the two-hour notification to regulatory agencies. If the spill is 1,000 gallons or greater and reaches or is likely to reach Waters of the State, the Sewer Service On-Call Worker will contact the Utilities Field Supervisor. 5 Sewer Service On- Call Worker Repair, Divert, Contain and Clean: If the spill is from City maintained infrastructure, On-Call Worker and field crew(s) (as appropriate) stop the spill, divert the spill from sensitive areas, contain and return the spill to the system if possible, and assign staff to post signage, as necessary, and perform necessary clean-up activities. If the spill is not from City maintained infrastructure, the property owner is notified and such steps as possible are taken to minimize environmental and health impacts. Photographs are taken of all steps implemented, if possible. 6 Utilities Field Supervisor Notification and Coordination: If the spill is 1,000 gallons or greater and discharges or threatening to discharge to Waters of the State, the Utilities Field Supervisor contacts California Governor’s Office of Emergency Services (Cal OES) and San Mateo County Environmental Health and communicates any further direction to the field crew. If 50,000 gallons or greater is discharged to surface waters, the Utilities Field Supervisor contacts the Utilities Specialist for sample collection, additional investigation and possible clean-up. 7 Utilities Field Supervisor Additional Resources Required: If needed, the Utilities Field Supervisor obtains necessary resources from other local agencies and/or private service companies. 8 Sewer Service On- Call Worker Documentation: The On-Call Worker will write up the appropriate sanitary sewer spill report containing all relevant information regarding the incident. The information is provided to the Utilities Field Supervisor for verification and entry into CIWQS. ATTY/RESO.0077/CC RESO SEWER SYSTEM MANAGEMENT PLAN - EXHIBIT A REV: 07-14-25 LF Page 27 of 317