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of Santa Ana <br />Section 6: Spill Emergency Response Plan <br />results in a discharge to a surface water, or a drainage conveyance system that discharges to <br />surface waters when the sewage is not fully captured and returned to the sanitary sewer <br />system or disposed of properly. <br />■ Category 2: a spill of 1,000 gallons or greater, from or caused by a sanitary sewer system failure <br />or blockage, that spills out of a lateral and does not discharge to a surface water. <br />Category 3: a spill of equal to or greater than 50 gallons and less than 1,000 gallons, from or <br />caused by a sanitary sewer system failure or blockage, that spills out of a lateral and does not <br />discharge to a surface water. <br />■ Category 4: a spill of less than 50 gallons, from or caused by a sanitary sewer system failure or <br />blockage, that spills out of a lateral and does not discharge to a surface water. <br />The City has procedures for conducting water quality sampling and preparing a Spill Report for any <br />Category 1 and Category 2 spills. Per WDR requirements, the City shall submit a draft Spill Report to <br />the online CIWQS database within 3 business days of the City's knowledge of a Category 1 spill; and the <br />City shall submit a Certified Spill Report to the CIWQS within 15 calendar days. <br />The City shall report and certify all Category 3 and Category 4 spills to the online CIWQS database <br />within 30 calendar days after the end of the month in which spills occurred. <br />The City also has procedures for conducting water quality sampling and preparing a Spill Technical <br />Report for any Category 1 spill in which 50,000 gallons or greater are spill to surface waters. For spills <br />of this volume, the City shall submit a Spill Technical Report to the CIWQS database within 45 calendar <br />days of the spill end date. <br />Annually, the City will review and assess the effectiveness of its SERP, and update the Plan as needed. <br />6.1.1 Supporting Documents <br />The following documents allow the City to comply with the spill emergency response plan requirements of the <br />WDR Order, and are attached as appendices. <br />Spill Emergency Response Plan, City of Santa Ana, Water Resources Division, Appendix C. <br />2025 6-2 <br />