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Type of Spill Notification Monitoring Reporting Agency to Notify Category 1 - Within two (2) hours Spill-specific monitoring -Draft Report within 3 business days of -COES Spills to Surface of knowledge of a knowledge of spill WatersCategory 1 spill of Water quality sampling -OCHCA 1,000 gallons or of receiving water within -Certified Report within 15 calendar days of greater, discharging 18 hours of initial spill end date -OC Public Works or threatening to knowledge of spill of discharge to surface 50,000 gallons or -Technical Report: certify within 45 calendar -City waters: greater to surface days after end date for any spill 50,000 gal or waters greater discharging to surface waters -CIWQS Sanitary Notify COES and Sewer System obtain a Notification -Amended Report within 90 calendar days Database Control Number after spill end date Category 2 - As soon as practical Spill-specific monitoring -Draft Report within 3 business days of -OCHCA Spills of 1,000 knowledge of spill Gallons or Greater -CIWQS Sanitary That Do Not -Certified Report within 15 calendar days of Sewer System Discharge to spill end date Database Surface Waters -Amended Report within 90 calendar days after spill end date Category 3 - As soon as practical Spill-specific monitoring -Certified Monthly Report within 30 calendar -OCHCA Spills of 50 Gallons days of the end of the month in which the or Greater and Less spills occur -CIWQS Sanitary than 1,000 Gallons Sewer System That Do Not -Amended Report within 90 calendar days Database Discharge to after the Certified Spill Report due date Surface Waters Category 4 - As soon as practical Spill-specific monitoring -Certified "Category 4 Spills" Statement with -OCHCA Spills of Less than an estimate of number and total volume of all 50 Gallons That Do Category 4 spills per month within 30 -CIWQS Sanitary Not Discharge to calendar days of the end of the month in Sewer System Surface Waters which the spills occurred Database -Certified Report of all Category 4 spills by February 1st after the end of the calendar year in which the spills occur. Lateral Spill - As soon as practical Spill-specific monitoring -Certified "Non-Category 1 Lateral Spills" -OCHA Spills from Privately Statement within 30 calendar days of the end Owned and/or of the month in which the spills occurred -Public Works Operated Laterals That Do Not -Certified Report of all private Lateral spills -CIWQS Sanitary Discharge to by February 1st after the end of the calendar Sewer System Surface Waters year in which the spills occur. Database No Spills N/A N/A -Certified "No Spill" Statement within 30 -CIWQS Sanitary calendar days of the end of the month Sewer System Database REVISION 2.0 (4/23) 22