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replaced or rehabilitated;(4)identification of assets remaining in critical condition that have not been repaired, replaced or rehabilitated;(5) identification of assets newly determined to be in critical condition;(6)proactive rehabilitation and replacement planning for critical condition assets;(7)detailed cost analysis;and (8)review of CIP planning to address critical assets. 12.County Sewage Collection Systems Preventative Maintenance Program:The COH will use its best efforts to eliminate sewage spills from force mains,pumps stations,gravity lines and WWTPs.The COH will continue to work toward reducing the number,frequency,and • duration of spills. a. Spill Response. By July 1,2024,the COH shall develop and submit a Spill Response Plan for Force Mains and Gravity Mains.The Spill Response Plan shall be developed with regional considerations and include:(1)Procedures for immediate response to contain spills and minimize spill volume;(2)Standard procedures for estimating spill volume;(3)Standard operating procedures for reporting spills. • b. Sewer Line Operations and Maintenance Preventative Maintenance Program Plan. By July 1,2025,the COH shall develop and submit a Sewer Line Operations and Preventative Maintenance Program Plan.The Sewer Line Plan shall include: i. Initial Condition Assessment:A condition assessment of all gravity sewer lines shall be completed by CCTV by October 1,2028.The assessment shall utilize an industry standard,such as the Pipeline Assessment process developed by the National Association of Sewer Service Companies(NASSCO)or similar procedure.The sewer line condition rating shall be integrated into the AMP.A condition assessment of all force mains shall be completed by October 1,2030.The COH shall propose to EPA and DOH which industry standard assessment tool will be followed within 18 months after the EPA Order is executed. ii. Regular Inspection/cleaning:A schedule for regular inspections and/or cleaning for each asset will be established and recorded in the AMS as it is assessed.The plan will establish what factors are used to determine the schedule and may include age,construction material,condition,and the presence of defects.The plan shall also identify priority areas for more frequent inspections and/or cleaning based on relevant information, including citizen reports,prior inspections and cleaning,spill reports,the history of spills,the incidence of problems with fats,oil,and grease(FOG)and root blockages,and the design and history of the sewer lines.The COH shall propose to EPA and DOH the inspection schedule . and frequency for force main inspections and cleaning,where appropriate,within 6-months of after the initial assessment. • In re County of Hawai'1,Docket No.CWA-309(a)-24-003:Appendix 1 Page 8 of 9