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7 of Santa Ana Section II: Sewer 5 Plan Section II: Sewer System Management Plan Requirements The City's Public Works Agency, Water Resources Division, is responsible for maintaining the citywide water and sewer system. The agency serves a population of approximately 332,725 people and is responsible for maintaining 400 miles of sewer main, 7,000 sewer manholes, two sewage lift stations, and two force mains. The majority of the City's sewer mains range from 6" -12" in diameter, with several as large as 39" in diameter, the majority of which is proactively cleaned on an 18-month cycle. Additionally, the City provides sewer lateral replacement, customer service, identifies illegal connections to the sewer system, and addresses sewer blockages. While City is not responsible for maintaining the 46,000 private sewer laterals (Municipal Code Section 39-50.1.b), a sewer repair/replacement program is in place where the City will perform corrective repairs on or replace the lower lateral. The City has established and implemented the necessary programs to maintain all aspects of their sewer system in good working order and to reduce the number and severity of sanitary sewer overflows (SSOs). The City monitors the effectiveness of these programs throughout the year and makes the necessary modifications to correct any deficiencies. The City has established sufficient sewer designs, regularly evaluatesthe condition and capacity of its sewer system, and has implemented an effective FOG Control Program. Additionally, the City has identified problematic sewer mains that are cleaned on a more frequent basis (enhanced maintenance locations). In addition to proactive and preventive maintenance practices, the City also identifies areas of the sewer system in need of repair and/or replacement and prioritizes corrective measures for these based on asset risk and resource factors. The staff supporting the operation and maintenance of the sewer system undergoes training to perform such activities and continue development of their skills through participation in external and internal training opportunities. The elements and provisions established in the City's Sewer System Management Plan (SSMP) are based on the requirements established in the State Water Resources Control Board's Order No. 2006-0003-DWQ, revised MRP WQ 2008-0002-Exec, and MRP WQ 2013-0058-Exec. All federal and state agencies, municipalities, counties, districts, and other public entities that own and operate sanitary sewer systems greater than one mile in length that collect and/or convey untreated or partially treated wastewater to a publicly owned treatment facility in the State of California, are required to comply with the terms established in this order. The City's SSMP and maintenance and management program complies with this established order, and also provides the necessary measures to reduce and prevent SSOs as well as mitigate the effects of the SSOs that do occur. As stated in the State Water Resources Control Board's Order No. 2006-0003-DWQ, the City must meet the following fifteen (15) provisions: 1. The City must comply with all conditions of Order No. 2006-0003-DWQ. Any noncompliance with Order No. 2006-0003-DWQ constitutes a violation of the California Water Code and is grounds for enforcement action. 2. It is the intent of the State Water Board that sanitary sewer systems be regulated in a manner consistent with the general WDRs. Nothing in the general WDRs shall be: April 2020 II-1 19F-8