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Annual Service Contract - page 36 / 43





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Sanitary Sewer Overflows (SSOs)

From the Executive Officer’s Report, 17/17 October 2003, Central Valley Water Board… “In October 2003 the Central Valley Water Board issued a report addressing the Sewage Collection System Spills for the City of Stockton. Since February 2002, the City reported 495 Sanitary Sewage Overflows (SSOs). Of that number, 15 overflowed into surface water bodies. Thirty-three SSOs were over 1000 gallons. The City has provided prompt response and clean up of the sewage spills. However, staff (Water Board) has concerns with the City’s sewer system maintenance and repair/replacement program to prevent sewage spills. Staff has requested that the City develop an SSO Emergency Response Plan, and may consider requiring additional actions to prevent SSOs.” This report covers both Municipal and private vendor operations.

The City Staff has created the required Emergency Response Plan and is in the final stages of revisions and approvals. The report from the Water Board provides a baseline for monitoring future SSOs and whether OMI is providing enough preventative maintenance to address the spill situations. With proper monitoring by the City Municipal Utility Department time will tell if services are being provided at an adequate level.

The following graphs detail how well OMI has dealt with the SSO problem plaguing Stockton (blue = year 1; magenta = year 2)

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