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SSO Annual Report for the City of Redwood City 3 <br /> <br />Table 3. Causes of SSOs <br />Cause of SSO Number Percent of Total <br />Blockage: <br /> Roots <br /> Grease <br /> Debris <br /> Debris from Laterals <br /> Vandalism <br /> Animal Carcass <br /> Construction Debris <br /> Multiple Causes <br /> Subtotal for Blockage <br />Infrastructure Failure <br />Inflow & Infiltration <br />Electrical Power Failure <br />Flow Capacity Deficiency <br />Natural Disaster <br />Bypass <br />Cause Unknown <br />Total <br /> <br />Location of SSOs <br />[Summarize the general geographical locations where SSOs are occurring. Provide narrative <br />text describing whether any SSOs are tending to occur in the same location and if so, what is <br />being done to prevent those SSOs in the future. Note the number of locations with more than one <br />SSO in the past year] <br /> <br />SSO Trends <br />[Include a bar chart or graph showing a comparison of data for the current reporting period <br />with previous reporting periods. The example below is from the City of Redwood City’s Annual <br />Report of SSOs submitted March 14, 2008.] <br /> <br />Example Figure 2. Totals Comparison 2005 through 2007 <br /> <br />6.2.A. - Page 227