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28 <br />SEWER RATE STUDY I City of Santa Ana, CA <br />The City has also indicated specific areas as "Enhanced Maintenance Locations' (or EMLs). These <br />sections of the sewer network (less than 1 percent of the entire system) exhibit repeated problems with <br />maintenance issues. Although most EMLs are related to issues with Fats, Oils and Grease (FOG), the City <br />staff has indicated that some portion of these may also be a result of structural sags in the sewer lines. <br />Figure B 10 shows a map of the identified EMLs and FSEs. Sewer spill locations (150 spill records listed <br />between 1999 and 2012) were also included for reference since about 43 percent of the spills are listed <br />as grease - related. The staff also indicated that they are planning to conduct further investigations into <br />relating these EMLs to nearby Food Service Establishments (FSEs). Additional review of the spill location <br />data may also be warranted; especially for repeated occurrences. <br />Figure B 11 shows a map of the sewer repairs since 2001 as Indicated in the City's GIS. There are 243 <br />main repair records (impacting about 2.6% of the mains). There were also 1,358 lateral line repairs <br />(impacting about 2.8% of laterals). Repairs were not specifically addressed in his study due to very <br />limited data (mostly listed as a note in the description field). City staff also indicated that main repair <br />location data was primarily used to indicate planned work activities based on the results of CCTV <br />inspections and that they do not indicate an additional level of information about the pipeline condition. <br />[INTENTIONALLY LEFT BLANK] <br />65B -237 <br />NOVEMBER 2014 <br />