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r of Santa Ana Section 4: operations and Maintenance Pro <br />location of all sewer mains, manholes and lift stations, is deployed to collection system 0 &M staff using field <br />tablets. This mobile system provides up -to -date system maps as well as historic system information such as <br />construction plans, asset age, known defects, and maintenance frequencies. Where mapping errors or <br />omissions are identified by field crews, the system provides the ability to capture and relay the corrections to <br />the City's engineers for review and where appropriate, revision to the GIS database. Figure 4 -1, City of Santa <br />Ana Sewer System Map, is a composite rendering of a sewer system map generated from the City's GIS. <br />Figure 4 -1, City of Santa Ana Sewer System Map <br />0 0�.5 1 <br />MIle3 <br />4.2.1.1 Storm Drain System <br />The locations of all the storm water conveyance facilities are available to field crews as a separate GIS layer <br />which can be overlaid with collection system mapping layers to reveal important relationships between the <br />two systems. While not responsible for the C &M of the storm drain system, City 0 &M staff is trained to <br />understand the storm drainage network to supplement SSO response actions. <br />April 2014 <br />4 -2 <br />55CC -23 <br />