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<br /> <br />City of Redwood City Page 32 <br />Sewer System Management Plan, March 2018 Element IV <br />crew will assess and report if the lateral needs to be repaired or replaced, and with what urgency. <br />Lateral CCTV inspections and findings are documented via Hiperweb work orders. Information <br />from these work orders is entered, compiled, and tracked in Hiperweb. Approximately four or <br />five laterals are repaired or replaced each week totaling 200 to 250 per year. <br />A copy of a door hanger that explains the City’s response to a service lateral request is included <br />in the Appendix IV-6. The door hanger is available in both English and Spanish, and can be used <br />to communicate follow-up instructions to the property owner if they are not available. <br />IV-8 Rehabilitation and Replacement Program <br />This section describes the City’s on-going process for identifying, prioritizing, and implementing <br />the sewer pipeline and lift station rehabilitation and replacement program. <br />IV-8.1 Sewer Pipeline and Manhole Inspection Condition Assessment <br />The City has implemented a multi-year program to perform CCTV inspection of all sewer <br />pipeline segments and visual inspection of all sewer manholes. The City performs CCTV <br />inspection utilizing a CCTV contractor. CCTV inspections are documented utilizing the National <br />Association of Sewer Service Companies (NASSCO) Pipeline Assessment Certification Program <br />(PACP) inspection ratings. Inspection data is collected and stored in WinCan V8, a <br />commercially available CCTV inspection software. The City maintains a master CCTV database <br />repository of all sewer pipeline inspections on the Departments shared network drive. Inspection <br />of the sewer system is performed by sewerage catchment basins and prioritized based on <br />inflow/infiltration factors documented in the August 2008 Redwood City Sanitary Sewer Master <br />Plan as updated in the 2013 Sewer Master Plan Revisions by West Yost shows the City’s sewer <br />basins Figure IV-3, which are the basis for selecting groups of sewer pipeline and manholes for <br />CCTV and visual inspection. <br /> <br /> <br />Figure IV-3: Redwood City Sewer Basins <br />The City has been performing a baseline inspection of all sewer pipeline and manholes over a <br />seven-year period. The inspection schedule for each meter basin is shown in Appendix IV-7. <br />5G <br />5H <br />5D <br />5E <br />7 <br />2 <br />DT2 <br />86 <br />5A <br />5F <br />3 <br />4 <br />5B <br />9 <br />5C <br />1 <br />RWS-WEST <br />RWS-NORTHWEST <br />RWS-EAST <br />RWS-CENTRALRWS-SOUTH <br />C04 <br />DT <br />SEAPORT <br />2009/2010 <br />2013/2014 <br />2008/2009 <br />2009/2010 <br />2013/2014 <br />2014/2015 <br />2012/2013 <br />2010/2011 <br />2011/2012 <br />2012/2013 <br />2011/2012 <br />2011/2012 <br />2007/2008 <br />2015/2016 <br />2012/2013 <br />2014/2015 <br />2015/2016 <br />RWS-WEST <br />RWS-NORTHWEST <br />RWS-NORTH <br />RWS-EAST <br />RWS-CENTRAL <br />RWS-SOUTH <br />6.2.A. - Page 40