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c) Would the project substantially alter the existing drainage pattern of the site or area, including <br />through the alteration of the course of a stream or river, in a manner which would result in substantial <br />erosion or siltation on or off site, or substantially increase the rate or amount of surface runoff in a <br />manner which would result in flooding on or off-site? (No Substantial Change from Previous <br />Analysis) <br />The FEIR identified impacts to the existing and proposed drainage for the proposed project and <br />included mitigation measures to reduce impacts to hydrology and water quality. No changes have <br />occurred in this area from the analysis provided in the FEIR. Therefore, the FEIR remains adequate <br />and complete for this topic. <br />d) Would the project substantially alter the existing drainage pattern of the site or area, including <br />through the alteration of the course of a stream or river, or substantially increase the rate or amount <br />of surface runoff in a manner which would result in flooding on- or off-.site? (No Substantial Change <br />from Previous Analysis) <br />The FEIR identified impacts to hydrology and water quality that would result from project <br />implementation. No changes have occurred in this area from the analysis provided in the FEIR. <br />Therefore, the FEIR remains adequate and complete for this topic. <br />e) Would the project create or contribute runoff water which would exceed the capacity of existing or <br />planned storm water drainage systems or provide substantial additional sources of polluted run-off? <br />(No Substantial Change from Previous Analysis) <br />The FEIR identified impacts due to runoff that would result from project implementation including the <br />determination of adequate capacity within storm water drainage systems. No changes have occurred in <br />this area from the analysis provided in the FEIR. Therefore, the FEIR remains adequate and complete <br />for this topic. <br />J) Would the project otherwise substantially degrade water quality? (No Substantial Change from <br />Previous Analysis) <br />The FEIR addressed potential impacts to water quality and included mitigation measures HW-1 <br />through HW-11 which will be implemented to reduce potential impacts. No changes have occurred in <br />this area from the analysis provided in the FEIR. Therefore, the FEIR remains adequate and complete <br />for this topic. <br />g) Would the project place housing within a 100 year flood hazard area as mapped on a federal Flood <br />Hazard Boundary or Flood Insurance Rate Map or other flood hazard delineation map? (No <br />Substantial Change from Previous Analysis) <br />The FOR identified impacts to hydrology and water quality that would result from project <br />implementation. As stated in the FEIR, the project is not located in a 100-year flood hazard area. No <br />changes have occurred in this area from the analysis provided in the FEIR. Therefore, the FEIR <br />remains adequate and complete for this topic. <br />h) Would the project place within a 100 year flood hazard area structures which would impede or <br />redirect flood flows? (No Substantial Change from Previous Analysis) <br />The FEIR identified impacts related to flood hazards that would result from project implementation. As <br />noted in g) above, the project is not located in a 100-year flood hazard area. No changes have occurred <br />in this area from the analysis provided in the FEIR. Therefore, the FEIR remains adequate and <br />complete for this topic. <br />MacArthur Place South EIR - 2011 Addendum <br />31 <br />75B-76