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ONE BROADWAY PLAZA PROJECT EIR ADDENDUM <br />CITY OF SANTA ANA <br />5. Environmental Analysis <br />The Certified EIR (Geology and Soils Section) found that the depth of groundwater in the vicinity of the <br />Project Site is 80 to 85 feet below ground surface. The Approved Project would require foundation piles that <br />could extend to depths of 60 to 80 feet below ground surface, which could extend into the groundwater. The <br />Certified EIR identified a mitigation measure would reduce impacts to groundwater to a less than significant <br />level. <br />The Initial Study prepared for the Certified EIR found that the Project Site is not near a large body of water <br />that would generate tsunamis or seiches. The Certified EIR determined that the Project Site is outside of an <br />area that could flood. The Approved Project would not result in significant adverse impacts related to <br />placement of structures in a flood zone. <br />5.10.2 Impacts Associated with the Proposed Project <br />Would the Proposed Project: <br />Less Than <br />Significant <br />Substantial <br />Impact/No <br />Substantial <br />Change in <br />New <br />Changes or <br />Change in <br />Circum- <br />Information <br />New <br />Project <br />stances <br />Showing New <br />Information <br />Requiring <br />Requiring <br />or Increased <br />Requiring <br />Major EIR <br />Major EIR <br />Significant <br />Preparation of <br />Environmental Issues <br />Revisions <br />Revisions <br />Effects <br />an EIR <br />No Impact <br />a) Violate any water quality standards or waste <br />discharge requirements or otherwise <br />substantially degrade surface or ground <br />X <br />water quality? <br />b) Substantially decrease groundwater <br />supplies or interfere substantially with <br />groundwater recharge such that the project <br />X <br />may impede sustainable groundwater <br />management of the basin? <br />c) Substantially alter the existing drainage <br />pattern of the site or area, including through <br />the alteration of the course of a stream or <br />river or through the addition of impervious <br />surfaces, in a manner which would: <br />(i) result in a substantial erosion or siltation <br />on- or off -site; <br />(ii) substantially increase the rate or amount <br />of surface runoff in a manner which <br />X <br />would result in flooding on- or offsite; <br />(iii) create or contribute runoff water which <br />would exceed the capacity of existing <br />or planned stormwater drainage <br />systems or provide substantial <br />additional sources of polluted runoff; or <br />(iv) impede or redirect flood flows? <br />d) In flood hazard, tsunami, or seiche zones, <br />risk release of pollutants due to project <br />X <br />inundation? <br />Page 62 PlaceWorks <br />