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City of Santa Ana -Park View at Town and Country Manor <br />Draft EIR Hydrology and <br />• REC1 - body contact recreation <br />• REC2 - non - contact water recreation <br />• WARM - warm freshwater habitat <br />• WILD - wildlife habitat <br />Groundwater <br />According to the project Geotechnical Engineering Investigation ( Geotechnologies, Inc. 2009), <br />borings drilled to a depth of approximately 50 feet did not encounter groundwater. Groundwater was <br />encountered at a depth of 88 feet below the ground surface (bgs) in Boring 6, southwest of the <br />proposed main entrance driveway. Geotechnologies states that historic high groundwater elevations <br />have been identified for the project area at 35 feet bgs. <br />4.3.4 - Thresholds of Significance <br />According to the CEQA Guidelines' Appendix G Environmental Checklist, to determine whether <br />hydrology and water quality impacts are significant environmental effects, the following questions are <br />analyzed and evaluated. Would the project: <br />a.) Violate any water quality standards or waste discharge requirements? <br />b.) Substantially deplete groundwater supplies or interfere substantially with groundwater <br />recharge such that there would be a net deficit in aquifer volume or a lowering of the local <br />groundwater table level (e.g., the production rate of pre - existing nearby wells would drop to a <br />level which would not support existing land uses or planned uses for which permits have been <br />granted? <br />c.) Substantially alter the existing drainage pattern of area, including through the alteration of the <br />course of a stream or river, in a manner which would result in substantial erosion or siltation <br />on- or off -site? <br />d.) Substantially alter the existing drainage pattern of the site or area, including through the <br />alteration of the course of a stream or river, or substantially increase the rate or amount of <br />surface runoff in a manner which would result in flooding on- or off -site? <br />e.) Create or contribute runoff water which would exceed the capacity of existing or planned <br />stormwater drainage systems or provide substantial additional sources of polluted runoff? <br />f.) Otherwise substantially degrade water quality? <br />g.) Place housing within a 100 -year flood hazard area as mapped on a federal Flood Hazard <br />Boundary or Flood Insurance Rate Map or other flood hazard delineation map? <br />h.) Place within a 100 -year flood hazard area structures which would impede or redirect flood <br />flows? <br />Michael Brandman Associates 4.3 -5 <br />H\Cl t(PN- JN)b32]b327W3MMVB2]0030 Se 4B Hyd bUadWat Wity.d¢ <br />