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r r I r 1 1 1 i 1 r r i <br /> Table ES-1. Continued Page 5 of 10 <br /> Significance After <br /> Significance Mitigation <br /> Impact without Mitigation Mitigation Measure Incorporated <br /> Impact GEO-7: Wind Erosion during Mining(Wet Pit Less than No mitigation is required — <br /> Operation) Significant <br /> Impact GEO-8: Potential Slope Failure Significant Mitigation Measure GEO-8: Implement the Less than Significant <br /> Recommendations of the Geotechnical Services <br /> Report prepared by Kleinfelder in 2003 and the <br /> Addendum to Geotechnical Services Report prepared <br /> by Kleinfelder in 2004. <br /> Impact GEO-9: Potential Structural Damage and Injury from Less than No mitigation is required — <br /> Development on Expansive Soils Significant <br /> Surface Water,Stormwater,and Water Quality <br /> Impact WQ-1: Construction-Related Water Quality Degradation Less than No mitigation is required — <br /> Significant <br /> Impact WQ-2: Drainage and Surface Water Quality Impacts Less than No mitigation is required — <br /> during Operation and Reclamation Significant <br /> Impact WQ-3: Surface Water Quality Degradation from No Impact No mitigation is required — <br /> Dewatering <br /> Impact WQ-4: Flooding Hazards Less than No mitigation is required — <br /> Significant <br /> Impact WQ-5: Effects of Tsunami or Mudflow Less than No mitigation is required — <br /> Significant <br /> Impact WQ-6: Effects of Seiche Significant Mitigation Measure WQ-6: Prepare a Seiche Less than Significant <br /> Response Plan <br /> Impact WQ-7: Surface Water Supply Impacts during Operation No Impact No mitigation is required — <br /> and Reclamation <br /> Groundwater and Groundwater Quality <br /> Impact GW-1: Operation-Related Impacts on Groundwater Significant Mitigation Measure GW-la: Monitor Groundwater Less than Significant <br /> Quality Quality;Implement Measures to Maintain <br /> Groundwater Levels as Necessary <br /> Mitigation Measure GW-lb: Maintain Well Offsets <br />