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Executive Summary <br /> TABLE ES-1 (CONTINUED) <br /> SUMMARY OF IMPACTS AND MITIGATION MEASURES <br /> Environmental Impact Mitigation Measures Level of Significance <br /> (Level of Significance Prior to Mitigation) After Mitigation <br /> 4.8.2 Accidental spill,leaks,or improper disposal of petroleum 4.8.2 Implement Mitigation Measure 4.11.2. Less than Significant <br /> fuel would increase the potential for degradation of <br /> groundwater quality over the life of the project.This <br /> would be a potentially significant impact.(PS) <br /> 4.8.3 Excavation that disturbs and/or truncates the existing 4.8.3 Priorto the commencement of excavations,the project applicant shall Less than Significant <br /> groundwater well shafts on the project site could increase conduct a comprehensive well survey to locate,identify,and confirm <br /> the potential for contaminants to enter and pollute the all existing groundwater wells on the project site. Information for well <br /> groundwater through the wells.This would be a locations shall be obtained, if available,from DWR,San Joaquin <br /> potentially significant impact.(PS) County Environmental Health Department,Stanislaus County,and <br /> the former property owners.Groundwater wells that will not remain in <br /> operation shall be properly destroyed and removed in accordance <br /> with the DWR Well Standards,depending on location,under permit <br /> and inspection from either the Stanislaus County Department of <br /> Environmental Health or San Joaquin County as per the San Joaquin <br /> County Development Title,Section 9-1115.5(e).The well destruction <br /> shall be designed to create a sanitary seal that would not conduct <br /> vertical water flow in the event that the well is truncated or damaged <br /> during mining operations. <br /> 4.8.4 Groundwater extraction associated with the proposed 4.8.4 No mitigation is required. <br /> project could lower groundwater levels beyond the project <br /> boundaries,causing lower local or regional groundwater <br /> levels that are below the current pumping depths of <br /> existing private or municipal groundwater supply wells. <br /> This would be a less-than-significant impact. (LS) <br /> 4.8.5 Reuse of excavated overburden containing clay and silts No mitigation is required. <br /> combined with equipment compaction of the reclaimed <br /> mine areas could decrease infiltration of surface water <br /> and reduce groundwater recharge from the project site <br /> throughout the life of the project and after reclamation. <br /> This would be a less-than-significant impact.(LS) <br /> Cemex Vernan;Quarry Mining and Reclamation Project ES-14 ESA 1203015 <br /> Final Ew rnenbl Impact Report June 2008 <br />