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10/17/2007 14:37 FAX 2094683183 SJC_COMM_BEV 008/013 <br /> v � <br /> 3H,"Groundwater and Groundwater Quality,"on pages 31-1-8 through 314-13 of the <br /> Draft FIR. The following impacts are disclosed: <br /> • Impact GW-l: Operation-Related Impacts on Groundwater Quality(Less <br /> than Significant with Mitigation Incorporated) <br /> • Impact GW-2: Reclamation-Related Impacts on Groundwater Quality(Less <br /> than Significant with Mitigation) <br /> • Impact GW-3: Reductions in Groundwater Levels Caused by Dewatering <br /> (Less than Significant with Mitigation) <br /> • Impact GW-4: Reductions in Groundwater Levels Caused by Consumptive <br /> Use(Less than Significant) <br /> keasibilily.ofpravel_mining re[luires operations to exceed depths of 75 tett,whish will obitdo,7pegb,Jnb',ta'oq♦o�kedw;;, <br /> wdar <br /> J in and/or <br /> st it l a m+vl� <br /> intercept the groundwater table. an Joa um Court has a raved several Conditional 6e1o' aid' <br /> Pt gr +5... 9 t? PP dnaow..tla diow of <br /> Use Permits for aggregate mining and/or reclamation m the same area as the Proposed <br /> srro'ls�so`;•r•imx�r�,tr.„ <br /> Project.Detailed analysis of groundwater conditions,includingthe site ecific and <br /> cumulative impacts of groundwater pumping for quarry use,were including in the EMs R••• i <br /> for the Granite Construction quarry and the RMC Pacific quarry.Both of these operations <br /> mine deeper than the groundwater table.The Draft EIR discusses the fact that shallow <br /> groundwater in th,q PLoject area is impaired dlie to both natwal ttcologic conditions and <br /> agriculture(Page 3.H-2). Coustituents present at elevated levels in the shallow <br /> Mundwater_tan include total dissolved solids,chloride,boron,nitrate,radiological <br /> constituents_and pesticides. <br /> Detailed analvsis of rhe potential for both dry mining And wet mining_to int tt_act <br /> groundwater quality an;presented in the discussions for Impacts GW-1 and GW-2. <br /> Mining below the water table would be conducted in accordance with San Joaquin <br /> County Quarry Excavation Standards Chapter 9,1415 of the County's Title 9 <br /> Development Title(sae page 2-13 of the Draft EIR). Groundwater quality would be <br /> monitored and evaluated in accordance with ASTM standards. lFunuacts are identified, <br /> measures must be taken by the applicant to return roanw&qter%yAYeytn¢ageeline <br /> conditions in accordance with state and federal regulations. In addition the mining pits <br /> mei maintain a minimum setback from adjacent wells to prevent microbiological <br /> impacts,in accordance with County Health Department standards_ Therefore.the EIR <br /> contains analvsis and miti anon tar otcntial impacts to groundwater quality from wet <br /> mining daring both the opeuational period and after raclamation.The impacts on the <br /> groundwater in the area will be minimized by the performance standards listed above. <br /> Response to Comments 2 and 12 provide additional information regarding historical <br /> groundwater data. <br /> Response to Comment 6 <br /> As stated on page 2-12 in Chapter 2,"Project Description,"fill may be brought to the site <br /> as backhaul from job sites;there is no evidence that contaminated materials would be <br /> used as filL Contaminated soils are subject to state and local regulations concerning their <br /> transport and use. The project will comply with 14 CCR 3707 standards for topsoil <br />