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4. ENVIRONMENTAL ANALYSIS <br /> 4.8 HYDROLOGY AND WATER QUALITY <br /> Local and Project Site Specific <br /> Data review for this FIR included an inventory of the groundwater wells on the project site and <br /> within approximately one mile of the study area. A total of 10 wells were identified and <br /> groundwater level trends in the project vicinity were based on DWR or USBR water level data. <br /> Background work also included an evaluation of current groundwater conditions for the upper <br /> unconfined aquifer based on exploratory borings drilled at the proposed project site. Table 4.8-2 <br /> shows the groundwater well locations relative to the proposed project,the well identification <br /> number,and aquifer source. Groundwater well locations relative to the project site are shown in <br /> Figure 4.8-3. <br /> TABLE 4.8-2 <br /> GROUNDWATER WELLS IN THE PROJECT VICINITY <br /> Distance from <br /> State Well Well Depth Aquifer the Project Site Direction from <br /> Number' (feet) Classification' (feet) the Project Site <br /> 4S/6E-10R001 250 Unconfined 5,280 E <br /> 4S/6E-05A001 N/A Unconfined t00 W <br /> 4S/6E-15RO01 165 Unconfined 6,000 SE <br /> 4S/6E-09B001 N/A Confined 2,200 SE <br /> 4S/6E-10E001 770 Confined 300 S <br /> 4S/6E-08R001 310 Confined 1,200 SW <br /> i <br /> �K4S/6E-04N001 630 Confined On site N <br /> 4S/6E-08L002 N/A Confined 1,500 W <br /> i <br /> y• ' �f 4S/6E-04H001 470 Confined On site N <br /> J <br /> 4S/6E-056001 530 Confined 1,400 W <br /> r <br /> a All wells listed are in Township 04 South,Range 06 Fast. <br /> b Condor Earth Technology,1992. <br /> N/A Data not available. <br /> SOURCE: MWA and ESA,1993. ,a <br /> Groundwater was encountered during exploratory drilling at the proposed project site at y <br /> elevations of approximately 57 to 85 feet above msl or equivalently, at depths of 83 to 120 feet <br /> below the surface. These measurements do not necessarily represent long term water table <br /> conditions but rather,the water table condition at the time of the measurements. These <br /> encountered groundwater depths are consistent with historical DWR water level measurements <br /> in a water table well located approximately 100 feet west of the proposed project site(4S/6E- <br /> 5A01). The hydrograph for this well is shown in Figure 4.8-4. The depth to ground water in <br /> this well has fluctuated between 85 feet and 110 feet above msl during approximately 40 years j <br /> .r <br /> RMC Pacific Vemalis Quany Mining and Reclamation Project 4.8-8 ESA/203015 J <br /> Adntinisnabw theft EIR March 2004 <br />