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Revised LFR Levine Fricke groundwater into the SVEortia p n of the well The well head will be secured with a locking, waterproof well cap and tamper-resistant H-20 traffic-rated vault Figure 10 depicts the proposed well construction details Partially Screened Well: The partially screened extraction wells, PSEW-4, 5, and 6 and PSEW-7, 8, and 9 will be built in a borehole drilled using hollow-stern augur drilling techniques because these wells are not located in vadose zone source areas They will be constructed using 4-inch-diameter PVC casings Well Cluster PSEW-4, S,and 6: Well cluster PSEW-4, 5, and 6 will each be constructed with one shallow well screen within the vadose zone and one deep well screen within the saturated zone, as follows- • PSEW-4 will have one well screen from 10 to 20 ft bgs and the second from 50 to 75 ft bgs • PSEW-5 will have one well screen from 20 to 30 ft bgs and the second from 50 to 75 ft bgs • PSEW-6 will have one well screen from 30 to 40 ft logs and the second from 50 to 75 ft bgs Well Cluster PSEW-7, 8,and 9: PSEW-7 and PSEW-8 will be constructed with well . screens from 10 to 20 ft bgs and 20 to 30 ft bgs PSEW-9 will have two well screens, one from 30 to 40 ft bgs within the vadose zone, and the lower well screen from 50 to 75 ft bgs within the saturated zone Vadose Zone Well Screens: The screen intervals will be constructed so as to rwnumze the potential for cross contaimnation, and to mulinti2e potential for air leakage from the ground surface Well screens will consist of 0 I25-inch slots and medium-grained sand filter pack to maximize anflow rates Saturated Zone Well Screens: Each of the wells in well cluster PSEW-4, 5, and 6 and well PSEW-9 will have well screens between 50 and 75 ft legs The shallow and the deep screened intervals will be separated by a blank section of PVC pipe, and a packer will be installed to mitigate the potential for flow of groundwater alto the soil vapor extraction portion of the well The well head will be secured with a locking, waterproof well cap and tamper-resistant H-20 traffic-rated vault, 5.2 SVETS Installation for Pilot Testing Purposes As discussed above, LFR is proposing to perform a pilot test using the proposed SVE wells As such, LFR proposes to install a SVE system to treat extracted vapor prior to atmospheric discharge The initial treatment system for the Phase I test will be a vapor phase carbon adsorption system_ Mr SVEGSLodi rev-M123 clue Ifr Page I3 Ob/ZT d eC T 0091760E T 01 9060 ES9 Otis 3AO I N-J 3N I n31 X131 N_j LE 9T Eo, 60 7nr