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July 28, 1988 AGS Job No. 38012-2 <br /> Former UNOCAL Service Station, Stockton, California <br /> Soil borings b-1 through B-3 were drilled to depths of <br /> r'1 <br /> approximately S0 feet, or 20 feet below the upper zone of <br /> saturation. All drill cuttings generated were left at the site. <br /> Disposal of the soil remains the responsibility of UNOCAL. <br /> Applied GeoSystems can arrange to have the soil removed to an <br /> appropriate disposal facility with the authorization of UNOCAL. <br /> s.. <br /> MONITORING WELL CONSTRUCTION <br /> Monitoring wells MW-1 through MW-3 were constructed in borings <br /> B-1 through B-3 using thread-jointed, 2-inch-inner-diameter, <br /> Schedule 40 polyvinyl chloride (PVC) casing. No chemical <br /> cements, glues, or solvents were used in well construction. The <br /> screened portion of the wells consists of factory--perforated <br /> casing with 0.020-inch-wide slots. <br /> The well screen extends from the total depth of the well to <br /> approximately 10 feet above the upper zone of saturation to allow <br /> sampling at the air/water interface in the formation during <br /> seasonal fluctuations of ground-water levels. The base of each <br /> well was fitted with a threaded FVC cap, and the top of each well <br /> was fitted with a watertight locking cap. The annular space of <br /> the well was packed with sorted sand to approximately 3 feet <br /> 11 <br /> Applied GeoSysAerns <br />