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WELL CONSTRUCTION DETAIL <br /> EC <br /> A Total Depth of Boring 20 ft. <br /> M <br /> B Diameter of Boring 8 in. <br /> H Drilling Method Hollow-stem Auger <br /> C Top of Box Elevation ft. <br /> Referenced to Mean Sea Level <br /> Referenced to Project-Datum <br /> 7 D Casing Length 20 ft. <br /> Material Schedule 40 PVC <br /> F E Casing Diameter 2 in. <br /> F Depth to Top Perforations 5 ft_ <br /> G Perforated Length 15 ft. <br /> Perforated interval from 5 to 20 ft. <br /> Perforation Size 0.02 in. <br /> © H Surface Seal from 0 to i ft. <br /> A Seal Materia Concrete <br /> I Backfill from 1 to 3 ft. <br /> Seal Materia Neat Cement <br /> J Seal from 3 to 4 ft. <br /> Seal Materia Bentonite <br /> K K Gravel Pack from 4 to 20 ft. <br /> Pack Materia #3 Sand <br /> G - <br /> L Bottom Seal None ft. <br /> Seal Materia <br /> M Traffic rated well box, locking well cap, and lock <br /> Note: Depths measured from initial ground surface. <br /> L <br /> I <br /> B � <br /> Proposed well Construction Detail FIGURE <br /> Geffler - Ryan., Inc. Former Unocal Service Station#0123 <br /> 6747 Sime Cl.,Suite J (925)551-7555 1034 Central Avenue 3 <br /> Dublin,CA 94568 Tracy,California <br /> JOB NUMBER REVIEWED BY DATE REVISED DATE REVISED DATE <br /> 240073.04 Oct-00 <br />