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GROUND SURFACE DEPTH FROM <br /> STEEL ENCLOSURE GROUND SURFACE <br /> (FEET) <br /> CONCRETE PAD LOCKABLE CAP <br /> 0 TOP OF RISER PIPE .5' <br /> TOP OF GROUT 1 ' <br /> GROUT THICKNESS <br /> 55' <br /> TOP OF SEAL 56' <br /> SEAL THICKNESS <br /> 2' <br /> TOP OF SAND PACK 58' <br /> TOP OF SCREEN 60 <br /> SCREEN LENGTH 20' <br /> CASING DIAMETER 6" <br /> SAND THICKNESS CASING TYPE SCH 80 PVC <br /> 22' SLOT SIZE .01 " <br /> BOTTOM OF SCREEN 80' <br /> BOTTOM OF SILT TRAP 85 <br /> T��BOREHOLE DEPTH 85 <br /> WELL NUMBER EW-12B & EW-11B <br /> DATE INSTALLED <br /> SURFACE ELEVATION PROJECT <br /> CASING ELEVATION DRILLER <br /> FIGURE 4 <br /> EXTRACTION WELL CONSTRUCTION <br /> FRENCH CAMP. CALIFORNIA <br /> ..nnrn r. r/u 17� P. MA/-11R <br />