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• r <br /> 18" <br /> Steel surface casing 4, 2-inch diameter, Schd 80 PVC wells to be installed <br /> 14"OD in a single borehole. Two inch spacing to be maintained <br /> between wells and borehole. Grout to be sodium <br /> — bentonite 30% solids pumped through Tremie pipe into <br /> °0�Jo <br /> 20' borehole. Sand to be#3 Monterey sand emplaced <br /> o^o <br /> >op <br /> through Tremie. <br /> Conductor <br /> casing A—Concrete <br /> Vic? <br /> TOP VIEW <br /> Steel surface <br /> 0 <br /> casing o ° Concrete <br /> o 000co o ,moo° <br /> �Go�01 � GopU <br /> _ oOOV <br /> —50' <br /> Sodium 'tea Sodium <br /> bentonite �� bentonite <br /> Qaoc O� o grout <br /> grout °o , o <br /> c0 � <br /> X <br /> x--12 -1/4" <br /> Von'00 <br /> 2-inch <br /> diameter <br /> #3 Monterey < Schd 80 PVC well <br /> sand <br /> 200' 2-inch spacing maintained between wells, surface <br /> casing and borehole. <br /> 7/8 <br /> —400' Commercially available centralizers <br /> emplaced within sodium bentonite <br /> grout seal <br /> —600' Note: PVC wells will be installed under tension to hold <br /> them straight in the borehole. <br /> Figure 2. Proposed design for multiple-well site at Stockton East Water District, Stockton, California. <br />