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Ground surface <br /> Grout -- -- - <br /> (0-114 feet) --- --- -_-- Gravel fill pipe <br /> - Schedule 80 PVC, <br /> -- --- 2-inch (0-118 feet) <br /> --- --- --- Schedule 80 PVC, <br /> _ =- 8-inch well casing <br /> -- --- (0-120 feet) <br /> Bentonite <br /> Transition sand seal (114-117 <br /> (#30 mesh or equivalent) feet) <br /> (117-118 feet) <br /> Sand (filter) pack <br /> (#3 Monterey sand or <br /> equivalent) (118-140 <br /> Type 304 Stainless steel feet) <br /> wire-wrapped <br /> 8-inch screen, <br /> 0.02 in slot <br /> (120-130 feet) Sump <br /> (130-135 feet) <br /> Stainless Steel End Cap <br /> Borehole total <br /> depth (140 feet) <br /> Note: Not drawn to scale <br /> Figure <br /> EWC8 and EWC9 Well Construction Diagram <br /> Groundwater Well Installation Work Plan 0 <br /> Sharpe Army Depot, Lathrop, California <br />