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Waterproof Well Cover <br /> Ground Surface Waterproof Locking Well Cap <br /> Conductor casing <br /> Monument <br /> Housing Enclosure <br /> Continuous Pour Concrete <br /> 5%Bentonite-Cement <br /> Surface Seal <br /> 4-inch Threaded PVC <br /> Well Casing <br /> Bentonite <br /> 2'minimum (typically) Sanitary Seal <br /> < .. <br /> --- 12-inch Borehole <br /> --- 4-inch Threaded PVC <br /> -_- Slotted Well Screen <br /> ---_ - 1-2 feet Above Water <br /> Bearing Unit <br /> -- Sand Filter Pack <br /> --- to-1 Foot Above Screen <br /> --- Threaded Bottom Cap <br /> Optional Sump/Sediment <br /> Trap <br /> Not to Scale <br /> MONITORING WELL CONSTRUCTION <br /> 11800 South Harlan Road <br /> Lathrop,CA <br /> FIGURE 3 <br /> TRC <br />