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0 a <br /> Survey Point - Locking Cap <br /> Locking Steel Shroud <br /> Concrete Pad <br /> Well Casing Bentonite Grout <br /> Annular Space <br /> Threaded Coupling <br /> Bentonite Seal <br /> Well Screen = <br /> Filter Pack <br /> Sediment Sump <br /> Figure 6. <br /> ER 5 Monitor Well <br /> Environmental Risk <br /> Services Corporation Construction Schematic <br />