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gddlb <br /> Bentonite <br /> Plug <br /> a- <br /> ig ' - Backfill <br /> ,.�' .ate� �zz4a� � •" . <br /> Barrier Layer -. <br /> Mark <br /> v <br /> Photo 3: Typical trench backfill of wells EW-40, EW-41 and EW-42 <br />