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WATERWORK <br /> WATER PROOF WELL BOX <br /> GROUND LEVEL <br /> LOCKING WELL CAP <br /> zw <br /> 3 FT. wN <br /> LJ LJ V) <br /> CEMENT SEAL <br /> 2 T. WELL CASING <br /> BENTONITE SEAL <br /> 2 FT. <br /> FILTER PACK <br /> 23 FT. <br /> WELL SCREEN <br /> BORING WALL <br /> NOT TO SCALE 4r30 TD END CAP <br /> FIGURE <br /> TYPICAL VAPOR EXTRACTION WELL CONSTRUCTION DETAIL <br />