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CEMENT SEAL <br /> I-INCH PVC CASING <br /> T RAFFIC RATED BOX OR VAULT <br /> PLAN <br /> a ' <br /> 1 ; <br /> { T <br /> WELL CAP <br /> EXISTING GRADE <br /> i <br /> STEEL TRAFFIC BOX OR VAULT <br /> HOLLOW STEM AUGER BOREHOLE <br /> CEMENT SEAL <br /> i-INCH BLANK PVC CASING; <br /> i FLUSH THREADED SCHEDULE 40 <br /> I <br /> N <br /> I� <br /> f <br /> GROUNDWATER LEVEL (TYPICAL) } <br /> BENTONITE PELLET SEAL <br /> I � <br /> CLEAN IMPORTED SAND I <br /> (#3 OR EQUIVALENT) <br /> I 1-INCH SLOTTED PVC CASING, <br /> i FLUSH THREADED SCHEDULE 40 <br /> �. PVC BOTTOM CAP <br /> SECTION NOT TO SCALE <br /> FIGURE 2. TYPICAL AIR SPARGING WELL <br /> CONSTRUCTION <br />