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