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2401 <br /> i 2" <br /> r <br /> MINIMUM 4" THK <br /> CONCRETE PAD <br /> Ni ' } # <br /> _ TRAFFIC BOX <br /> ' PLAN <br /> MINIMUM 4" THK CONCRETE PAD <br /> EXISTING GRADE <br /> e <br /> TRAFFIC BOX <br /> LOCKING WELL CAP <br /> i <br /> 8-INCH DIAMETER HOLLOW <br /> STEM AUGER BOREHOLE <br /> CEMENT SEAL <br /> 2-INCH BLANK PVC CASING, <br /> FLUSH THREADED SCHEDULE 40 <br /> BENTONITE PELLET SEAL., <br /> ' r MIN 2-FOOT THICK <br /> NOTE. EXISTING RIVETS IN TRAFFIC BOX <br /> 1 ARE TO BE REMOVED AND REPLACED WITH <br /> 3"X114" BOLTS EXTENDING OUTWARD INTO <br /> CONCRETE PAD FOR ADDITIONAL SUPPORT <br /> CLEAN IMPORTED COARSE <br /> AQUARIUM SAND <br /> r <br /> 2-INCH SLOTTED PVC CASING, <br /> FLUSH THREADED SCHEDULE 40, <br /> MIN 0.030 SLOT <br /> PVC BOTTOM CAP <br /> SECTION NOT TO SCALE <br /> Figure 1. Typical Vapor Extraction Well Construction <br />