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r 6"THK.CONCRETE <br /> PAD <br /> 24" <br /> STANDARD CNI-208 <br /> 12" GR EQUIVALENT VAULT BOX <br /> t-12" <br /> PLAN <br /> 6THK CONCRETE PAD <br /> EXISTING GRADE <br /> • STANDARD CNI-208 <br /> OR EQUIVALENT VAULT BOX <br /> i <br /> LOCKING <br /> WELL CAP <br /> HOLI.OW STEM AUGER BOREHOLE <br /> CEMENT SEAL <br /> r 2-INCH BLANK PVC CASING, <br /> FLUSH THREADED SCHEDULE 40 <br /> BENTONITE PELLET SEAL <br /> NOTE:EXISTING RIVETS IN GNI VAULT BOX <br /> ARE TO BE REMOVED AND REPLACED WITH <br /> 3"X114"BOLTS EXTENDING OUTWARD INTO <br /> CONCRETE PAD FOR ADDITIONAL SUPPORT. <br /> 2-INCH SLOTTED PVC CASING, <br /> FLUSH THREADED SCHEDULE 40 <br /> CLEAN IMPORTED!iAND <br /> PVC BOTTOM CAP <br /> E CTI N NOT TO SCALE <br /> Figure 4. 'Typical Monitoring Well Construction <br />