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3' <br /> ' 4"THK.CONCRETE <br /> SIDEWALK SECTION <br /> STANDARD GNI-208 <br /> OR EQUIVALENT VAULT BOX <br /> PLAN <br /> 4"THK.CONCRETE PAD <br /> EXISTING GRADE <br /> r •{f <br /> STANDARD CNI-208 <br /> E OR EQUIVALENT VAULT BOX <br /> LOCKING <br /> WELL CAP. <br /> HOLLOW STEM AUGER BOREHOLE <br /> CEMENT SEAL <br /> 2-INCH BLANK PVC CASING, <br /> FLUSH THREADED SCHEDULE 40 <br /> /r <br /> BENTONITE PELLET SEAL <br /> f <br /> NOTE: EXISTING RIVETS IN CNI VAULT BOX <br /> ARE TO BE REMOVED AND REPLACED WITH <br /> 3"X1/4"BOLTS EXTENDING OUTWARD INTO <br /> CONCRETE PAD FOR'ADDITIONAL SUPPORT. <br />�I <br /> 2-INCH SLOTTED PVC CASING, <br /> FLUSH THREADED SCHEDULE 40 <br /> CLEAN IMPORTED SAND <br /> PC O <br /> V BOTTOM CAP <br /> SECTION NOT TO SCALE <br /> Figure A-1. Typical g z l Monitorin Well Construction <br />