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w <br /> 6 `dry. <br /> --5"THK-CONCRETE <br /> �.� PAD <br /> ,2" <br /> STANDARD CIJI or,EQulvnl.ErJr vnuLr aax <br /> }-16" <br /> PLAN <br /> 6-THK.CONCRETE PAD <br /> EXISTING GRADE <br /> STANDARD CNI OR EQUIVALENT VAULT BOX <br /> LOCKING <br /> WELL CAP <br /> HOLLOW STEM AUGER 13OREHOLE <br /> CEMENTSEAL <br /> 6-INCH BLANK PVC CASING, <br /> FLUSH THREADED SCHEDULE 40 <br /> I BENTONITE PELLET SEAL <br /> 6-INCH SLOT1 ❑PVC CASING. <br /> FLUSH THREADED SCHEDULE 40. <br /> SLOTTED CASING WILL EXTEND FROM <br /> ROUNDWATER <br /> 5-FEET ABOVE G <br /> 20-FEET BELOW GROUNDWATERO <br /> CLEAN IMPORTED SAND <br /> -INCH-DIAMETER 5 FT SECTION OF 6 <br /> PV�CASING,FLUSH THREADEDSCHEDULE BLANK0 <br /> - Pvc BOTTOM CAP-- -- <br /> NaT To SCALE <br /> SECTION <br /> Figure 4. Typical Extraction Welt Construct'On <br />