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� l <br /> GROUND SURFACE <br /> PROTECTIVE COVER AT GRADE � <br /> 4 <br /> L HOLLOW STEM AUGER BOREHOLE(8-12 INCH) <br /> CEMENT SEAL <br /> 4-INCH BLANK PVC CASING--FLUSH THREADED SCHEDULE 40 <br /> BENTONfTE PELLET SEAL <br /> 2-FOOT <br /> 4-INCH SLOTTED PVC CASING-FLUSH I <br /> _ THREADED SCHEDULE 40 <br /> CLEAN IMPORTED SAND <br /> PVC BOTTOM PLUG <br /> NOT TO SCALE <br /> Figure 4. Typical Monitoring Well <br /> L � <br /> I <br />