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18 <br /> locking cover <br /> Pump base <br /> land surface <br /> 8-inch diameter steel casing <br /> cement grout seal <br /> 6-inch diameter <br /> Schedule 80 PVC casing <br /> top of perforations <br /> (x+20') <br /> 12-inch diameter hole <br /> perforated casing <br /> gravel pack <br /> total depth Clay <br /> (-651) <br /> FIGURE 3 - SCHEMATIC DIAGRAM OF NEW MONITOR WELL <br />