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traffic rated, water-tight, flush- <br /> mounted well cover <br /> T f <br /> 00 <br /> locking watertight top cap <br /> ground surface <br /> \ Y Y \ Y <br /> Y \ \ \ Y <br /> ! l I <br /> \ Y <br /> I f f <br /> Y \ <br /> f ! J f <br /> Y \ <br /> l f f J <br /> ♦ Y <br /> \ ♦ <br /> Y Y <br /> J J f f <br /> cement sanitary seal r`r <br /> flush threaded sch. 40 or 80 PVC <br /> r / f <br /> wellscreen and blank casing <br /> \ Y <br /> J l r r <br /> \ Y <br /> 1-2 feet bentonite pellets <br /> washed sand filter pack, 1 to 2 <br /> feet above top of screen =-- <br /> == machine slotted wellscreen <br /> 5 feet above saturated zone <br /> and 10-15 feet below saturated <br /> zone <br /> typical 2-3 inch annulus =-= <br /> --- flush threaded PVC bottom cap <br /> TYPICAL <br /> MONITORING WELL CONSTRUCTION <br /> IN CROSS SECTION <br /> Aqua Science Engineers Figure 4 <br />