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n <br /> traffic rated, water-tight, flush- <br /> mounted well cover <br /> r <br /> locking watertight top cap <br /> ground surface <br /> r r r <br /> r•r •r r♦r ♦r♦ <br /> r•r *r r♦r •r• <br /> r r r r r r <br /> r r <br /> •r ♦r <br /> • <br /> • • r <br /> �r r•r <br /> ♦r r~r <br /> • <br /> r r r <br /> `r r•r <br /> `r •r <br /> r r r <br /> �r :•r <br /> ♦r r~r <br /> cement sanitary seal <br /> ,r r,• flush threaded sch 40 PVC <br /> wellscreen and blank casing <br /> r r r <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 3 inch annulus <br /> -- flush threaded PVC bottom cap <br /> TYPICAL <br /> MONITORING WELL CONSTRUCTION <br /> IN CROSS SECTION <br /> Aqua Science Engineers L <br /> gure 5 <br />