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i <br /> traffic rated, water-tight, flush- <br /> mounted well cover <br /> 00 • \ <br /> -,,,—locking watertight top cap <br /> ground surface \ \ <br /> J <br /> r r r J r r <br /> J • r J r <br /> r\r \r r♦r 1r\ <br /> r J <br /> r F r <br /> \J r\• <br /> ! J <br /> \r r\• <br /> \J r\J <br /> \r J\J <br /> r r r <br /> \r •f <br /> cement sanitary seal flush threaded sch 40 PVC <br /> \r r\ <br /> wellscreen and blank casing <br /> \r r\r <br /> 0 5-2 feet bentonite pellets <br /> washed sand filter pack, 1 to 2 <br /> feet above top of screen ==_ <br /> == machine slotted wellscreen <br /> typical 3 inch annulus <br /> -- flush threaded PVC bottom cap <br /> TYPICAL <br /> VAPOR EXTRACTION WELL <br /> CONSTRUCTION IN CROSS SECTION <br /> Aqua Science Engineers Figure 11 <br />