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k" KLEINFELDER <br /> ' local guidelines. At the clients request, Kleinfelder can provide assistance in disposing the <br /> cuttings. <br /> ' 3.2 MONITORING WELL INSTALLATION <br /> ' 'A' ground water monitoring well will be constructed in each of the three soil borings. The <br /> ' locations of the proposed monitoring wells are shown on Plate 3. Actual well locations may <br /> be revised in the field. Proposed construction details of the monitoring wells are as <br /> follows: <br /> o The wells will be constructed in 10-inch diameter boreholes. <br /> o The well casing will be 4-inch inside diameter, flush-threaded joint, schedule <br /> 40 PVC pipe. <br /> ' o The screened section may be set 5 feet above and 15 feet below the depth <br /> ' where ground water is first encountered unless: <br /> 1. Semi-confined aquifer conditions are encountered. <br /> 2. An aquitard is encountered. <br /> 1 If either condition No. 1 or 2 are present, the screen section depth and length may be <br /> revised. <br /> ' Because we will be sampling for unknown chemical compounds for a baseline study of the <br /> ' ground water quality, we believe the water should be examined for floating product. To . <br /> permit this type of examination during seasonal fluctuations of the water level, the wells <br /> should be constructed with the well screens 5 feet above the depth of the first encountered <br /> ground water. <br /> ' o The PVC pipe will be steam-cleaned prior to installation. <br /> o Well screen sections perforated with .010- or 0.020-inch factory-cut slots will <br /> 1 be used; selection of the size of the perforations will be based on the field <br /> geologist's interpretation of the lithology of the aquifer,using the USCS. <br /> ' o The annular space between the pipe and the wall of the boring will be <br /> ' backfilled with either number 0/30 or 2/12 clean Lone Star Industries <br /> 129-88-1378 4 <br />