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k4 KLEINFELDER <br /> B-2.8 Soil Boring Closure and Cutting Disposal <br /> Soil borings are closed immediately after the collection and logging of soil samples. Closure is <br /> accomplished by grouting the boring with a cement bentonite slurry or as otherwise required. <br /> Drill cuttings will be placed in 55-gallon drums wrapped in plastic or spread around the boring <br /> and left on site for disposal by the site owner. If requested, Kleinfelder can coordinate disposal <br /> of soil and water after analytical results are available. <br /> r B-3 GROUNDWATER WELL INSTALLATION <br /> L� B-3.1 Monitoring Well Construction <br /> Constriction details for shallowg <br /> roundwater monitoring wells are as follows: <br /> g <br /> • The well casing are 2- or 4-inch inside diameter, flush threaded joint, schedule 40 PVC <br /> r pipe. <br /> Ire <br /> • The wells are constructed in 8- or 10-inch diameter borings. <br /> 0 Well screen sections are perforated with 0.010- or 0.020-inch factory-cut slots. <br /> r0 The wells are generally screened from 5 feet above to 15 feet below first groundwater. <br /> L, The screen length is reduced if an aquitard with a .minimum thickness of 5 feet is <br /> encountered. If an apparent aquitard is encountered, the well is usually terminated 1 to 2 <br /> L. feet into the aquitard. Effort is made not to screen across two aquifers. If confined <br /> aquifer conditions or high vadose zone contamination are encountered; the well screen is <br /> . usually not set above the depth of first encountered groundwater. Wells are usually not <br /> set in areas of suspected significant soil contamination. <br /> • The PVCPiP P e and end caps are steam cleaned prior to installation. <br /> • The annular space between the screen and the wall of the boring is backfilled with the <br /> appropriate clean sand to approximately 2 feet above the top of the perforated sections. <br /> LBased on soil logs or a sieve test, modifications may be made regarding the size of sand <br /> to be used. Installation of the sand may require that the sand be tremmied, using clean <br /> water. <br /> L <br /> 34202.E01 /ST03RI 130 Page 4 of 9 <br /> Copyright 2003,Kleinfelder,Inc. August 8,2003 <br />