Laserfiche WebLink
•12/05/2005 17:11 FAX 209 9A8 621 012 <br /> k'9 K!.EINFELDER <br /> 8-2.8 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 siL•e owner. if requested, Kleinfelder can coordinate disposal <br /> of soil and water after analytical results are available. <br /> B-3 GROUNDWATER WELL INSTALLATION <br /> B-3.1 Monitoring Well Construction <br /> Construction details for shallow groundwater monitoring wells are as follows: <br /> The well casing are 2- or 4-inch inside diameter, flush threaded joint; schedule 4C PVC <br /> pipe. <br /> • The wells are constructed in 8-or 10-inch diameter borings. <br /> • Well screen,sections are perforated with 0.010- or 0.020-inch factory-cut slots. <br /> • The wells are generally screened frons 5 feet above to 15 feet below first groundwater. <br /> 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 /> feet into the aquitard. Effort is made not to screen across two aquifers. If confined <br /> aquifer conditions or high vadose zone contamination arc encountered, the well screen is <br /> usually not set above the depth of first encountered groundwater. Wells arc usually not <br /> set in areas of suspected significant soil contamination. <br /> • The PVC pipe 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 perfoneted sections: <br /> Based 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 tremuxied, using clean <br /> water. <br /> 02001 PROP.EhV)sT03P443 net=ber 5.2003 <br /> ®2003 KleinfrWer,Inc. Pa;e iv affix <br />