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' KLEINFELDER <br /> ' A-2.7 Decontamination of Equipment <br /> ' To reduce the potential for cross-contamination, augers and associated equipment are steam <br /> cleaned prior to drilling each boring. In addition, sampling equipment is cleaned with a <br /> trisodium phosphate or non-phosphate detergent wash and rinsed with distilled water prior to <br /> collecting each soil sample. <br /> t <br /> A-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 cementibentonite 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 /> ' A-3 GROUNDWATER WELL INSTALLATION <br /> A-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 40 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 /> t <br /> ' 20-4587-111.WP 1121111 P128 Page A-4 <br /> Copyright 2001, Klcinfelder, Inc. May 8,2001 <br />