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' File No. 20-3978-01. 6 KLEINFELDER <br /> November 19, 1996 <br /> B-2.7 Decontamination of Equipment <br /> To reduce the potential for cross-contamination, augers and associated equipment are <br /> steam cleaned prior to drilling each boring. In addition, sampling equipment is cleaned <br /> with a trisodium phosphate or non-phosphate detergent wash and rinsed with distilled <br /> water prior to collecting each soil sample. <br /> B-2.8 Soil Boring Closure and Cutting Disposal <br /> Soil borings are closed immediately after the collection and logging of soil samples. <br /> Closure is accomplished by grouting the boring with a cement/bentonite slurry or as <br /> otherwise required. <br /> Drill cuttings will be placed in 55-gallon drums wrapped in plastic or spread around the <br /> boring and left on site for disposal by the site owner. If requested, Kleinfelder can <br /> coordinate disposal of soil and water after analytical results are available. <br /> 20-3978-01.WR61MP960138 Page B-d 01996, Kleinjelder, Inc. <br />