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6.6 DECONTAMINATION PROCEDURES/CONTAMINANT OF MATERIALS <br /> To maintain quality control during drilling and sampling operations, prior to each sampling <br /> interval, the sampling equipment was decontaminated in an Alconox scrub solution and double- <br /> rinsed; first in tap water followed by a final rinse using distilled water. In addition, the hollow <br /> stem auger sections were decontaminated with pressurized hot water prior to drilling each boring to <br /> prevent cross-contamination from one boring to the next. Pending analytical results, waste <br /> generated during the cleaning process was stored in labeled, steel 55-gallon drums on the property <br /> awaiting appropriate disposal and manifesting. In addition, soils generated during drilling were <br /> stored in labeled, steel 55-gallon drums on the property pending analytical results and awaiting <br /> appropriate disposal and manifesting. <br /> JN 40007-088-0I <br /> 4msw\97-06ju\arcotrac.doc <br /> 6-4 <br />