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Appendix <br /> Drilling and Sampling Procedures <br /> f <br /> The procedures that were used for drilling the boring s and collecting soil samples are presented <br /> ' below. <br /> r <br /> Drilling Procedures <br /> • Six soil borings (B-1 through B-6) we advanced and sampled using hollow-stem <br /> auger drilling equipment. <br /> • Augers and drilling equipment were washed with a hot water pressure washer <br /> prior to drilling each boring. <br /> Sampling Procedures <br /> • The sampling equipment was washed n a detergent rinse, two clear water rinses, <br /> and a final deionized/distilled water r Me prior to drilling. The equipment was <br /> dry air dried or dried using paper towels. <br /> F <br /> • The borings were advanced to approximately 3 meters (10 feet) BGS. Discreet <br /> soil samples were collected at approximate depths of 1.5 meters (5 feet) and at <br /> 3 meters (10 feet) BGS. Soil samples were collected using a split-spoon sampler <br /> lined with metal sample tubes. <br /> • Soil samples were collected in six-inch long brass sample tubes inserted inside the <br /> ' samplers. The sample tubes were eit ier pre-washed by the supplier or washed <br /> using a bristle brush with a detergent r rise followed by two clear water rinses and <br /> final deionized/distilled water rinse. T e sample tubes were dry before use. <br /> • Samplers were driven using a 140 pound hammer dropping approximately <br /> 30 inches. <br /> Following retrieval of the sampler, the first (lowest) sample tube was removed <br /> from the sampler, the ends covered with TeflonTM film, and capped with <br /> polyvinyl chloride end caps. <br /> • Soil in the next sample tube (where a ailable) was used to describe the lithology <br /> j and measure volatile organic compound (VOC) concentrations. Approximately <br /> half of the sample from the sample toe was removed and placed in a resealable <br /> plastic bag. The plastic bag was set aside to allow VOCs, if present, to <br /> accumulate in the headspace above the sampled soil. The headspace was then <br /> sampled using a portable photo-ioniza ion detector (PID). The PID probes were <br /> inserted through a hole made in the plastic bag and the highest measurement <br /> -- encountered recorded on the boring log. <br /> 4 � <br /> N;4sacDP12003iPg183e35444.3ac.doc E-1 <br />