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Fj <br /> F Appendi .A <br /> Drilling and Sampling Procedures <br /> ' The procedures that will be used for drilling the borings <br /> and collecting soil samples are presented <br /> below. <br /> i <br /> F <br /> r <br /> Drilling Procedures <br /> F U to six soil borings will be advan ed <br /> • p g and sampled using hollow stem auger <br /> (HSA) drilling equipment. <br /> F • Augers and drilling equipment will b washed with a hot water pressure washer <br /> Fprior to drilling each boring. <br /> Sampling Procedures <br /> • The sampling equipment will be w hed in a detergent rinse, two clear water <br /> rinses, and a final deionized/distilled water rinserior <br /> p to drilling. The equipment <br /> will dry air dried or dried using paper towels. <br /> • The borings will be advanced to approximately 3 meters (10 feet) BGS. Discreet <br /> soil samples will be collected at 1.5-meters; (5-feet) and at 3 meters (10 feet) BGS. <br /> Soil samples will be collected using asplit-spoon sampler lined with metal sample <br /> tubes. <br /> • Soil samples will be collected in six-inch long brass sample tubes inserted inside <br /> f the samplers. The sample tubes wil be either pre-washed by the supplier or <br /> washed using a bristle brush with a d tergent rinse followed by two clear water <br /> rinses and final deionized/distilled w ter rinse. The sample tubes will be dry. <br /> before use. <br /> • Samplers will be driven using a 140-pound hammer dropping approximately ; <br /> 30 inches. <br /> • Following retrieval of the sampler, the first (lowest) sample tube will be removed <br /> F, from the sampler, the ends covere with TeflonTM film, and capped with <br /> polyvinyl chloride (PVC) end caps. <br /> F; Soil in the next sample tube (where available) will be used to describe the <br /> lithology and measure volatile or anic compound (VOC) concentrations. <br /> Approximately half of the sample from the sample tube will be removed and <br /> a <br /> placed in a resealable plastic bag. The plastic bag will be set aside to allow I <br /> VOCs, if present, to accumulate in the headspace above the sampled soil. The <br /> headspace will then be sampled using a portable photo-ionization detector (PID). <br /> The PID probes will be inserted through a hole made in the plastic bag and the <br /> highest measurement encountered recorded on the boring log. <br /> -115ACRFPf ICOMMOMsacDPLVp21PRJIPJ81831835444.2a6.doc i <br /> A-1 f <br />