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Appendix A <br /> Drilling and Sampling Procedures <br /> The procedures that will be used for drilling the borings and collecting soil samples are presented <br /> below. <br /> Drilling Procedures <br /> • Up to two soil borings will be advanced and sampled to first encountered <br /> groundwater(approximately 15 meters)using hollow stem auger(HSA) drilling <br /> equipment. <br /> • Augers and drilling equipment will be washed with a hot water pressure washer <br /> prior to drilling each boring. <br /> • Soil descriptions, sample type and depth, and related drilling information will be <br /> recorded on a boring log under the supervision of a State-registered geologist. <br /> Sampling Procedures <br /> • The sampling equipment will be washed in a detergent rinse, two clear water <br /> rinses, and a final deionized/distilled water rinse prior to drilling. The equipment <br /> will dry air dried or dried using paper towels. <br /> • Discreet soil samples will be collected at 1.6-meter(5-foot) intervals until <br /> groundwater is encountered. Soil samples will be collected using a split-spoon <br /> sampler lined with metal sample tubes. <br /> • Soil samples will be collected in six-finch long, stainless steel or brass sample <br /> tubes inserted inside the samplers. The sample tubes will be either pre-washed by <br /> the supplier or washed using a bristle brush with a detergent rinse followed by <br /> two clear water rinses and final deionized/distilled water rinse. The sample tubes <br /> will be dry before use. <br /> • Samplers will be driven using a 140-pound hammer dropping approximately <br /> 30 inches. The number of blows(blow count)required to advance the sampler <br /> 12 inches will be recorded on the boring log. <br /> • Following retrieval of the sampler, the first(lowest) sample tube will be removed <br /> from the sampler, the ends covered with TeflonTM film, and capped with <br /> polyvinyl chloride(PVC) end caps. <br /> • Soil in the next sample tube (where available)will be used to describe the <br /> lithology and measure volatile organic compound (VOC) concentrations. <br /> Approximately half of the sample from the sample tube will be removed and <br /> placed in a resealable plastic bag. The plastic bag will be set aside to allow <br /> S4GDP-N.ImncfpllProjectsV8318347601wkpin&hsplwp&hxp HSAM 110 EISA wp.doc A-1 <br /> 4119101 1 <br />