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G -R Field Methods and Procedures <br />recorded as reconnaissance data only. GR does not consider field screening techniques to be <br />verification of the presence or absence of hydrocarbons. <br />Storing and Sampling of Soil Stockpiles <br />Excavated material is stockpiled on and covered with plastic sheeting. Stockpile samples are <br />collected and analyzed for disposal classification on the basis of one composite sample per 100 cubic <br />yards of soil. Stockpile samples are composed of four discrete soil samples, each collected from <br />an arbitrary location on the stockpile. The four discrete samples are then composited in the <br />laboratory prior to analysis. <br />Each discrete stockpile sample is collected by removing the upper 12 to 18 inches of soil, and them <br />driving the stainless steel or brass sample tube into the stockpiled material with a mallet or drive <br />sampler. The sample tubes are then covered on both ends with teflon sheeting, capped, labeled, <br />and placed in a cooler with blue ice for preservation. A chain -of -custody form is initiated in the <br />field and accompanies the selected soil samples to the analytical laboratory. Stockpiled soils are <br />covered with plastic sheeting after completion of sampling. <br />A-2 <br />