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Storing and Sampling of Soil Stockpiles <br />Excavated material is stockpiled on and covered with plastic sheeting. Stockpile samples are collected <br />and analyzed for disposal classification on the basis of one composite sample per 100 cubic yards of <br />soil. Stockpile samples are composed of four discrete soil samples, each collected from an arbitrary <br />location on the stockpile. The four discrete samples are then composited in the laboratory prior to <br />analysis. Each discrete stockpile sample is collected by removing the upper 12 to 18 inches of soil, and <br />them 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, and <br />placed in a cooler with blue ice for preservation. A chain -of -custody form is initiated in the field and <br />accompanies the selected soil samples to the analytical laboratory. Stockpiled soils are covered with <br />plastic sheeting after completion of sampling. <br />