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GR Field Methods and Procedures <br /> Storing and Sampline 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. <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, 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 /> A-2 <br />