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G-R Field Methods and Procedures <br /> analyical laboratory A chain-of-custody form is initiated in the field and accompanies the <br /> groundwater samples to the analytical laboratory <br /> Storing and Sampling of Soil Stockpile <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 <br /> 100 cubic yards of soil Stockpile samples are composed of four discrete soil samples, each <br /> collected from an arbitrary location on the stockpile The four discrete samples are then <br /> composited in the laboratory prior to analysis <br /> Each discrete stockpile sample is collected by removing the upper 12 to 18 inches of soil, and <br /> then driving the stainless steel or brass sample tube into the stockpiled material with a mallet <br /> or drive sampler The sample tubes are then covered on both ends with teflon sheeting, <br /> capped, labeled, and placed in a cooler with blue ice for preservation A chain-of-custody <br /> form is initiated in the field and accompanies the selected soil samples to the analytical <br /> laboratory Stockpiled soils are covered with plastic sheeting after completion of sampling <br /> A-2 <br />