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GSI Field Methods and Procedures <br /> Updated February 13, 1995 <br /> Field Screening of Soil Samples <br /> A PID is used to perform head-space analysis in the field for the presence of organic vapors <br /> from the soil sample This test procedure involves removing soil from the tip of the <br /> sampling device or sample liner into a clean glass jar, and immediately covering thejar with <br /> aluminum foil secured under a ring-type threaded lid After approximately twenty minutes, <br /> the foil is pierced and the atmosphere within the far tested using a PID. Head-space <br /> screening results are recorded on the boring log. Head-space screening procedures are <br /> performed and results recorded as reconnaissance data GSI does not consider field <br /> screening techniques to be verification of the presence or absence of hydrocarbons <br /> Storing And Sampling of Drill Cuttings <br /> Drill cuttings are stockpiled on plastic sheeting or stored in drums depending on site <br /> conditions and regulatory requirements. Stockpile samples are collected and analyzed on <br /> the basis of one composite sample per SO cubic yards of soil Stockpile samples are <br />. composed of four discrete soil samples, each collected from an arbitrary location on the <br /> stockpile The four discrete samples are then composited in the laboratory prior to analysis. <br /> Each discrete stockpile sample is collected by removing the upper 3 to 6 inches of soil, and <br /> them driving the stainless steel or brass sample tube into the stockpiled material with a <br /> hand, mallet, or drive sampler. The sample tubes are then covered on both ends with teflon <br /> sheeting or aluminum foil, capped, labeled, and placed in a cooler with blue ice for <br /> preservation A chain-of-custody form is initiated in the field and accompanies the selected <br /> soil samples to the analytical laboratory Stockpiled soils are covered with plastic sheeting <br /> after completion of sampling <br /> A-2 <br />