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Standard Operating Procedures <br /> COLLECTING ORGANIC VAPOR DATA FROM SOIL SAMPLES <br /> Soil samples from drill cuttings, soil piles or tank excavations are placed with minimal <br /> disturbance into pre-cleaned standard soil sample collection jars. The jars are filled to <br /> approximately one half full. The soil samples are broken up to provided sufficient surface <br /> area to allow for volatilization. Aluminum foil is placed over the mouth of the jar. The jar- <br /> mouth is then capped with the lid. <br /> The jars are then placed out of direct sunlight and allowed to sit undisturbed for a minimum <br /> of twenty minutes; allowing time for the air in the headspace and soil to equilibrate. <br /> An organic vapor analyzer(OVA) or photoionization detector (PID) is to be calibrated and <br /> the batteries checked prior to each use. After the headspace within the sample jar and soil <br /> vapor has equilibrated, the probe of the organic vapor analyzer-or photoionization detector <br /> should be inserted into the jar, puncturing the aluminum foil. The presence of any organic <br /> vapor detected should be measured and recorded in parts per million (ppm). <br /> The samples used for collecting organic vapor data are never submitted for analytical <br /> testing. <br />