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"` - Y j o- t`+•`�� _ -1 -- � ;-� 9" ���-''.-� +naffs. <br /> r <br /> ATTACW-1ENT 1 <br /> SOILS SAMPLING Ate" ANALYSES PROCEDURE <br /> Two-inch diameter by six-inch long brass tubes in a splic-barrel sampler <br /> are used for all soils sampling. Soils descriptions and field analyses <br /> are conducted using the middle tube from the sampler. If there is no <br /> indication of contamination, the soils from the deepest tube are trans- <br /> ferred to a plastic snap cap jar and stored as a record of the soils <br /> present at the site. Uniess otherwise requested, soils samples are dis- <br /> carded after 60 days. <br /> IT uses a combustible gas detector to determine in the field 'if the <br /> soils are contaminated. A Gastech, Inc., Madel GX-3A, calibrated using <br /> toluene, is the instrument used in this test. Soil samples from the <br /> middle brass tube are placed in a glass jar and shaken to loosen the <br /> soil. The cap on the jar is fitted with two tubes to allow air to pass. <br /> through the soil and intp the GX-3A meter. Any sample that exceeds 10 <br /> percent of the lower explosive limit (LEL) is sent to the laboratory for <br /> analyses by EPA Method 8024. If it is determined that a sample is to be <br /> sent to the laboratory, the undisturbed deepest brass tube is sealed and <br /> shipped in a glass jar sealed with a teflon lid under refrigeration to <br /> minimize the lc-.s of volatiles. <br /> Chain-of-custody farms and labels are used throughout the program to <br /> assure that proper sample handling and tracking is maintained. <br /> i <br /> w <br /> j <br />