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liner(s) are sealed with aluminum foil or teflon , ca tape, <br /> caps, labeled, logged on chain-o€-custod p ppm with plastic <br /> y forms and stored in a chilled ice <br /> chest for preservation in the field and during transport to the analytical <br /> laboratory. All labels are pre-wrirten with indelible ink to minimize handling <br /> time. <br /> 5) Samples are checked for the presence of contamination in the field by the <br /> Vologist. Any discoloration or odor is noted on the boring log. Each <br /> sample is clas_ified in the field by a geologist using the Unified Soil <br /> Classification System and a Munsell soil color chart. In addition, samples may <br /> also be field-screened with a photo ionization detector (calibrated daily) or <br /> threshold limit value snifior. In either case, t;e instrument ent probe is held <br /> adjacent to freshly crumbled soil and the stabilized reading value is ►ecorded <br /> f on the log. Other visual screening techniques include examination of the <br /> sample under hand-lens. magnification as-well-as fluadng sheen ;ns,nertion <br /> resulting from immersion in water. <br /> 61 Samples are held in the possession of Exceltech personnel until transferred to <br /> the analytical laboratory. Transfer to the laboratory is accomplished with <br /> either delivery by ExceItech personnel, <br /> pick-up by laboratory personnel, or <br /> transfer by a personal delivery service. Each transfer of responsibility is <br /> ,,. <br /> recorded on a 4hain-of-custody log that accompanies the sample. <br /> .r <br /> 1[I. SOIL SAMPLING BY HAND <br /> 1) Some situations require: that samples be collected by hand without the <br /> assistance of a drill rig (e.g., soil stock piles, excavation sidewall sampling, <br /> etc.). W ten possible, soil samples will be collected using a steel core sampler <br /> `F f equipped with clean brass liters which is advanced into the soil with a slide <br /> hammer.. It other cases, the outer surface of the soil is removed and a brass <br /> r litter is driven into the soil by hand or with a hammer. To avoid damaging <br /> the Liner, a block of wood is held i:ext to the liner so that the Nimmer strikes <br /> tn� block rather than the liner. - Th" liner is-removed and.-handled as <br /> scribsd <br /> eabove, In; deep excavations where safety factors preclude the direct <br /> sampling of the bottom or side wall, <br /> soil-is reerie aed by a backhoe but <br /> this sail is sampled. ket and <br /> A - <br /> r, { EXCELTECH, INC. <br /> ff, Soil Sampling Protocol <br /> Latest March 28, 1991; - - <br /> t <br /> mi <br /> Run =1WJR&M <br /> F r� <br /> �a <br />