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rims- <br /> '1_ <br /> � .:fix r, <br /> - , a. .... <br /> �-' . � max., � _ L � <br /> I <br /> I`$ <br /> liner(s) are scaled with aluminum foil c:.7 teflon tape, capped with plastic <br /> I caps, labeled, logged on chain-of-custody forms and stored ip a chilled, ice <br /> chest for preservation in the field and during transport to the analytical <br /> laboratory. All labels are pre-written with indelible ink to minimize handling <br /> time. <br /> i 5) Samples are checked for the presence of contamination in the 5%id by the <br /> geologist. Any discoloral.tion or odor is noted on the boring log. Each <br /> sample is classified 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 sniffer. In either case, the instrument probe is ,held <br /> adjacent to freshly crumbled soil and the stabilized reading value is recorded <br /> � on the log. Other visual screening techniques include examination of the <br /> f sample under hand4ens magnification as-well-as floating sheen inspection <br /> resulting from immersion in water. <br /> " 6) 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 Exceltech personnel, pick-up by laboratory personnel, or <br /> transfer by a personal delivery service. Each transfer of responsibility is <br /> recorded on a chain-of-custody log that accompanies the sample. <br /> - t <br /> II. SOIL SAMPLING BY HAND <br /> 1) Some situations require that samples be collected by hand without the <br /> N assistance of a drill ng (e.g., sail stock piles, excavation sidewall sampling, <br /> etc.). When possible, soil sample; will be collected using a steel core samplex <br /> h equipped with clean brass li::ers which is advanced into the soil with a slide <br /> l" hammer. In other cases, the outer surface of the soil is removed and a brass <br /> liner is driven into the soil by hand or with a hammer. To avoid damaging <br /> the liner,a block of wood is h,.id next to the liner so that the hammer strikes <br /> the block rather than the liner. The liner is removed and handled as <br /> described above. In deep excavations where safety factors preclude the direct <br /> sampling of the bottom or side wall, soil is retrieved by a backhoe bucket and <br /> :a this soil is sampled. <br /> EXCELTECH, INC. <br /> Soil Sampling Protocol <br /> Latest Revision: March 28, 1990 <br />