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l N. KLE'INFELDER & ASSOC VES • <br /> �v Soil borings will be advanced using a truck-mounted drill rig equipped <br /> with 6- or 8- inch hollow stem augers. Drill cuttings from borings will <br /> be placed in 55-gallon drums or plastic sheets and stockpiled on site. <br /> Final disposition of the cuttings is the sole responsibility of the <br /> client. During drilling an experienced geologist will classify the soils, <br /> log the boring, and collect soil samples. <br /> Soil samples will be collected by advancing the boring to a point <br /> 4 immediately above the sampling depth and then driving a Modified <br /> California Sampler lined with three brass tubes into the undisturbed <br /> soil. The sampler will then be removed from the bottom of the boring and <br /> i the bottom (third) tube sealed with aluminum foil and tight-fitting <br /> plastic caps. The sealed tube will be immediately stored in an iced <br /> cooler. If both formaldehyde and other analyses are required, the second <br /> sample will also be sealed and placed on ice. In either case, one <br /> remaining soil sample will also be sealed and retained under <br /> chain-of-custody in secured, refrigerated storage for future reference or <br /> analysis. Soil samples for chemical analysis will be submitted under <br /> }} chain-of-custody to a state/EPA certified analytical laboratory. <br /> I <br /> To minimize cross contamination, all augers and associated equipment will <br /> be steam-cleaned prior to drilling of each borehole. The sampling- <br /> equipment will be cleaned with a trisodium phosphate wash and a distilled <br /> water rinse prior to the collection of each soil sample. <br /> 3.4 WATER SAMPLING <br /> The north storm pond will be sampled using a tube sampler. One lower <br /> level and one near surface water sample will be taken. For metals <br /> analysis, the sample will be filtered on site and placed in an acidified <br /> plastic bottle prepared by the laboratory. <br /> The onsite water well will be purged with a pump prior to sampling. To <br /> determine if the aquifer has equilibrated, field parameters of pH, <br /> j conductivity, and temperature will be monitored and allowed to stabilize <br /> prior to sampling. Well water will be containerized onsite pending <br /> laboratory results . Final disposition of water will be handled by AM&M. <br /> 46-87-282 5 <br />