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F <br /> i <br /> Native soil will be collected from the base and walls of the excavation with the excavator <br /> bucket. The soil will be brought to the surface and the outer soil will be scraped away. A <br /> clean, 6-inch long, 2-inch diameter clean brass tube wit; be driven into the soil. The brass <br /> — tube will be removed and the ends covered witty aiuminum foil and plastic end caps. The <br /> ' ends will then be wrapped with duct tape. The tube will be labeled and immediately placed <br /> << i� on ice for transport to the laboratory. Chain-of-Custody will be maintained through delivery <br /> i t to the laboratory. <br /> Soil samples will also be collected for laboratory analysis from the soil stockpiles to evaluate <br /> treatment and disposal options, four soil samples will be collected for every 50 cubic yard-71 <br /> 1 <br /> f <br /> 3 i of stockpiled soil. Each group of four samples will be composited into one sample by the <br /> c laboratory. Soil samples will be collected in clean brass tubes from approximately 6-inches f <br /> below the surface of the stockpiles. Each sample will be prepared for shipment to the <br /> laboratory using the same procedures described above, t <br /> rte; <br /> 6.3 Laboratory Analyses <br /> t <br /> 3 - <br /> ' µ Soil samples collected from the limits of the excavation and composite samples will be <br /> analyzed by a stare-certified laboratory for total petroleum hydrocarbons(TPH)as gasoline <br /> and benzene,toluene,ethylbenzene,and xylenes(BTEX). The laboratory will use Modified <br /> f <br /> U.S.Environmental Protection Agency(EPA)Method 8015 to analyze for TPH as gasoline <br /> and EPA Method 8020 to analyze for BTEX. <br /> z <br /> 8 Doc #.tR06767;V 1.I <br />