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• 0 <br /> . Preservation of Soil Samples <br /> After field screening, the sample sleeve ends will be sealed with <br /> aluminum foil and further protected with plastic caps. The samples <br /> will be labeled with ID#, location, depth, date, time, sampler' s <br /> initials, and analyses to be performed; then placed in an ice chest <br /> at 4 degrees C and delivered with accompanying chain of custody <br /> documentation to a California State certified analytical <br /> laboratory. <br /> Selection and Certified Laboratory Analyses of Soil Samples <br /> A determination of which soil samples, from each soil boring to be <br /> selected for certified laboratory analysis, will be made based on <br /> the results of field screening. A minimum of one sample, per <br /> borehole from 15 feet will be analyzed. The selected soil samples <br /> and the water samples will be analyzed by a certified laboratory <br /> for concentrations of Total Petroleum Hydrocarbons as Gasoline <br /> (TPHg) using EPA method 8015 modified, 5030 extraction, and <br /> Benzene, Toluene, Ethylbenzene, and Xylenes (BTEX) using EPA method <br /> 8020. <br /> Destruction of Confirmation Soil Borings <br /> The soil borings will be destroyed the same day they are drilled. <br /> The borings will be backfilled from total depth to within two feet <br /> • of the surface with neat cement and <5a bentonite. The surface <br /> portion of the holes will be plugged with quick setting concrete, <br /> then leveled to grade. <br /> DISPOSAL OF CUTTINGS AND WASTE WATER <br /> The auguring of the three soil borings will generate approximately <br /> a quarter of a yard of soil cuttings. This soil will be <br /> temporarily stored on-site with a base and covering of 6 mil <br /> visqueen. A composite soil sample will be collected from the soil <br /> pile and analyzed for concentrations of TPHg and BTEX. With <br /> receipt of soil results, the San Joaquin Valley Air Quality Control <br /> Board will be contacted for permission to aerate the soil. After <br /> the soil has been aerated, it should be retested at which point a <br /> determination of its final deposition will be made. <br /> The waste water generated from the cleaning of augers and sampling <br /> equipment during the drilling operations will be containerized in <br /> 55 gallon DOT drums. <br /> • 3 <br />