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April 26, 1988 <br /> Delta Truck Sales, Stockton, AGS Job No. <br /> California 2005-p <br /> four equal quadrants. one soil sample will be selectively taken <br /> from each quadrant of the cell. Soil samples from the four <br /> quadrants contained in each cell will be composited in the <br /> laboratory for chemical analysis, representing the average soil <br /> quality of that cell. Samples will also be collected at ten foot <br /> intervals from the sides of the pit; these samples will be <br /> combined into <br /> at least two composite samples for laboratory <br /> analyses. <br /> If the contaminated area is limited to a zone of 20 feet by 40 <br /> feet, four composite samples from the base and two composite <br /> P (consisting of approximately six individual samples) from I <br /> the sides of the excavation will be collected. <br /> If the base of � <br /> the excavation is significantly wider than 20 feet ' ll <br /> additional <br /> samples will be collected from the base of the <br /> densit pit• This sample I 'I <br /> y should provide sufficient data for the evaluation of <br /> contaminant concentrations. I, <br /> i <br /> i; <br /> pl I i <br /> Soil samples will be collected by driving laboratory-cleaned <br /> ' brass sample sleeves <br /> six inches in length and 2 . 5 <br /> inches in <br /> diameter, <br /> into native soil with a hand-operated percussion <br /> sampler. The sampling tool consists of an slide hammer attached <br /> to a stainless steel-driving <br /> shoe, which contains a brass sleeve. <br /> i <br /> 9 iI <br /> i <br />