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1 <br />' FORMULAS AND METHODS <br /> 1 Area of lateral extent of impacted soil determined by AutoCAD from Figure 4 - Lateral Extent of <br /> Impacted Soil <br />' Average thickness of sections estimated from cross sections <br /> Average concentrations estimated from soil data and cross sections <br /> Calculated volumes and masses rounded for presentation on tables Calculations performed to a <br />' minimum of two decimal places <br /> Density determined from average specific gravity and porosity of samples as determined by <br /> laboratory analyses <br />' 1Y d3 = 27 ft' <br />' 1 yd = 764554 86 cm3 <br /> x density of 1 63 grams/cm3 <br />' = 1 2462244 x 106 grams <br /> 1 kg = 2 2046 lbs <br /> 1 1 gallon gasoline = 6 17 lbs <br /> 1 <br /> 1 <br /> I <br /> I <br /> I <br />