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1 <br /> Table C-2 <br /> Summary of Mass Calculationsfor BTEX(pprn) <br /> Former Tank Site#1 <br /> 1515 West Weber Avenue,Stockton, CA <br />' Soil Boring Confirmation Sample <br /> Depth (ft-bgs) S1-B1 W4N10 <br />' 8 3883 25 063 <br /> 85 2905 360 <br /> 9 2035 253 <br /> 94 1416 177 <br /> 95 1273 159 <br /> 10 618 79 <br /> t 105 72 12 <br /> 1051 61 11 <br /> 1055 22 06 <br />' <br /> 1056 13 05 <br /> 1057 033 04 <br /> 106 000 00 <br /> 115 000 00 <br /> 14 000 00 <br /> 15 0149 00 <br /> Total BTEX Average Concentration= - 454lie — <br /> Average depth to remedial goal(1 0 ppm) = 204 <br /> BTEX MASS (lb) After Excavation <br /> Thickness(ft) = 2 04 <br /> Surface Area(ft) = 177 8 <br /> Volume(fe) = 362 <br /> Total Mass(lb) = 1 642 <br /> Note <br /> Bolded values are actual data points <br /> The thickness value is the depth below the depth of the first data point at a sample location For example, <br /> if a sample was taken at 5 feet and the thickness as 8 3 feet,the total depth below ground surface is 13 3 feet <br /> 2996Catellus Stockton\1999 Closure Report\report tables\Sate#1 Mass Calc <br />