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TABLE 8: <br /> Mass Estimates Soil Remaining - UST B <br /> Spreckels Sugar <br /> 20500 Holly Drive <br /> Tracy, California <br /> Benzene <br /> Excavation Volume in soil Average Concentration Mass in Soil <br /> Area Cubic Yards mg/Kg Pounds <br /> Northwest Wall 8.5 5.8 0.13 <br /> Northwest Map 12 0.58 0.02 <br /> Northeast Projection 7.5 1.1 0.02 <br /> as Projection 7.5 4.5 0.09 <br /> Southeast Wall 0 0 0.00 <br /> Southwest Projection Z. 0.64 0.01 <br /> West Projection 10 1.1 0.03 <br /> Total Pounds 0.17 <br /> Gasoline <br /> Excavation Volume Remaining Average Concentration Mass in Soil <br /> Area Cubic Yards mg/Kg Pounds <br /> Northwest Wall 8.5 5000 114.8 " P� <br /> Northwest Map 12 500 16.2 <br /> Northeast Wall 7.5 210 4.3 <br /> East Projection 7.5 620 12.6 <br /> Southeast Wall 0 0 0.0 <br /> Southwest Projection I 7.5100 2.0 <br /> West Projection 10 680 18.4 <br /> Total Pounds 168.2 <br /> 1.Volume assumes a five foot impacted zone <br /> 2. Map is an interpolated plume <br /> 3. Projection assume a small stringer of contamination remaining of an estimated 7.5 <br /> to 10cubic yards <br /> 132 ILs <br /> G:\GROUNDZE\SPRECKELS\Risk\soil Dsp Mass Est.xls <br />