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Table 8: Contaminant Mass Estimate Calculations (TPH-G) <br /> Valley Wholesale-Druo Company <br /> 1401 W Freemont <br /> Stockton, California <br /> Project No 989 2 <br /> matrix area volume* cont. load cont cont. <br /> Layer zone type zone thickness ft2 ft3 mg/-N mg Kg <br /> I Core silty clay Vadose 10 45 450 300 58109562 6 <br /> 2 Ring 1 silty clay 10 548 5,480 188 44274606 08 44 <br /> 3 Ring 2 silty clay 10 6,957 66,714 38 1078068438 108 <br /> matrix area volume cont. load cont. load cont. <br /> zone type zone thickness ft2 ft3 mg[L kg/ L kQ___ <br /> 1 Core water water table 20 90 1,800 0200 2 000E-07 0 004 <br /> 2 Ring 1 water 20 1,096 21,920 0 100 00000001 0 026 <br /> 3 Ring 2 water 20 13,914 278,280 0 050 000000005 0 165 <br /> Total Contaminant Kg= 158 <br /> lbs= 349 <br /> gals= 56.2 <br /> Notes <br /> Volume of estimated contaminant zone less the volume of excavated soil (2,850 ft3) <br /> Groundwater plume assumed to be twice the area and thickness of the soil plume, maxium concentrations used <br /> h <br />