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Table 6: Contaminant Mass Estimate Calculations (TPH-G) <br /> Vallay 1Nholesale Drug Company <br /> 1401 W. Freemont <br /> Stockton, California <br /> Project No.969.2 <br /> matrix area volume* cont. load cont cont. <br /> Layer zone type zone thickness ft2 ft3 mglkg mg Kg <br /> 1 Core silty clay Vadose 10 45 450 400 7747941.6 8 <br /> 2 Ring 1 silty clay 10 548 5,480 250 59032808.1 59 <br /> 3 Ring 2 silty clay 10 6,957 66,714 50 143742458.4 144 <br /> matrix area volume cont. load cont. load cont. <br /> zone type zone thickness ft2 ft3 mglL kg/ L kg <br /> 1 Core water water table 20 90 1,800 0.2 1.800E-07 0 <br /> 2 Ring 1 water 20 1,096 21,920 0.1 0.0000001 0 <br /> 3 Ring 2 water 20 13,914 278,280 0.5 0.0000005 2 <br /> Total Contaminant Kg= 212 <br /> lbs= 468 <br /> gals= 75 <br /> Noe <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 />