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r■� �r rr rr ■� r� r r r� rr r r r r� �r� r <br /> Table 7: Contaminant Mass Estimate Calculations (MtBE) <br /> Valley Whol2sale,Drug Company <br /> 1401 W.Freemont <br /> Stockton,California <br /> Project No.989.2 <br /> matrix area volume* Pounds Kilograms cont. load cont cont. <br /> Layer zone type depth -ft zone thickness ft2 ft3 of soil of soil mglkg mg Kg <br /> 1 Core silty clay 5 to 25 Vadose 20 4,500 90,000 8,550,000 3,878,280 0.014 5.43E+04 0.054 <br /> 2 Ring silty clay 5 to 25 20 32,000 640,000 60,800,000 27,578,880 0.006 1.65E+05 0.165 <br /> matrix area volume vol of H2O vol H2O cant. load cont. load cont. <br /> zone type depth -ft zone thickness ft2 ft3 ft3 liters mg/L kg!L kg <br /> 1 Core water 7 to 22 water table 15 250 3,750 1,313 37,166 0.100 1.00E-07 0.004 <br /> 2 Ring water 7 to 22 15 3,000 45,000 18,900 535,188 0.050 5.00E-08 0.027 <br /> Total Contaminant Kg= 0.250 <br /> lbs= 0.552 <br /> gals= 0.089 <br /> Soil Assumptions: <br /> Used the area of an elipse that encompassd Surfer generated contours to over compensate for area of impacted soil <br /> Used highest concentration of MtBE in each zone to maximized mass estimate <br /> Used a 20-foot thick zone of impacted soil to maximize mass estimate <br /> Groundwater Assumptions: <br /> Used the area of a circle that encompassed Surfer generated contours for conservative calculations <br /> Used the entire screen interval for thickness of contamination for conservative calculations <br /> Used the highest concentrations generated by Surfer for conservative calculations <br /> GeokgkalTeckRirslxc uh/oi <br />