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. TPHG - Water <br /> Affected Area of aquifer affected by plume - 1 008 M3 <br /> Total concentration (Apr , 1999 data) = 8,740 ug/I, or 0 00000874 kg/l <br /> Effective porosity = 40% (sandy aquifer, high end estimate), 40% saturated, so <br /> 1 ,008 m3 x 0 4 = 403 2 m3 saturated aquifer thickness assumed <br /> 403 2 m3 x 1,000 I/ m3 = 403.200 I aquifer water <br /> 403,000 1 water x 8 740 x 10' kg/I = 3 52 kg TPHG dissolved <br /> or, 0.92 gallons TPHG estimated <br /> Benzene - Water <br /> Total concentration (Apr , 1999 data) = 0 988 ug/I, or 0 000000988 kg/l <br /> Effective porosity = 40% (sandy aquifer, high end estimate), 40% saturated, so <br /> 1,008 m3 x 0 4 = 403 2 m3 saturated aquifer thickness assumed <br /> 403 2 m3 x 1,000 1/ m3 = 403204 1 aquifer water <br /> 403,200 1 water x 0 988 x 10 B kg/l. = 0 398 kg Benzene dissolved <br /> or, 0 105 gallons Benzene estimated <br /> Notes Used total concentrations observed in 1996 and 1999 data for conservativeness <br /> All calculated values are rough estimates only, assumes ideal aquifer conditions <br /> mg/kg-milligrams per kilogram, ug/kg-micrograms per kilogram, kg/1-kilograms per liter, ug/1- <br /> micrograms per liter, I-liters, m-meters <br /> .' - No values for TPHG or Benzene readily available, used n-Octane value in mass calculation <br /> estimate (from Lyman and others, 1992) <br /> Reference Lyman, W J , Reidy, P J and Levy, B, 1992, Mobility and Degradation of Organic <br /> Contaminants in Subsurface Environments C K Smoley, Inc , Chelsea, Ml, Sections 6 and 8 <br /> Page 13 <br />