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• <br /> 2113196 <br /> Estimated Volume of Impacted GW 1400 sq ft x 8 ft = 11,200 cu ft <br /> Estimated Average Concentration 55 ppb <br /> Estimated Soil Porosity 35% <br /> Ground Water Mass Volume x Density x Porosity <br /> Ground Water Mass = (11,200 cu ft )x (100 lbs Icu ft ) x ( 35) = 392,000 lbs <br /> TPH Mass GW Mass x Average Concentration <br /> TPH Mass = (392,000 lbs x (5511,000,000,000) = 0 02156 lbs <br />' TPH Mass = 0 02156 lbs <br />' 3114197 <br /> Estimated Volume of Impacted GW 1400 sq ft x 8 ft 11,200 cu ft <br />' Estimated Average Concentration 38 ppb <br /> Estimated Soil Porosity 35% <br /> Ground Water Mass Volume x Density x Porosity _ <br /> Ground Water Mass = (11,200 cu ft )x (100 lbs/cu ft ) x ( 35) = 392,000 lbs <br /> TPH Mass GW Mass x Average Concentration <br /> lie TPH <br /> Mass = (392,000 lbs x(3811,000,000,000) = 0 014896 lbs <br /> TPH Mass = 0 014896 lbs <br />' 7122197 <br /> Estimated Volume of Impacted GW 1400 sq ft x 8 ft = 11,200 cu ft <br /> Estimated Average Concentration <50 ppb <br />' Estimated Sod Porosity 35% <br /> Ground Water Mass Volume x Density x Porosity _ <br /> Ground Water Mass = (11,200 cu ft )x (100 lbs /cu ft ) x ( 35) = 392,000 lbs <br />' TPH Mass GW Mass x Average Concentration <br /> TPH Mass = (392,000 lbs ) x <5011,000,000,000) = <0 0196 lbs <br />' TPH Mass = <0 0196 lbs <br />' ASSUMPTIONS <br /> Estimated Volume of Impacted Groundwater is based on an eight foot vertical zone of historical ground <br />' water fluctuation (from 2196 to 7197) See Table 1 -Water Level Data <br /> Estimated Average Concentration of TPH-g is based on an average of levels detected in all applicable <br /> samples analyzed on the date indicated See Table 2 -Analytical Results Ground Water <br /> 1 <br /> 1 <br />' L IENSR18716100218716002 water As <br />