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r '.I <br /> -F <br /> Ii <br /> " - 1 <br /> }Ci <br /> As summarized in Table 5, the average concentration of TPH-as-gasoline in the upper i <br /> cylinder would be calculated as follows: <br /> TPHg average = (560+4.5+0)13 Samples'= 188.2 ppm <br /> Using the same assumptions described above, the mass of TPH-as-gasoline remaining in <br /> soil following one year of SVE is as follows: <br /> } <br /> TPHg mass= (25,132)#t -sej(11.64"- 4)(188.2 Ib TPHg) = 520 Ib TPH-as-gasoline <br /> �` -1(ft ,'sG4) (106.Ib sell) <br /> 4) <br /> These mass balance calculations indicate that SVE removed approximately 8,251 pounds of <br /> it <br /> Q TPH-as-gasoline and all of the 28'19'pounds of benzene. This represents approximately 94% <br /> of the TPH-as-gasoline.and 100%'of the benzene present prior to SVE. <br /> iILI <br /> I <br /> ci <br /> t <br /> I <br /> 4 - <br /> I 1 <br /> I C# 1 <br />