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V H. KLEINFELDER &ASSOCIATES <br /> 6), variable permeability (Table 8) and complex transport pathways it is <br /> dif`icult to estimate the total quantity of hydrocarbons present in the <br /> vadose zone sediments, The estimates shown in Table 9 were calculated <br /> from the area of TPH concentrations shown in Figure 36 extrapolated <br /> areally rising Figures 21 and 22. These estimates show an approximate 880 <br /> yd3 of soil containing TPH above 10i <br /> ppm or less than lOX of the site ` <br /> material above 38 feet. <br /> i <br /> two 4: jr! � <br /> a <br /> J <br /> t <br /> r <br /> j <br /> i <br /> 53-87-443 26 <br />