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VOCs CONCENTRATION IN EXTRACTED SOIL VAPOR <br /> ug/L. <br /> 1001000 <br /> 10,000 <br /> 1 ,000 <br /> 100 -_ <br /> 10 <br /> 0 <br /> Oct-99 Jan-00 Apr-00 Aug-00 Nov-00 <br /> P 9 <br /> DATE --- <br /> FIGURE 3 <br />