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FIGURE 4 <br /> PCE CONCENTRATIONS VS TIME IN SITE WELLS <br /> 1000 <br /> x <br /> 100 <br /> CL <br /> a , <br /> o <br /> H 10lo <br /> z <br /> Lu 41 <br /> z <br /> tj <br /> V <2 0 <br /> Lu <br /> U <br /> a 1 <br /> 01 <br /> O r N It (o co 0) e-- N (D 0 m <br /> 0 00 f— to !f) r C7 C7 N rn 00 (D <br /> M 11 LC) (D N 00 C) O Q N (o <br /> DAYS SINCE INITIAL SAMPLE <br /> �---MW1 -a--MW2 ---A-MW3 --G--MW4 -)-MW5 --e-MW6 -x-MW7 <br />