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10,000 <br /> rn <br /> E 8,000 • <br /> vi <br /> z <br /> 0 <br /> Q <br /> RANGE OF CONCENTRATIONS <br /> Z 6,000 CrTOT, Cu, As <br /> w <br /> U <br /> Z <br /> O <br /> U I <br /> -J 4,000 MEAN OF CONCENTRATIONS <br /> CrTOT, Cu, As <br /> O <br /> 2,000 — <br /> ............ <br /> ....,... <br /> SEDIMENT SURFACE 0-I, 1-2, 2-3, 3-4 <br /> SAMPLE DEPTH FIGURE 2 <br /> RANGE AND MEAN <br /> OF CONTAMINANT <br /> CONCENTRATIONS <br />