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TABLE 5-4 (continued) <br /> SUMMARY GROUND WATER SAMPLE ANALYTICAL RESULTS <br /> TOTAL CHROMIUM, Cr+6, AND TOTAL LEAD <br /> 3rd qtr-1990 NI N] Ni <br /> 4th qtr-1990 Ni NI N1 <br /> 1st qtr-1991 NI NI NI ' <br /> 2nd qtr-1991 NJ NI NI <br /> 3rd qtr-1991 NI N1 NI <br /> 4th qtr-1991 Ni N1 NI ' <br /> 1st qtr-1992 0.018 <0.010 <0.0050 <br /> 2nd qtr-1992 0.02 0.034 <0.0050 <br /> 3rd qtr-1992 0.014 0.012 <0.0050 <br /> 4th qtr-1992 0.011 0.015 <0,0050 <br /> MW-15B 1st qtr-1993 0.018 0.011 <0.0050 <br /> 2nd qtr-1993 0.015 0.017 <0.0050 <br /> 3rd qtr-1993 0,016 0.013 <0.0050 <br /> Number of Detects 7 6 0 <br /> Number of Analyses 7 7 7 ' <br /> Percent Detected 100 86 ND <br /> Minimum Concentration Detected 0.011 0.005 ND <br /> Maximum Concentration Detected 0.020 0.034 ND ' <br /> Average Concentration 0.016 0.015 ND <br /> Geometric Mean Concentration` 0.016 0.013 ND <br /> Standard Deviation 0.003 0.009 ND <br /> 3rd qtr-1990 NI N1 NI , <br /> 4th qtr-1990 NI NI NI <br /> isl qtr-1991 N1 NI NI <br /> 2nd qtr-1991 NI NI NI ' <br /> 3rd qtr-1991 NI NI NI <br /> 4th qtr-1991 0.044 NA 0.011 <br /> 1st qtr-1992 0.012 <0.010 <0.0050 ' <br /> 2nd qtr-1992 0.011 <0.010 <0.0050 <br /> 3rd qtr-1992 0.012 <0.010 <0.0050 <br /> 4th qtr-1992 0.0092 <0.010 <0.0050 ' <br /> NI W-16A 1 st qtr-1993 0.011 <0.010 <0.0050 <br /> 2nd qtr-1993 0.018 <0.010 <0.0050 <br /> 3rd qtr-1993 0.024 <0.011 <0.0050 <br /> Number of Detects a 0 1 <br /> Number of Analyses 8 7 8 <br /> Percent Detected 100 ND 13 <br /> Minimum Concentration Detected 0.009 ND 0.0025 <br /> Maximum Concentration Detected 0.044 ND 0.011 <br /> Average Concentration 0.018 ND 0.004 ' <br /> Geometric Mean Concentration' 0.015 ND 0.003 <br /> Standard Deviation 0.012 ND 0.003 <br /> lulcsing/tracy/riltablcslritbl5-4 5-4-14 <br />