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TABLE 5-4 (continued) <br /> SUMMARY GROUND WATER SAMPLE ANALYTICAL RESULTS <br /> • TOTAL CHROMIUM, Cr+6, AND TOTAL LEAD <br /> 11{Iealr <br /> Wella lwent` hromit:: � �a I(, a <br /> ... .... <br /> 3rd qtr-1990 NI NI NI <br /> 4th qtr-1990 NI NI NI <br /> 1st qtr-1991 0.26 NA 0.03 <br /> 2nd qtr-1991 0.14 NA <0.0050 <br /> 3rd qtr-1991 0.2 NA <0.0050 <br /> 4th qtr-1991 0.17 NA <0.0050 <br /> 1st qtr-1992 0.16 0.16 NA <br /> 2nd qtr-1992 0.16 0.15 NA <br /> 3rd qtr-1992 0.16 0.15 NA <br /> 4th qtr-1992 0.13 0.13 <0.0050 <br /> MW-13B 1st qtr-1993 0.19 0.13 NA <br /> 2nd qtr-1993 0.12 0.14 NA <br /> 3rd qtr-1993 0.13 0.15 NA <br /> Number of Detects 11 7 1 <br /> Number of Analyses 11 7 5 <br /> Percent Detected 100 100 20 <br /> Minimum Concentration Detected 0.120 0.130 0.0025 <br /> • Maximum Concentration Detected 0.260 0.160 0.030 <br /> Average Concentration 0.165 0.144 0.008 <br /> Geometric Mean Concentration` 0.162 0.144 0.004 <br /> Standard Deviation 0.040 0.011 0.012 <br /> 3rd qtr-1990 NI NI NI <br /> 4th qtr-1990 NI NI NI <br /> 1st qtr-1991 0.012 NA <0.0050 <br /> 2nd qtr-1991 0.005 NA <0.0050 <br /> 3rd qtr-1991 0.0051 NA <0.0050 <br /> 4th qtr-1991 0.02 NA <0.0050 <br /> 1st qtr-1992 0.0073 <0.010 <0.0050 <br /> 2nd qtr-1992 0.0046 <0.010 NA <br /> 3rd qtr-1992 0.0057 <0.010 NA <br /> 4th qtr-1992 0.0035 <0.010 <0.0050 <br /> MW-14A 1st qtr-1993 0.0038 <0.010 NA <br /> 2nd qtr-1993 0.0021 <0.010 NA <br /> 3rd qtr-1993 0.002 <0.010 NA <br /> Number of Detects 11 0 0 <br /> Number of Analyses 11 7 6 <br /> Percent Detected 100 ND ND <br /> Minimum Concentration Detected 0.002 ND ND <br /> Maximum Concentration Detected 0.020 ND ND <br /> Average Concentration 0.006 ND ND <br /> Geometric Mean Concentration` 0.005 ND ND <br /> Standard Deviation 0.005 ND ND <br /> u/csing/traey/ri/tables/ritbl5-4 5-4-12 <br />