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TABLE 5-4 (continued) <br /> SUMMARY GROUND WATER SAMPLE ANALYTICAL RESULTS <br /> TOTAL CHROMIUM, Cr+6, AND TOTAL LEAD <br /> 1o >E�i�1�.. <br /> I <br /> 1�1�,11� ; merit l�h»niii>m� * I.elti <br /> ... ... ...... <br /> 3rd qtr-1990 NI NI NI <br /> 4th qtr-1990 NI NI NI <br /> lst qtr-1991 0.062 NA 0.023 <br /> 2nd qtr-1991 0.014 NA <0.0050 <br /> 3rd qtr-1991 0.014 NA <0.0050 <br /> 4th qtr-1991 0.014 NA <0.0050 <br /> 1st qtr-1992 0.013 <0.010 NA <br /> 2nd qtr-1992 0.43 0.014 NA <br /> 3rd qtr-1992 0.012(0.012) 0.011 (0.011) NA <br /> 4th qtr-1992 0.012 <0.010 <0.0050(<0.0050) <br /> MW-12B 1st qtr-1993 0.014 0.011 NA <br /> 2nd qtr-1993 0.017 0.018 NA <br /> 3rd qtr-1993 0.016 0.012 NA <br /> Number of Detects 11 5 1 <br /> Number of Analyses 11 7 5 <br /> Percent Detected 100 71 20 <br /> Minimum Concentration Detected 0.012 0.005 0.0025 <br /> • Maximum Concentration Detected 0.430 0.018 0.023 <br /> Average Concentration 0.056 0.011 0.007 <br /> Geometric Mean Concentration` 0.022 0.010 0.004 <br /> Standard Deviation 0.125 0.005 0.009 <br /> 3rd qtr-1990 NI NI NI <br /> 4th qtr-1990 NI NI NI <br /> 1st qtr-1991 0.04 NA 0.005 <br /> 2nd qtr-1991 0.014 NA <0.0050 <br /> 3rd qtr-1991 0.018 NA <0.0050 <br /> 4th qtr-1991 0.017 NA <0.0050 <br /> 1st qtr-1992 0.17 0.15 NA <br /> 2nd qtr-1992 0.17 0.15 NA <br /> 3rd qtr-1992 0.12 0.12 NA <br /> 4th qtr-1992 0.11 0.14 <0.0050 <br /> MW-13A 1st qtr-1993 0.22 0.12 NA <br /> 2nd qtr-1993 0.015 0.14 NA <br /> 3rd qtr-1993 0.14 0.16 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 0.014 0.120 0.0025 <br /> Maximum Concentration Detected 0.220 0.160 0.005 <br /> Average Concentration 0.094 0.140 0.003 <br /> • Geometric Mean Concentration` 0.059 0.139 0.003 <br /> Standard Deviation 0.076 0.015 0.001 <br /> /u/wing/tracy/ri/tables/ritbl5-4 5-4-1 1 <br />