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TABLE 5-4 (continued) <br /> SUMMARY GROUND WATER SAMPLE ANALYTICAL RESULTS <br /> TOTAL CHROMIUM, Cr'6 AND TOTAL LEAD <br /> t, IDE <br /> 3rd qtr-1990 NJ NJ NI <br /> 4th qtr-1990 NI NI NJ <br /> Ist qtr-1991 NJ NJ NJ <br /> 2nd qtr-1991 NJ NJ NJ <br /> 3rd qtr-1991 Ni NJ NJ <br /> 4th qtr-1991 NI NJ NJ <br /> Ist qtr-1992 0.017 0.011 <0.0050 <br /> 2nd qtr-1992 0.017 <0.010 <0.0050 <br /> 3rd qtr-1992 0.013 0.01 <O.0b50 <br /> 4th qtr-1992 0,013 <0.010 <0,0050 <br /> MW-20A 1st qtr-1993 0.029 0.012 <0.0050 <br /> 2nd qtr-1993 0.034 0.013 <0.0050 <br /> 3rd qtr-1993 0.027 <0.010 <0.0050 <br /> Number of Detects 7 4 0 <br /> Number of Analyses 7 7 7 <br /> Percent Detected 100 57 ND <br /> Minimum Concentration Detected 0.013 0.005 ND <br /> Maximum Concentration Detected 0.034 0.013 ND <br /> Average Concentration 0.021 0.009 ND <br /> Geometric Mean Concentration` 0,020 0.008 ND <br /> Standard Deviation 0.008 0.004 ND <br /> MCL 0.05 NR 0.05 <br /> 1 <br /> • <br /> 1 <br /> 1u/csing/tTacy/ri/Lab1cs/ritb154 5-4-18 <br />