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TABLE 5-4 (continued) <br /> SUMMARY GROUND WATER SAMPLE ANALYTICAL RESULTS <br /> • TOTAL CHROMIUM, Cr+6, AND TOTAL LEAD <br /> Morrill <br /> el < <br /> g>1} <br /> V� 11Q wren#.: Chro � a.. i.ead" <br /> ... ....... . .. ...... ........ ......... <br /> 3rd qtr-1990 NI NI NI <br /> 4th qtr-1990 0.28 NA 0.094 <br /> 1st qtr-1991 0.022 NA 0.015 <br /> 2nd qtr-1991 0.0029 NA <0.0050 <br /> 3rd qtr-1991 0.0022 NA <0.0050 <br /> 4th qtr-1991 0.031 NA <0.0050 <br /> 1st qtr-1992 0.0021 <0.010 <0.0050 <br /> 2nd qtr-1992 0.0016 <0.010 <0.0050 <br /> 3rd qtr-1992 0.0013 <0.010 <0.0050 <br /> 4th qtr-1992 0.0014 <0.010 <0.0050 <br /> MW-9A 1st qtr-1993 0.0028 <0.010 <0.0050 <br /> 2nd qtr-1993 0.0019 <0.010 <0.0050 <br /> 3rd qtr-1993 0.0016 <0.010 <0.0050 <br /> Number of Detects 12 0 2 <br /> Number of Analyses 12 7 12 <br /> Percent Detected 100 ND 17 <br /> Minimum Concentration Detected 0.001 ND 0.0025 <br /> Maximum Concentration Detected 0.280 ND 0.094 <br /> Average Concentration 0.029 ND 0.011 <br /> Geometric Mean Concentration` 0.004 ND 0.004 <br /> Standard Deviation 0.080 ND 0.026 <br /> 3rd qtr-1990 NI NI NI <br /> 4th qtr-1990 NI NI NI <br /> 1st qtr-1991 0.04 NA 0.016 <br /> 2nd qtr-1991 0.001 NA <0.0050 <br /> 3rd qtr-1991 0.0029 NA <0.0050 <br /> 4th qtr-1991 <0.0020 NA <0.0050 <br /> 1st qtr-1992 0.0014 <0.010 NA <br /> 2nd qtr-1992 0.0012 <0.010 NA <br /> 3rd qtr-1992 <0.0010 <0.010 NA <br /> 4th qtr-1992 <0.0010(<0.0010) <0.010(<0.010) <0.0050(<0.0050) <br /> MW-10A 1st qtr-1993 <0.0010 <0.010 NA <br /> 2nd qtr-1993 0.0016 <0.010 NA <br /> 3rd qtr-1993 0.001 <0.010 NA <br /> Number of Detects 7 0 1 <br /> Number of Analyses 11 7 5 <br /> Percent Detected 64 ND 20 <br /> Minimum Concentration Detected 0.001 ND 0.0025 <br /> Maximum Concentration Detected 0.040 ND 0.016 <br /> Average Concentration 0.005 ND 0.005 <br /> Geometric Mean Concentration` 0.001 ND 0.004 <br /> Standard Deviation 0.012 ND 0.006 <br /> /u/csing/tracy/ri/tables/ritbl5-4 5-4-8 <br />