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TABLE 5-4 (continued) <br /> SUMMARY GROUND WATER SAMPLE ANALYTICAL RESULTS <br /> TOTAL CHROMIUM, Cr+6, AND TOTAL LEAD <br /> .............................................................................................................................................................................................................................................. <br /> .............................................................................................................................................................................................................................................. <br /> lnt>r� g <br /> ... <br /> Ih :<:>: ent': rniriiiii� :>. fir.*�.`. :.. i. :. <br /> .. .. ...... .. . <br /> 3rd qtr-1990 NI NI NI <br /> 4th qtr-1990 0.025 NA 0.0068 <br /> 1st qtr-1991 0.0045 NA 0.0087 <br /> 2nd qtr-1991 <0.005 NA 0.0087 <br /> 3rd qtr-1991 0.001 NA <0.0050 <br /> 4th qtr-1991 0.12 NA 0.016 <br /> 1st qtr-1992 <0.0010 <0.010 NA <br /> 2nd qtr-1992 0.0011 (<0.0010) <0.010(<0.010) NA <br /> 3rd qtr-1992 <0.0010 <0.010 NA <br /> 4th qtr-1992 0.0011 <0.010 <0.0050 <br /> MW-7A 1st qtr-1993 0.0014 <0.010 NA <br /> 2nd qtr-1993 0.0012 <0.010 NA <br /> 3rd qtr-1993 0.0014 <0.010 NA <br /> Number of Detects 9 0 4 <br /> Number of Analyses 12 7 6 <br /> Percent Detected 75 ND 67 <br /> Minimum Concentration Detected 0.0005 ND 0.0025 <br /> • Maximum Concentration Detected 0.120 ND 0.016 <br /> Average Concentration 0.013 ND 0.008 <br /> Geometric Mean Concentration` 0.002 ND 0.006 <br /> Standard Deviation 0.034 ND 0.005 <br /> 3rd qtr-1990 NI NI NI <br /> 4th qtr-1990 0.063 NA 0.018 <br /> 1st qtr-1991 0.013 NA 0.0056 <br /> 2nd qtr-1991 0.0073 NA <0.0050 <br /> 3rd qtr-1991 0.0066 NA <.0050 <br /> 4th qtr-1991 0.015 NA 0.036 <br /> 1st qtr-1992 0.0051 <0.010 NA <br /> 2nd qtr-1992 0.0066 <0.010 NA <br /> 3rd qtr-1992 0.0048 <0.010 NA <br /> 4th qtr-1992 0.0054 <0.010 <0.0050 <br /> MW-8A 1st qtr-1993 0.0056 <0.010 NA <br /> 2nd qtr-1993 0.0052 <0.010 NA <br /> 3rd qtr-1993 0.0086 <0.010 NA <br /> Number of Detects 12 0 3 <br /> Number of Analyses 12 7 6 <br /> Percent Detected 100 ND 50 <br /> Minimum Concentration Detected 0.013 ND 0.0025 <br /> Maximum Concentration Detected 0.063 ND 0.036 <br /> Average Concentration 0.012 ND 0.011 <br /> • Geometric Mean Concentration` 0.008 ND 0.006 <br /> Standard Deviation 0.016 ND 0.014 <br /> /u/csing/(racy/ri/tables/ritbl5-4 5-4-7 IN <br />