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Table 4: Summary statistics for manganese and zinc data used in the present analysis (S.D. is <br /> standard deviation, Max. is maximum, Min. is minimum, n is the number of samples with results <br /> above the detection limit, N.D. is not detected). <br /> Man anese(mg/L Zinc m /L <br /> Drainage Well Geomean S.D. Max. Min. n Geomean S.D. Max. Min. n <br /> Are qua CRMW 3A-35 0.24 0.44 2.06 0.01 84 0.08 0.06 0.31 0.01 81 <br /> CRMW 313-63 4.27 1.43 10.40 0.07 141 0.07 0.04 0.40 0.03 117 <br /> Geomean 1.01 225 0.07 198 <br /> Grassy GVMW 8A-250 0.40 0.21 0.93 0.01 83 1 N.D. <br /> GVMW 813-50 0.03 0.04 1 0.14 0.01 14 N.D. <br /> GVMW 22A-70 0.03 0.02 0.11 0.01 20 N.D. <br /> GVMW 2213-30 0.07 0.10 0.38 0.01 18 N.D. <br /> Geomean 0.07 135 N.D. <br /> Vindicator VIN 2A-270 0.03 0.01 0.05 0.02 13 0.08 0.04 0.17 0.05 9 <br /> VIN 213-140 2.63 0.53 3.45 0.78 1 56 N.D. <br /> Geomean 0.28 69 0.08 9 <br /> Wilson WCMW 3-134 0.03 0.03 0.26 0.01 70 1 0.007 0.002 0.011 1 0.005 26 <br /> WCMW 6-234 0.16 0.02 0.27 0.10 90 0.012 0.004 0.017 0.010 3 <br /> Geomean 0.06 160 0.01 29 <br /> Squaw SGMW 66-60 4.79 1.53 7.14 2.78 10 0.24 0.16 0.56 0.11 10 <br /> Poverty PGMW 1A-200 8.61 1.52 10.3 6.09 6 0.61 0.28 1.15 0.37 6 <br /> PGMW 1 B-55 18.27 2.25 22.5 2.25 9 2.20 0.35 2.97 1.77 9 <br /> Geomean 13.52 1.32 <br /> 1400 - <br /> 1200 _- -- ----.- <br /> 600 <br /> 20D <br /> o _ <br /> & & 8 8 8 8 8 8 8 8 8 8 8 0 0 0 0 0 ((0VV 0 0 <br /> i v\f O O V O l�.1 M N1 <br /> .-1 'I '1 rl .-1 .-I ti .-1 <br /> -+--CRMW 3A-35 -+-CRMW 3B-63 - NPL <br /> Figure 3: Sulfate concentration in the two Arequa Gulch monitor wells,and the proposed NPL. <br />