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Outlier Analysis Surnr6ry Page 1 Date:6/10/09,4:07 PM Facility:Austin Road LF Data File:AUSTININ Client:Austin Road LF Constituent Well Ou lier Values Method Ainha N Mean Std. Dev. Distribution Normality Test Arsenic Dissolved(mg/L) AMW-2 No n/a EPA 1989 0.05 32 0.0036470.001499 Normal Shapiro Wilk Barium Dissolved(mg/L) AMW 2 No n/a EPA 1989 0.05 32 0.1557 0.03687 Normal Shapiro Wilk Bicarbonate as CaCO3(mg/L) AMW-2 Yes 79 EPA 1989 0.05 59 341.6 90.28 Normal Shapiro Wilk Calcium Dissolved(mg/L) AMW-2 No n/a EPA 1989 0.05 24 103 22.59 Unknown Shapiro Wilk Carbonate as CaCO3(mg/L) AMW 2 No n/a EPA 1989 0.05 59 1.697 2.071 Unknown Shapiro Wilk Chloride(mg/L) AMW-2 Yes 454,18.3 EPA 1989 0.05 84 54.31 46.11 Log-normal Shapiro Wilk Chromium[Hexavalent]Dis.(mg/L) AMW 2 No n/a EPA 1989 0.05 26 0.0034810.001149 Unknown Shapiro Wilk Magnesium Dissolved(mg/L) AMW2 No n/a EPA 1989 0.05 24 48.5 10.27 Unknown Shapiro Wilk Nitrate as N(mg1L) AMW-2 Yes 1.4,125 EPA 1989 0.05 84 25.92 17.99 Unknown Shapiro Wilk Oil&Grease(mg/L) AMW-2 n/a n/a n/a n/a 24 n/a 0 Unknown Shapiro Wilk Potassium Dissolved(mg/L) AMW-2 No n/a EPA 1989 0.05 24 8.658 0.9677 Unknown Shapiro Wilk Sodium Dissolved(mg/L) AMW2 No n/a EPA 1989 0.05 24 65.58 9.259 Unknown Shapiro Wik Specific Conductance[Field](umhos/cm) AMW-2 Yes 389 EPA 1989 0.05 85 964.5 231 Log-normal Shapiro Wilk Strontium Dissolved(ug/L) AMW2 No n/a EPA 1989 0.05 24 1053 210.3 Unknown Shapiro Wilk Sulfate as SO4(mg/L) AMW2 No n/a EPA 1989 0.05 82 88.06 32.35 Normal Shapiro Wilk Temperature(Deg-C) AMW-2 No n/a EPA 1989 0.05 54 18.4 1.399 Normal Shapiro Wik Total Dissolved Solids[TDS](mg/L) AMW2 No n/a EPA 1989 0.05 83 683.3 160.9 Unknown Shapiro Wik Turbidity(NTU) AMW-2 No n/a EPA 1989 0.05 54 15.41 25.16 Unknown Shapiro Wilk Volatile Petroleum Hydrocarbons(ug/L) AMW-2 n/a n/a n/a n/a 24 n/a 0 Unknown Shapiro Wilk PH[Field](su) AMW2 No n/a EPA 1989 0.05 83 7.43 0.3593 Normal Shapiro Wilk ERST & ASSOCIATES, INC®