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Outlier Analysis Summary Page I <br /> Date:3/31/06,10:04 AM Facility:Austin Road LF <br /> Data File:AUSTININ Client:Austin Road LF <br /> Constituent Well Outlier N Mean Std. Dev. Tn Distribution Normalily Test <br /> Arsenic Dissolved(mg/L) AMW-2 No 19 0.004026 0.001689 2.532 Normal Shapiro Wilk <br /> Barium Dissolved(mg/L) AMW-2 No 19 0.1561 0.03553 2.532 Normal Shapiro Wilk <br /> Bicarbonate as CaCO3(mg/L) AMW-2 Yes 46 322.3 89.33 2.914 Normal Shapiro Wilk <br /> Calcium Dissolved(mg/L) AMW-2 No 11 105.7 23.09 2.234 Unknown Shapiro Wilk <br /> Carbonate as CaCO3(mg/L) AMW-2 Yes 46 1.383 1.71 2.914 Unknown Shapiro Wilk <br /> Chloride(mg/L) AMW-2 Yes 71 54.9 49.93 3.076 Log-normal Shapiro Wilk <br /> Chromium [Hexavalent]Dis. (mg/L) AMW-2 No 13 0.003415 0.001269 2.331 Normal Shapiro Wilk <br /> Magnesium Dissolved(mg/L) AMW-2 No 11 49.09 10.53 2.234 Unknown Shapiro Wilk <br /> Nitrate as N(mg/L) AMW-2 Yes 71 25.23 19.21 3.076 Unknown Shapiro Wilk <br /> Oil&Grease(mg/L) AMW-2 No n/a n/a 0 n/a n/a n/a <br /> Potassium Dissolved(mg/L) AMW-2 No 11 8.645 1.003 2.234 Normal Shapiro Wilk <br /> Sodium Dissolved(mg/L) AMW-2 No 11 67.64 9.708 2.234 Unknown Shapiro Wilk <br /> Specific Conductance[Field](umhos/cm) AMW-2 Yes 72 948.8 224.9 3.087 Unknown Shapiro Wilk <br /> Strontium Dissolved(ug/L) AMW-2 No 11 1040 214.1 2.234 Unknown Shapiro Wilk <br /> Sulfate as SO4(mg/L) AMW-2 No 69 86.42 33.62 3.076 Normal Shapiro Wilk <br /> Temperature(Deg-C) AMW-2 No 41 18.39 1.541 2.877 Normal Shapiro Wilk <br /> Total Dissolved Solids[TDS](mg/L) AMW-2 No 70 667.6 160.4 3.082 Normal Shapiro Wilk <br /> Turbidity(NTU) AMW-2 No 41 19.52 27.64 2.877 Unknown Shapiro Wilk <br /> Volatile Petroleum Hydrocarbons(ug/L) AMW-2 Possible n/a rila 0 n/a n/a n/a <br /> PH [Field](su) AMW-2 No 70 7.458 0.3568 3.082 Normal Shapiro Wilk <br /> ,8.6.005. <br /> • )16ERST OOCIATES, INC. <br />