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TABLE 4-4 RCRA STATISTICAL ANALYSIS MW-1 JULY 10, 1989 Below Detected Sample Detection Standard Coefficient 95 %* Metals & Minerals Size Limit Mean Median Deviation of Variance Minimum Maximum Range Arsenic 4** 0 0.006 0.006 0.00 0.00 0.006 0.006 0.006 Barium 4 3 0.01 0.01 0.00 40.00 0.01 0.01 0.01 Boron 4 0 0.13 0.12 0.01 8.00 0.12 0.14 0.11 -0.15 Chromium 4 2 0.01 0.01 0.01 69.28 0.01 0.02 0- 0.03 Copper 4 1 0.01 0.01 0.01 80.63 0.01 0.03 0- 0.03 Manganese 4 0 0.03 0.03 0.00 0.00 0.03 0.03 0.03 Titanium 4 2 0.004 0.004 0.002 44.488 0.003 0.006 0- 0.008 General Minerals Calcium 4 0 15.25 15.50 0.96 6.28 14 16 13 - 17 Magnesium 4 0 11.50 11.50 0.58 5.02 11 12 10 - 13 Potassium 4 0 5.75 6.00 0.50 8.70 5 6 5 - 7 Sodium 4 0 24.50 24.50 1.29 5.27 23 26 22-27 Chloride 4 0 11.00 11.00 0.82 7.42 10 12 9 - 13 Sulfate 4 0 7.00 7.00 0.00 0.00 7 7 7 Nitrate as N 4 0 0.67 0.66 0.02 3.32 0.65 0.7 0.63 - 0.71 Total Dissolved Solids 4 0 151.25 153.50 25.17 16.64 121 177 100- 201 Total Organic Carbon 4 1 0.96 0.75 0.80 83.48 0.3 2.1 -0-2.5 Chemical Oxygen Demand 4 3 3.63 2.50 2.25 62.07 3 7 0 - 8 Total Alkalinity CaCO3 4 0 110.00 110.00 0.82 0.74 109 ill 108 - 112 Bicarbonate as CaCO3 4 0 110.00 110.00 0.82 0.74 109 ill 108 - 112 � H 4 0 8.00 8.00 0.00 0.00 8 8 8 C 4 0 290.50 290.50 4.65 1.60 285 296 281 -300 Notes: -Not Detected(ND)values handled as 0.5 times the detection limit for that constituent. -95%range is defined as the mean +/-two standard deviations and contains 95%of the observations in a normal population distribution. Arsenic was reported by the analytical laboratory twice for each sample,once by ICAP(detection limit of 0.1 mg/L) and once by GFAA (detection limit of 0.005 mg/L).Only the GFAA results were used for this statistical analysis. Metals and minerals not shown on this Table were not detected in the four water samples. k" KLE1 N FELDER F7-90-1