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• Fox River Paper Company Concentration Limits / Background Values, per Title 27 CCR See.20400(a)(1) Procedure; Median values for each date were calculated for each analyte by grouping data from the wells on each date. Data from 2002 to present was used. Distribution checked (whether normal or not; WQStats Plus ver. 1.56 was used for all statistical analyses). The concentration limits for each analyte were then calculated across dates. Concentration limits represent the upper 95% confidence interval. For all zones, EC, pH, TD5, chloride,and nitrate had non-normally distributed. For the intermediate zone,sulfate had a non-normal distribution. Semiperched Zone Based on wells OB-10, 08-14, 08-16, OB-17, OB-21, & OB-22 Analyte Units Mean Median Minimum Maximum Upper 95% Limit Bicarbonate mg/L 254 253 176 331 307 Calcium mg/L 38 43 22 51 51 Chloride mg/L 177 166 71 351 178 Electrical conductance umhos/cm 1176 1205 885 1375 1242 Magnesium mg/L 22 19 12 47 26 Nitrate mg/L 3.5 3.4 0.16 5.5 4.3 pH units 6.8 6.8 6.7 7.0 6.9 Potassium mg/L 2.1 2.0 0.8 4.0 2.6 Sodium mg/L 171 172 130 220 184 Sulfate mg/L 102 101 76 123 111 Total dissolved solids mg/L 678 685 549 733 713 Upper Zone Based on wells TH-4, TH-5,&th-9 Analyte Units Mean Median Minimum Maximum Upper 95% Limit Bicarbonate mg/L 343 324 293 432 482 Calcium mg/L 150 158 116 170 209 Chloride mg/L 152 152 22 277 197 Electrical conductance umhos/cm 1443 1500 725 1690 1580 Magnesium mg/L 37 37 25 51 43 Nitrate mg/L 3.2 2.3 0.22 8.5 4.7 PH units 7.4 7.4 7.2 8.1 7.6 Potassium mg/L 8.6 8.7 4.0 12 10 Sodium mg/L 81 87 58 100 89 Sulfate mg/L 122 128 17' 170 150 Total dissolved solids mg/L 915 965 438 1100 1030 W:I Clients I FoxRiver I Water Quality Data I Background I FR-WQPS-Summary.x/s Lawrence 4 Associates