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6 9 0 <br />LC-1 Surface Water Site Purgatorie River Downstream <br /> STATISTICS <br />Parameters Year 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 Mean Minimum Maximum <br />Flow cfs 2.6 0.4 0.5 4.3 2.5 1.6 1.1 0.1 6.6 0.4 0.4 0.7 0.5 1.6 0.4 6.6 <br />Flow, Minimum cfs 0.2 0.1 0.2 0.6 0.8 0.8 0.6 0.2 4.0 0.3 0.2 0.4 1.0 0.1 4.0 <br />Flow, Maximum ds 4.1 0.9 0.8 8.0 4.1 2.5 1.8 2.0 9.2 0.5 0.5 0.9 0.8 0.2 9.2 <br />pH (field) standard 8.09 8.45 8.3 7.76 7.4 7.60 7.5 7.2 8.3 8.54 8.63 8.5 8.56 8.06 7.2 8.63 <br />pH, Minimum (field) standard 6.15 8.34 8.17 7.3 7.3 7.4 7.4 7.9 8.1 8.3 8.4 8.5 8.49 6.2 8.4 <br />H Maximum field standard 8.88 8.57 8.43 8.49 7.4 7.8 7.7 8.5 8.6 8.78 8.79 8.55 8.63 7.4 8.88 <br />H Lab standard 8.3 8.4 8.2 8.3 8.2 8.2 8.56 8 8.5 8.7 8.5 8.3 8.35 8.0 8.7 <br />Conductance umhos/cm 532 446 516 493 489 450 915 1123 882 746 1014 1038 966 739.23 446 1123 <br />Conductance, Minimum umhos/cm 340 305 436 348 355 430 355 920 828 734 930 985 910 305.0 930 <br />Conductance, Maximum 915 551 617 610 623 485 1532 1310 936 760 1078 1091 1023 485 1310 <br />Conductivity 25° umhos/cm 494 455 545 830 1157 912 760 988 767.63 455 1157 <br />Temperature °c 13.7 12.3 16.4 9 7.1 7.1 7.8 5.8 7.95 13 15 12 17 11.09 5.8 17 <br />Temperature, Minimum °c 3.3 4.4 7.9 4.7 2.4 4.7 1.1 3.8 4.9 9.2 5.2 2.2 12 1.1 12 <br />Temperature, Maximum °c 26.5 24.8 22.9 11.5 11.8 11 19.9 7.8 11 16.8 23.2 21.8 22 7.8 26.5 <br />Cation-Anion Balance % 2 3 0 0.9 -0.2 0.9 1 5.4 1.8 -0.9 0.9 -7.1 0.64 -7.1 5.4 <br />Sum of Anions megn 5.72 5.56 5.1 5.8 9 12.5 14.3 8.7 8 11.4 10.7 10.6 8.95 5.1 14.3 <br />Sum of Cations megn 5.92 5.92 5.1 5.9 9 12.6 14.6 9.7 8.3 11.2 10.9 9.2 9.03 5.1 14.6 <br />Dissolved 0 en p pm 7.7 7.8 7.75 7.7 7.8 <br />Iron (total) mgn 0.23 0.05 0.51 0.16 0.25 0.24 1.1 0.16 0.67 0.44 0.25 0.37 0.05 1.1 <br />Iron (total recoverable) mgn 0.29 0.12 0.67 0.16 0.23 0.26 0.75 0.1 0.52 0.45 3.81 0.21 0.63 0.1 3.81 <br />Iron dissolved mgn 0.04 <br />TSS mgn 10 3 22 18 <5 <5 <5 13.25 3 22 <br />TDS @ 180C mgn 300 290 280 320 485 670 750 520 440 610 580 570 484.58 290 750 <br />TDS (calculated) mgn 313 309 276 318 499 687 784 495 443 625 586 535 489.17 309 784 <br />TDS Ratio Meas/Calc. mgn 1 1 1 1.01 0.97 0.98 0.96 1.05 0.99 0.98 0.99 1.07 1.00 0.96 1.07 <br />Total Alkalinity mgn 208 214 196 209 277 397 491 276 293 376 385 409 310.92 196 491 <br />Carbonate mgn 4 11 9 <2 6 8 17 <2 18 35 22 6 <2 35 <br />Bicarbonate mgn 206 203 187 209 272 390 474 276 275 341 363 403 299.92 187 474 <br />Nitrogen, ammonia mgn <.05 <.05 <.05 0.07 <.05 <.05 <.05 <.05 <.05 0.07 <br />Ammonia as N, unionized mgn <.01 <.01 <.01 <.01 <.01 <.01 <.01 <.01 <br />Lead, (dissolved) mgn <.001 0.001 <.04 <.04 0.001 0.001 0.0002 <.04 <.04 <.04 0.0008 0.0002 <.04 <br />Manganese (total) mgn 0.008 <.005 0.015 0.006 0.009 0.017 0.026 0.007 0.015 0.011 0.178 0.008 0.027 <.005 0.178 <br />Manganese dissolved mgn <.005 <.005 <.005 <.005 <.005 0.01 <.005 <.005 0.006 <.005 0.012 0.006 <.005 0.01 <br />Selenium mgn 0.001 0.001 0.002 0.002 <.002 0.002 <.001 <.04 <.001 0.00 <.001 <.04 <br />Sodium dissolved m 51.6 46.5 38.3 49.6 97 181 256 132 116 185 162 146 121.75 38.3 256 <br />Chloride mgn 3.7 5 7 43 96 122 69 49 100 71 65 57.34 3.7 122 <br />Sulfate mgn 68 57 50 70 110 90 50 60 40 50 48 29 60.17 48 110 <br />Calcium dissolved mgn 45.4 45.2 47.3 56.4 50.9 32 48.8 37 31 45 30.1 42.65 30.1 56.4 <br />Magnesium (dissolved) mgn 16.1 16.5 14.6 16.8 23 25.2 20.4 18 16.2 17.5 18 14.8 18.09 14.6 25.2 <br />Potassium dissolved mgn 2.1 1.8 1.5 1.8 2 2.5 2.6 2 2.2 2.3 1.9 2 2.06 1.5 2.6 <br />Hydroxide mgn <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <br />Fluoride mgn <br />Mercury mgn <br />SAR standard 1.7 1.47 1.28 1.6 2.78 5.36 8.81 4.15 4.05 6.83 5.22 5.51 4.06 1.28 8.81 <br />Zinc mgn 0.14 <.001 <.01 <.01 0.01 0.01 <.01 <.01 0.01 0.02 <.01 0.14 <br />Hardness mgn 180 194 173 187 236 231 164 196 159 149 186 136 182.58 136 236