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NUCLA MINE GROUND WATER QUALITY STATISTICS REPORT <br /> GEOLOGIC UNIT DAKOTA COAL <br /> OBSERVATIONS MEAN ST.DEV. MIN MAX <br /> FIELD PARAMETERS <br /> CONDUCTIVITY (UMHOS/CM) 14 4278.57 822.56 1640.00 4880.00 <br /> PH (UNITS) 16 6.66 6.48 7.80 <br /> WATER TEMPERATURE (DEG C) 15 13.61 2.16 10.80 18.80 <br /> DEPTH TO WATER ( FT) 17 6.76 0.57 6.05 7.70 <br /> LABORATORY PARAMETERS <br /> ALKALINITY, DISS. (MG/L OF CAC03) 17 559.29 55.52 412.00 640.00 <br /> ALUMINUM, DISS. (MG/L) 13 0.12 0.09 0.05 0.30 <br /> ARSENIC, DISS. (UG/L) 14 1.36 0.50 1.00 2.00 <br /> BARIUM, DISS. (UG/L) 4 207.50 275.85 10.00 600.00 <br /> BICARBONATE, DISS. (MG/L) 10 674.60 51.26 534.00 720.00 <br /> BORON, DISS. (UG/L) 17 466.47 205.91 280.00 1111 .00 <br /> CADMIUM, DISS. (UG/I_) 13 7.17 6.56 0.20 24.00 <br /> CALCIUM, DISS. (MG/L) 17 476.24 26.01 418.00 517.00 <br /> CARBONATE, DISS. (MG/L) 10 0.00 0.00 0.00 0.00 <br /> CHLORIDE, DISS. (MG/L) 17 54.71 13.54 23.00 84.00 <br /> CHROMIUM, DISS. (UG/L) 5 56.00 55.50 10.00 130.00 <br /> CONDUCTIVITY @ 25 DEG C (UMHOS/CM) 17 5856.76 422.96 4800.00 6710.00 <br /> COPPER, DISS. (UG/L) 15 20.40 10.40 10.00 50.00 <br /> FLUORIDE, DISS. (MG/L) 17 1.07 0.39 0.64 2.45 <br /> HARDNESS AS CAC03 (MG/L) 16 4797.69 437.99 3788.00 5680.00 <br /> IRON, DISS. (MG/L) 15 1.18 0.63 0.07 2.19 <br /> v LEAD, DISS. (UG/L) 15 42.00 51.44 20.00 190.00 <br /> MAGNESIUM, DISS. (MG/L) 17 863.18 108.12 588.00 1100.00 <br /> MANGANESE, DISS. (MG/L) 17 2.89 1.51 1.42 7.84 <br /> MERCURY, DISS. (UG/L) 16 2.79 6.73 0.02 20.00 <br /> 00 MOLYBDENUM, DISS. (UG/L) 14 115.29 78.02 14.00 200.00 <br /> NICKEL, DISS. (UG/L) 6 28.33 11.69 20.00 50.00 <br /> NITROGEN, AMMONIA, DISS. (MG/L) 14 0.63 0.25 0.10 1 .32 <br /> NITROGEN, NITRATE, DISS. (MG/L) 17 0.46 0.71 0.01 2.42 <br /> NITROGEN, NITRITE, DISS. (MG/L) 1 0.01 0.01 0.01 <br /> PH @ 25 DEG C 17 6.84 6.60 7.30 <br /> PHOSPHATE AS PO4, DISS. (MG/L) 9 0.12 0.08 0.01 0.30 <br /> POTASSIUM, DISS. (MG/L) 17 23.76 5.04 6.00 29.00 <br /> SELENIUM, DISS. (UG/L) 14 1.50 0.65 1.00 3.00 <br /> SILVER, DISS. (UG/L) 4 12.50 3.32 10.00 17.00 <br /> SODIUM, DISS. (MG/L) 17 210. 12 30.60 108.00 261 .00 <br /> SAR 10 1 .39 0.13 1.23 1 .70 <br /> SULFATE, DISS. (MG/L) 17 4382.41 309.59 3429.00 4860.00 <br /> SULFIDE, TOTAL (MG/L) 1 0.20 0.20 0.20 <br /> SUSPENDED SOLIDS (MG/L) 15 23.80 23.79 5.00 84.00 <br /> < ZINC, DISS. (MG/L) 17 0.06 0.02 0.02 0.10 <br /> CATION/ANION BALANCE (f) 10 1.29 1 .96 -2.00 4.30 <br /> vi DISS. DISSOLVED SOLIDS @ 180 DEG (MG/L) 17 6701.29 357.91 5438.00 7100.00 <br /> 0 DISS. DISSOLVED SOLIDS, CALCULATED (MG/L 10 6512.30 216.62 6252.00 6990.00 <br /> ----------------------------------------- <br /> O�* INDICATES NO DATA <br /> 00 <br /> 00 <br />