1988-04-11_PERMIT FILE - C1981008A (9)

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NUCLA EAST MINE GROUND WATER EQUALITY STATISTICS REPORT SAMPLE POINT GW-N20(WB0020) LOCATION 46N15W6BAA GEOLOGIC UNIT DAKOTA COAL OBSERVATIONS MEAN ST.DEV. MIN MAX FIELD PARAMETERS CONDUCTIVITY (UMHOS/CM) 5 1730.00 432.67 1300.00 2350.00 PH (UNITS) 5 5.11 4.68 5.82 WATER TEMPERATURE (DEG C) 5 12.94 1.69 11 .10 15.60 DEP111 TO WATER (FT) 5 20. 14 3.15 15.69 23.23 LABORATORY PARAMFTERS ALKALINITY, DISS. (MG/L OF CAC03) 5 29.60 25.74 0.00 58.00 ALUMINUM, DISS. (MG/L) 5 4.94 6.48 0.41 15.10 ARSFNIC, DISS. (UG/L) 5 1.60 1.34 1 .00 4.00 BARIUM, DISS. (UG/L) 2 15.00 7.07 10.00 20.00 BICARBONATE, DISS. (MG/L) 5 36.20 31.33 0.00 71 .00 BORON, DISS. (UG/L ) 5 352.00 155.15 120.00 500.00 CADMIUM, DISS. (UG/L) 5 5.00 0.00 5.00 5.00 CALCIUM, DISS. (MG/L) 5 338.80 75.70 255.00 434.00 CARBONATE, DISS. (MG/L) 5 0.00 0.00 0.00 0.00 CHLORIDE, DISS. (MG/L) 5 6.80 0.84 6.00 8.00 CHROMIUM, DISS. (UG/L) 3 10.00 0.00 10.00 10.00 CONDUCTIVITY @ 25 DEG C (UMHOS/CM) 5 2254.00 466.62 1720.00 2930.00 COPPER, DISS. (UG/L) 5 10.00 0.00 10.00 10.00 ILUORIDE, DISS. (MG/L) 5 1.11 0.68 0.17 2.00 HARDNESS AS CAC03 (MG/L) 5 1425.00 382.32 1031 .00 1913.00 IRON, DISS. (MG/L) 5 40.60 7.72 31 .30 51.80 i LEAD, DISS. (UG/L) 5 30.00 22.36 20.00 70.00 o MAGNESIUM, DISS. (MG/L) 5 141 .00 47.27 96.00 202.00 MANGANESE, DISS. (MG/L) 5 1.66 0.118 0.96 2.26 MERCURY, DISS. (UG/L) 5 0.20 0.00 0.20 0.20 MOLYBDENUM, DISS. (UG/L) 5 50.00 0.00 50.00 50.00 NICKEL, DISS. (UG/L) 2 30.00 14.14 20.00 40.00 NIIROGEN, AMMONIA, DISS. (MG/L) 5 1.59 0.15 1.34 1 .73 NITROGEN, NITRATE, DISS. (MG/L) 5 0.03 0.03 0.01 0.07 NITROGEN, NITRITE, DISS. (MG/L) 1 0.01 0.01 0.01 PH C 25 DEG C 5 5.03 4.50 6.10 PHOSPHATE AS PO4, DISS. (MG/L) 3 0.13 0.06 0. 10 0.20 POTASSIUM, DISS. (MG/L) 5 11.60 2.19 9.00 15.00 SELENIUM, DISS. (UG/L) 5 1.00 0.00 1 .00 1 .00 SILVER, DISS. (UG/L) 3 10.00 0.00 10.00 10.00 SODIUM, DISS. (MG/L) 5 44.80 9.44 37.00 57.00 SAR 4 0.52 0.05 0.47 0.57 SULFATE, DISS. (11G/L) 5 1577.20 453.75 1085.00 2196.00 SULFIDE, TOTAL (MG/L) 1 0.20 0.20 0.20 SUSPENDED SOLIDS (MG/L) 5 235.20 166.58 22.00 480.00 ZINC, DISS. (MG/L) 5 0.41 0.25 0.18 0.80 CATION/ANION BALANCE (%) 5 -3.01 1 .66 -5.86 -1 .82 DISS. DISSOLVED SOLIDS 180 DEG (MG/L) 5 2201.20 596.60 1560.00 3060.00 DISS. DISSOLVED SOLIDS, CALCULATED (MG/L 5 2131.80 576.86 1511.00 2910.00 `° ----------------------------------------- INDICAILS NO DATA m a o Table 7-23. Ground Water Quality Statistics Report for GW-N20 co 00