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1 1 LJ 1 GROUND WATER QUALITY PARAMETERS SITE GW-N4R FORMATION DAKOTA COAL DATE OF COLLECTION 05/15/93 09/15/92 FIELD PARAMETERS Conductivity (UMHOS/CM) 4150 4200 pH 6.58 6.63 Water Temperature (DEG C) 17.5 14.5 LABORATORY PARAMETERS ACIDITY, DISS. (mg/1 OF CAC031 0 ALKALINITY, DISS. (mg/1 OF CAC03) 560 556 ALUMINUM, DISS. (mg/1) -O.OS -0.05 ARSENIC, DISS. (µg/1) -L 1 BARIUM, DISS. (µg/1) -10 10 BICARBONATE, DISS. (mg/1 ) 683 528 BORON, DISS. (µg/1) 270 280 CADMIUM, DISS. (µg/1) -5 -5 CALCIUM, DISS. (mg/1) 430 436 CARBONATE, DISS. (mg/1) 0 28 CHLORIDE, DISS. (mg/1> 30 43 CONDUCTIVITY a7 25 DEG C (UMHOS/CM) 5480 5350 COPPER, DISS. (µg/1) -10 -10 FLOURIDE, DISS. <mg/1) 0.6 0.9 HARDNESS AS CAC03 (mg/1) 4027 4657 IRON, TOTAL <mg/1) 1.6 IRON, DISS. (mg/1) 0.08 -0.02 LEAD, DISS. (µg/1) -20 -20 MAGNESIUM, DISS. (mg/1) 720 870 MANGANESE, TOTAL <mg/1) 1.6 MANGANESE, DISS. (mg/1) 1.66 1.72 MERCURY, DISS. (µg/1) -0.1 -O.1 MOLYBDENUM, DI5S. (µg/1) 4 3 NICKEL, DISS. (µg/1) -20 20 NITROGEN, AMMONIA, DI5S. (mg/1) 1.23 0.29 NITROGEN, NITRATE, DISS. (mg/1) -0.02 0.06 NITROGEN, NITRITE, DISS. (mg/1> -0.01 -0.01 PH a 25 DEG C 7.5 8.4 PHOSPHATE AS P04, DISS. (mg/1> -0.1 POTASSIUM, DISS. (mg/1) 20 21 5ELENIUM, DISS. (µg/1) -10 -2 SILVER, TOTAL RECOVERABLE (µg/1) 50DIUM, DISS. (mg/1) 195 237 SAR 1.35 1.509 SULFATE, DISS. (mg/1) 3616 4281 SULFIDE, TOTAL (mg/1) - -0.02 0.21 ZINC, DISS. (µg/1) 20 40 CATIONJANION BALANCE (%) 0.93 0.91 TOTAL DISSOLVED SOLIDS a 180 DEG (mg/1) 5924 6910 TOTAL DISSOLVED SOLIDS, CALCULATED <mg/1) 5327 6225 TOTAL SUSPENDED SOLIDS, (mg/1) -2 LITHIUM, DISS. (mg/1) 0.63 COBALT, DISS. (mg/1) -0.02 BERYLLIUM, DISS. (mg/1) -0.005 VANADIUM, DISS. (mg/1) -0.01 C-2