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GROUND WATER QUALITY PARAMETERS SITE GW-N20 FORMATION DAKOTA COAL DATE OF COLLECTION 08/27/93 05/14/93 FIELD PARAMETERS Conductivity (UMHOS/CM) 1460 1325 pH 5.71 5.16 Water Temperature (DEG C) 17 17 LABORATORY PARAMETERS ACIDITY, DISS. (mg/I OF CAC03) 23 12 ALKALINITY, DISS. (mg/1 OF CAC03) Ib 4 ALUMINUM, DISS. (mg/1) 0.45 1.1 ARSENIC, DISS. fµg/1) 2 -1 BARIUM, DISS. (µg/1I 10 BICARBONATE, DISS. (mg/1 ) 16 5 BORON, DISS. (µg/1) 380 400 CADMIUM, DISS. (µg/1> -30 -5 CALCIUM, DISS. (mg/1) 299 272 CARBONATE, DISS. (mg/1) 0 O CHLORIDE, DISS. (mg/1) 16 6 CONDUCTIVITY a 25 DEG C (UMH05/CM> 2150 1740 COPPER, DISS. (µg/1) -20 -10 FLOURIDE, DISS. (mg/1) 0.8 0,9 HARDNESS AS CAC03 !mg/1) 1121 1008 IRON, DISS. (mg/1) 35.4 1.18 IRON, TOTAL (mg/1) 42.9 7.76 LEAD, DISS. (µg/1) -40 -20 MAGNESIUM, DISS. (mg/1) 91 80 MANGANESE, DISS. (mg/1) 1.78 1.77 MANGANESE, TOTAL (mq/1) 2.08 1.67 MERCURY, DI55. (µg/1) -0.2 -0.1 MOLYBDENUM, DISS. (µg/1> -1 -1 NICKEL, DISS, (µg/1) -40 40 NITROGEN, AMMONIA, DISS. (mg/1) 1.8 2.6 NITROGEN, NITRATE, DISS. (mg/1) -0.02 0.04 NITROGEN, NITRITE, DISS. (mg/1) -0.01 -0.01 PH a 25 DEG C 5.6 5.4 PHOSPHATE AS P04, DISS. (mgll) -0.1 POTASSIUM, DI55, (mg/1> 10 10 SELENIUM, DISS. (µg/1) -1 -1 SODIUM, DISS. (mg/1) 33 31 SODIUM ADSDRPTION RATIO 0,429 0.430 SULFATE, DISS. (mg/1) 1219 1107 SULFIDE, TOTAL (mg/1) 0.03 0.04 TOTAL SUSPENDED SOLIDS < mg/1) ZINC, DISS. (µg/1) 390 250 CATION/ANION BALANCE (%) -4.46 -3.78 TOTAL DISSOLVED SOLIDS a 190 DEG (mg/1) 1824 1544 TOTAL DISSOLVED SOLIDS, CALCULATED (mg/1) 1673 1498 LITHIUM, DISS. (mg/1) 0.46 0.44 COBAL7, DISS. (mg/1) 0.05 0.04 BERYLLIUM, DISS. lmg/1) 0.008 0.019 VANADIUM, DI55. (mg/1) -0.01 -0.01 C-11