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GROUND WATER QUALITY PARAMETERS <br />SITE: GW-N14 <br />• FORMATION: DAKOTA COAL <br />DATE OF COLLECTION 25-Fe1r97 07-Aug-97 <br />FIELD PARAMETERS <br />pH 4.3 4.2 <br />Water Temperature (deg C) 9.6 14.7 <br />Conductivity (umhos/cm) 2,700 3,100 <br />LABORATORY PARAMETERS <br />Metals Analysis <br />~ Wet Chemistry <br />Alkalinity as CaCO3 <br />• Bicarbonate as CaCO3 (mg/L) U U <br />Carbonate as CaCO3 (mg/L) U U <br />Total Alkalinity U U <br />Cation-Anion Balance <br />Cation-Anion Balance (%) 3.2 -4.3 <br />Sum of Anions (meq/L) 62.6 69.6 <br />Sum of Cations (meq/L) 66.8 63.8 <br />Chloride, dissolved (mg/L) 9 10 <br />Conductivity @ 25C (umhos/cm) 3790 3880 <br />Hardness as CaCO3 (mq/L) 2910 2770 <br />Nitrate as N (rnglL) U U' <br />Nitrate/Nitrite as N (mg/L) U U <br />Nitrite as N (mg/L) U U <br />Nitrogen, ammonia (mg/L) 1.29 1.4 <br />pH @ 25C 4.2 3.4 <br />Phosphate as PO4 (mg/L) U 0.1 <br />Total Dissolved Solids (i0, 180C (mg/L) 4150 4030 <br />Total Dissolved Solids, calculated (mg/L) 4040 4330 <br />Sodium Absorption Ratio in Water 0.56 0.55 <br />Sulfate, dissolved (mg/L) 2970 3300 <br />1. Negative (-) =less than <br />2. U =not defected at MDL (Minimum Detection Levep <br />• <br />Sodium, dissolved (mg/L) 68.9 66.8 <br />