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ANNUAL TESTING <br />• GROUND WATER QUALITY PARAMETERS <br />SITE: GW-N4 <br />FORMATION: DAKOTA COAL <br />DATE OF COLLECTION 16-Aug-00 <br />FIELD PARAMETERS <br />pH 6.65 <br />Water Temperature (deg C) <br />Conductivity (umhos/cm) 5940 <br />LABORATORY PARAMETERS <br /> Metals Analysis <br /> Aluminum, dissolved (mg/L) U <br /> Calcium, dissolved (mg/L) 447 <br /> Iron, dissolved (mg/L) U <br /> Lead, dissolved (mg/L) U <br /> Magnesium, dissolved (mg/L) 856 <br /> Manganese, dissolved (mg/L) 2.15 <br /> Molybdenum, dissolved (mglL) U <br /> Potassium (mg/L) 20 <br /> Selenium, dissolved (mg/L) U <br />• Sodium, dissolved (mg/L) 228 <br /> Wet Chemistry <br /> Alkalinity as CaCO3 <br /> Bicarbonate as CaCO3 (mg/L) 569 <br /> Carbonate as CaCO3 (mglL) U <br /> Hydroxide as CaCO3 (mg/L) U <br /> Total Alkalinity 569 <br /> Cation-Anion Balance <br /> Cation-Anion Balance (%) -1.9 <br /> Sum of Anions (meq/L) 107 <br /> Sum of Cations (meg1L) 103 <br /> Chloride, dissolved (mg/L) 38 <br /> Conductivity @ 25C (umhos/cm) 5780 <br /> Hardness as CaCO3 (mg1L) 4640 <br /> Nitrate as N (mg/L) U <br /> Nitrate/Nitrite as N (mg/L) U <br /> Nitrite as N (mg/L) U <br /> Nitrogen, ammonia (mg/L) 0.19 <br /> pH @ 25C 6.7 <br /> Phosphate as PO4 (mg/L) <br /> Phosphorus (mg/L) 0.011 <br /> Sodium Absorption Ratio in Water 1'.46 <br /> Sulfate, dissolved (mg/L) 4500 <br /> Total Dissolved Solids @ 180C (mg/L) 6790 <br /> Total Dissolved Solids, calculated (mg1L) 6430 <br />• 1 Negative (-) =less than <br /> 2. U =not detected at MDL (Minimum Detection Level) <br />^_:\data \gpro\wa ter\99\99armhyd. wb3 <br />