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CONTENTS: MONTHLY WATER DEPTHS DATING BACK TO MAY'93, HYDROGRAPH <br />and QUARTERLY TESTING RESULTS <br />MONITORING WELL GW -N37 <br />Zone DAKOTA COAL <br />Northing: 600022.19 <br />Easting: ,121,440.64 <br />Elevation: 5,752.03 <br />Well Depth: 44,70 <br />FIELD PARAMETERS <br />16.4 <br />pH Dry Dry Dry Dry Dry Dry Dry 5.18 4.56 <br />Water Temperature (deg C) 11.9 13.9 <br />Conductivity (umhos /cm) 407 488 <br />Depth to water (ft) Dry Dry Dry Dry Dry Dry Dry 11.51 8.49 9,78 13.75 13.56 <br />Water Elevation (ft) #VALUEI #VALUE! #VALUE! #VALUE! #VALUE! #VALUE! #VALUE! 5,740.52 5,743.54 5,742.25 5,738.28 5,738.47 <br />LABORATORY PARAMETERS <br />Metals Analysis <br />Aluminum, dissolved <br />Calcium, dissolved <br />Iron, dissolved <br />Iron, Total Recoverable <br />Lead, dissolved <br />Magnesium, dissolved <br />Manganese, dissolved <br />Manganese, Total <br />Molybdenum, dissolved <br />Potassium, dissolved <br />Selenium, dissolved <br />Sodium, dissolved <br />Wet Chemistry <br />Bicarbonate as CaCO3 (mg /L) <br />Carbonate as CaCO3 (mg /L) <br />Hydroxide as CaCO3 (mg /L) <br />Total Alkalinity <br />Cation -Anion Balance (%) <br />Sum of Anions (meq /L) <br />Sum of Cations (meq /L) <br />Chloride, dissolved (mg /L) <br />Conductivity @ 25C (um hos /cm) <br />Hardness as CaCO3 (mg /L) <br />Nitrate as N (mg /L) <br />Nitrate/Nitrite as N (mg /L) <br />Nitrite as N (mg /L) <br />Nitrogen, ammonia (mg /L) <br />pH @ 25C <br />Phosphate as PO4 (mg /L) <br />Phosphorus (mg /L) <br />Resdue, Filterable @180 (TDS) <br />Sodium Absorption Ratio in Water <br />Sulfate, dissolved (mg /L) <br />Total Dissolved Solids @ 180C (mg /L) <br />Total Dissolved Solids, calculated (mg /L) <br />1. Negative ( -I = less Than <br />2. U = not defected of MDL (Minimum Detection Level) <br />3. H - Exceeded hold lime <br />4 8 - a....r ...................... <br />CORRECTION: RLG 12 -20 -05 <br />• <br />19- Oct -10 22- Nov -10 13- Dec -10 18-Jan -11 15- Feb -11 8- Mar -11 14- Apr -11 10- May -11 21- Jun -11 15- Jul -11 16- Aug -11 13- Sep -11 <br />F: \Eng \ DATA \excel l \water \2011(201 1 _A N U HYD <br />MDL'S Units <br />0.06 mail_ <br />0.66 1.03 0.4 mail <br />42.2 51.8 0.04 mail, <br />0.04(8) 0.03(B) 1E -04 mgt <br />4.6 3.32 0.02 mail <br />0.0006 0.001 0.4 mail <br />18.4 22.1 0.005 mail <br />0.028(B) 0.036 0.005 mgt <br />0.042 0.54 0.02 mgt <br />U U 0.6 mail <br />2.4 1.9(B) 1E -04 mga <br />0.0018 0.0019 6 mail <br />14.4 15.5 <br />U <br />4(B) <br />-2.3 <br />4.5 <br />4.3 <br />10 <br />453 <br />181 <br />0.45 <br />0.49 <br />0.04(B) <br />U <br />5.5(H) <br />0.03(B) <br />0.01(B) <br />360 <br />0.47 <br />196 <br />289 <br />1.25 <br />2 mgt <br />4(8) U 2 mgt <br />U U 2 mgt <br />U 2 mgt <br />U <br />5.1 0.1 meq /L <br />4.7 0.1 meq/L <br />5.2 1 mgi <br />11 1 umhos/c <br />512 1 mgt <br />220 0.02 mgt <br />0.17 0.02 mgt <br />0.17 0.01 mgt <br />U <br />U <br />5.0(H) <br />0.09(B) <br />0.03(6) <br />400 <br />0.46 <br />210 <br />314 <br />1.27 <br />0.05 mgt <br />a. 1 <br />0.03 mgt <br />0.01 mgt <br />10 mgt <br />0.03 mail <br />10 mgt <br />10 mgt <br />water <br />Elevation <br />(ft) <br />5,745 <br />5.744 <br />5,743 <br />5,742 <br />5,741 <br />5,740 <br />5,739 <br />5,738 <br />5,737 - <br />5,736 - <br />5,735 <br />Monitoring Well GW -N37 <br />Current Water Year Data <br />Oct -10 Nov -10 Dec-10 Jan -11 Feb -11 Mar -11 Apr -11 May -11 Jun -11 Jul -11 Aug -11 Sep -11 <br />Month <br />