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GW N9 <br />CONTENTS: MONTHLY WATER DEPTHS, HYDROGRAPH <br />and QUARTERLY TESTING RESULTS <br />Monitoring Well GW-N9 <br />Zone Overburden & Dakota Coal <br />Northing: 607,834.00 <br />Easting: 1,114,888.00 <br />Elevation: 5,764.00 <br />Well Depth: 72.5 <br />Date of Collection 10-Oct-07 15-Nov-07 12-Dec-07 16-Jan-08 21-Feb-08 20-Mar-08 14-Apr-08 8-May-08 11-Jun-08 21-Jul-08 19-Aug-08 23-Sep-08 <br />FIELD PARAMETERS <br />PH 6.69 <br />Water Temperature (deg C) 15.00 <br />Conductivity (umhos/cm) 2,790 <br />Depth 36.60 41.35 <br />Depth (elev) 5727.4 5722.7 <br />LABORATORY PARAMETERS <br />Metals Analysis <br />Aluminum, dissolved .04(8) <br />Calcium, dissolved 577 <br />Iron, dissolved 0.2 <br />Lead, dissolved U <br />Magnesium, dissolved 150 <br />Manganese, dissolved 1.34 <br />Molybdenum, dissolved .02(B) <br />Potassium, dissolved 5 <br />Selenium, dissolved U <br />Sodium, dissolved 14.5 <br />Wet Chemistry <br />Bicarbonate as CaC03 288 <br />Carbonate as CaC03 U <br />Hydmxide as CaC03 U <br />Total Alkalinity 288 <br />Cation-Anion Balance 1.8 <br />Sum of Anions 40.5 <br />Sum of Cations 42 <br />Chloride 4(B) <br />Conductivity @25C 2640 <br />rdness as CaCO3 2060 <br />ate as N, dissolved <br />O .02(8) <br />atetNitrite as N. dissolve .02(8) <br />rdrite as N, dissolved U <br />Nitrogen, ammonia .14(B) <br />PH (lab) 7.7(H) <br />Phosphate .06(B) <br />Phosphorus, ortho dissolved .02(B) <br />Residue, Filterable (TDS) @180 2710 <br />Sodium Absorption Ratio in Wat .14(B) <br />Sulfate 1650 <br />TDS (calculated) 2580 <br />TOS (rata - measured/calculat 1.05 <br />1. Negative (-) =1eaa than <br />2. U =rot M-fe ,f M (Mnwaum note 6. L-0 <br />7. H-ExceeCedhoW G"me <br />I. B ? AnaMe cmcenfrah"on JatecteC ar a value behveen MUL a,M PoL <br />11 5,718 <br />6.70 6.44 6.74 <br />14.40 15.00 15.70 <br />3,390 3,340 2,700 <br />36.48 41.95 44.97 41.25 43.54 45.82 34.02 32.40 31.77 34.68 <br />5727.5 5722.1 5719.0 5722.8 5720.5 5718.2 5730.0 5,731.60 5732.2 5,729.32 <br /> MDL'S Units <br />.04(B) U U 0.06 mgt. <br />520 562 563 0.4 mgt. <br />2.32 0.18 0.18 0.04 WE <br />U U U 0.0001 mWL <br />260 253 127 0.4 VL <br />1.39 1.33 1.17 0.005 mqt <br />U U U 0.02 mgt <br />11.3 8.5 3.8 0.6 mgt. <br />U U U 0.0001 mWt <br />52.2 34.6 12.5 6 m t <br />365 349 267 2 mgt <br />U U U 2 mgt <br />U U U 2 ,WL <br />365 349 267 2 mgt <br />2.8 -0.6 2.2 % <br />47.5 51.3 37.6 0.1 meg1L <br />50.2 50.7 39.3 0.1 meyl <br />11 9 5(B) 1 mgt <br />3370 3390 2740 1 umh-s cn <br />2370 2440 1930 1 mgt <br />U .08(B) 0.1 0.02 mgt. <br />HU .08(B) .1(HB) 0.02 mgt <br />HU U HU 0.01 mgt. <br />0.7 .33(B) U 0.05 VL <br />8(H) 7.4(H) 7.8(H) 0.1 <br />.03(B) .03(B) .06(B) 0.03 mgt <br />.01(HB) .01(B) .02(HB) 0.01 mgt <br />3410 3410 2670 10 mgt <br />0.47 0.3 .12(B) 0.03 mgt <br />19W 2100 1530 10 mgt <br />2980 3180 2400 10 .0 <br />1.14 1.07 1.11 <br />Monitoring Well GW-N9 <br />Current Water Year Data <br />5 <br />734 <br />, <br />5,732 _____________________________________________________________________________________________________________________________________ <br />5,730 ________________________________________________________________________________________________________________ <br />5.728 - ----------------- _------------------------------------------------------------- _------------------------------- <br />wat« <br />Elevation 5,726 --------- __________________ _______ _ <br />(e) <br />5,724 _______________ _________________________ <br />5,722 ______________________________________________ <br />5,720 ______________________________________________________ <br /> <br /> <br />00-07 Dec-07 Feb-08 Apr-08 Jun-08 Aug-08 <br />Month <br />F:\Eng\DATA\excelhwaten2008\2008_ANUHYD