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Laboratories, Inc. <br />2773 Downhill Drive Steamboat Springs, CO 80487 (800) 334-5493 <br /> <br />Lorencito Coal Company <br />Project ID: <br />Sample ID: MWLC-2 <br />ACZ Sample ID: L67204-05 <br />Date Sampled: 01112108 12.15 <br />Date Received: 01115108 <br />Sample Matrix: Ground Water <br />Inorganic Prep <br />Total Hot Plate M200.21CP 01/17/0819:09 nek <br />Digestion <br />Total Recoverable M200.21CP 01/17/08 20.21 nek <br />Digestion <br />Metals Analysis <br />r A r a Ssc F ?li, Lalax? ! Jib <br /> g . _ <br />Calcium, dissolved M200.71CP 64.1 m91L 02 1 01/170121:44 djt <br />Iron, total M200.7 ICP 324 mg/L 0.02 0.05 01/19/0818:10 erf <br />Iron, total recoverable M200.7 ICP 2.33 ' mg/L 0.02 0.05 01/1810815:02 erf <br />Magnesium, dissolved M200.7 ICP 22.8 mg/L 0.2 1 01/17/08 21:44 djt <br />Manganese, dissolved M200.71CP U mg/L 0.005 0.03 01/17/08 21:44 djt <br />Manganese, total M200.7 ICP 0.037 mg/L 0.005 0.03 01/22108 22:28 erf <br />Potassium, dissolved M200.7 ICP 2.0 mg/L 0.3 2 01/17/08 21.44 djt <br />Sodium, dissolved M200.71CP 106 mg/L 0.3 2 01/17/0821-44 It <br />Wet Chemistry <br /> <br />Alkalinity as CaC03 SM2320B - Titration ^ <br />Bicarbonate as 330 mg/L 2 20 01/16/08 0:00 Icp <br />GaC03 <br />Carbonate as CaC03 7 B mg/L 2 20 01/16/080:00 Icp <br />Hydroade as CaC03 U mg/L 2 20 01/16108 0:00 Icp <br />Total Alkalinity 337 mg/L 2 20 01/16/08 0:00 Icp <br />Cation-Anion Balance Calculation <br />Cation-Anion Balance 0.5 % 01/28/08 0:00 Cale <br />Sum of Anions 9.6 meq/L 0.1 0.5 01/28108 0.00 Cale <br />Sum of Cations 9.7 meq/L 01 0.5 01/28/08 0:00 Cale <br />Chloride 325.2 / SM45000I-E 60 mg/L 1 5 01/21/08 14:05 aml <br />Conductivity @25C 120.1 / SM2510B 880 umhos/cm 1 10 01/16/08 23:57 Icp <br />Hardness as CaCO3 SM2340B - Calculation 254 mg/L 1 7 01/28108 0:00 Cale <br />Lab Filtration & SM 3030 B 01/16108 9-40 wpl <br />Acidification <br />pH (lab) 150.1 / SM4500H+ B <br />pH 8.3 H units 0.1 0.1 01/16/08 0:00 IcP <br />pH measured at 23.0 C 0.1 0.1 01116108 0:00 Icp <br />Residue, Filterable 160.1 / SM2540C 510 mg/L 10 20 01/1510815:16 cas <br />am) @180C <br />Sodium Absorption USGS -11738-78 2.93 0.03 0.15 01/28108 0:00 talc <br />Ratio in Water <br />Sulfate 375.4 - Turbidimetric 56 ' mg/L 5 30 01/24/0814:27 ami <br />TDS (calculated) Calculation 516 mg/L 10 50 01/28/080:00 Cale <br />TDS (ratio - Calculation 0.99 01/28/08 0:00 Cale <br />measured/calculated) <br />• <br />REPIN.02.06.05.01 ' Please refer to Qualifier Reports for details. <br />L67204: Page 10 of 20