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Laboratories, Inc. <br />2773 Downhill Drive Steamboat Springs, CO 80487 (800) 334-5493 <br />• Lorencito Coal Company ACZ Sample ID: L67204-06 <br />Project ID: Date Sampled: 0111210812:55 <br />Sample ID: MWLC-1 Date Received: 01115108 <br />Sample Matrix: Ground Water <br />Inorganic Prep _- <br />T <br />01/17/0819:24 nek <br />Total Hot Plate M200.2 ICP <br />Digestion <br />Total Recoverable M200.2 ICP 01/17/08 20:36 nek <br />Digestion <br />Metals Analysis <br />` <br />i " <br /> _ <br />e -- o . <br />?.. <br />Calaum, dissolved M200.71CP 46.6 mg/L 02 1 01/17/08 21:48 djt <br />Iron, total M200.7 ICP 8.00 M91L 0.02 0.05 01/19/0818:13 erf <br />Iron, total recoverable M200.7 ICP 4.11 mg/L 0.02 0.05 01/18/0815:05 erf <br />Magnesium, dissolved M200.7 ICP 18.8 mg/L 0.2 1 01/17/08 21:48 djt <br />Manganese, dissolved M200.7 ICP U mg/l- 0.005 0.03 01/17108 21:48 djt <br />Manganese, total M200.7 ICP 0.118 mg/L 0.005 0.03 01122108 22:32 erf <br />Potassium, dissolved M200.7 ICP 2.3 mg/L 0.3 2 01117/08 21:48 djt <br />Sodium, dissolved M200.7 ICP 161 mg/L 0.3 2 01/17/08 21:48 dit <br /> Wet Chemistry <br />T <br />_ <br /> <br /> Alkalinity as CaC03 SM2320B - Titration <br /> Bicarbonate as 370 mg/L 2 20 01117!08 000 Icp <br /> CaCO3 <br /> Carbonate as CaC03 14 B mg/L 2 20 01/17/08 0:00 Icp <br /> Hydroxide as CaCO3 U mg/L 2 20 01/17/08 0:00 Icp <br /> Total Alkalinity 384 mg/L 2 20 01/17/080,00 lcP <br /> Cation Anion Balance Calculation <br /> Cation-Anion Balance 0.9 % 01/28/08 0:00 calc <br /> Sum of Anions 10.8 meq/L 0.1 0.5 01/28/08 0:00 calc <br /> Sum of Cations 11.0 meq/L 0.1 0.5 01/28/08 0:00 calc <br /> Chloride 325.2 / SM45000I-E 77 mg/L 1 5 01/21/08 14:05 aml <br /> Conductivity @25C 120.11 SM2510B 1010 umhos/cm 1 10 01/17/08 0:06 lcP <br /> Hardness as CaC03 SM2340B - Calculation 194 m91L 1 7 01/28/08 0:00 caic <br /> Lab Filtration & SM 3030 B 01/16/08 9:42 wpi <br /> Acidification <br /> pH (lab) 150.1 / SM4500H+ B <br /> pH 8.4 H units 0.1 0.1 01/17/08 0:00 Icp <br /> pH measured at 23.0 C 0.1 0.1 01/17/080:00 Icp <br /> Residue, Filterable 160.1 / SM2540C 580 mg/L 10 20 01115/0815:18 cas <br /> (TDS) @180C <br /> Sodium Absorption USGS -11738-78 5.09 0.03 0.15 01/28/080:00 caic <br /> Ratio in Water <br /> Sulfate 375.4 - Turbidimetric 47 ' mg/L 5 30 01/24/0814:28 aml <br /> TDS (calculated) Calculation 589 mg/L 10 50 01/28/08 0:00 calc <br /> TDS (ratio - Calculation 0.98 0128108 0:00 calc <br /> measured/calculated) <br /> <br /> REPIN.02.06.05.01 ' Please refer to Qualifier Reports for details. <br />L67204: Page 11 of 20