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AOZ Laboratories, Inc. <br />2773 Downhill Drive Steamboat Springs, CO 80487(800) 334-5493 <br />Kerr Coal Company <br />Project ID: <br />Sample ID: 79-61 <br />t_ a _J- <br />ACZ Sample ID: L59598-04 <br />Date Sampled: .10124106 09:20 <br />Date Received: 10124106 <br />Sample Matrix: Ground Water <br />Field Data <br />Conductivity (Field) Field Measurement 1640 ms/cm 10/24/06 9:20 jm <br />pH (Field) Field Measurement 7.9 units 10/24/06 9:20 jm <br />Temperature (Field) Field Measurement 8.0 C 10/24/06 9:20 jm <br />Metals Analysis <br />7 17 <br />Calcium, dissolved M200.7 ICP 49 mg/L 1 5 11/02/06 18:14 !gme <br />Iron, dissolved M200.7 ICP U mg/L 0.1 0.3 11/02/06 18:14 igme <br />Magnesium, dissolved M200.7 ICP 12 mg/L 1 5 11/02/06 18:14 ,gme <br />Manganese, dissolved M200.7 ICP U mg/L 0.03 0.1 11/02/06 18:14 gme <br />Potassium, dissolved M200.7 ICP 3 B mg/L 2 5 11/02/06 18:14 1gme <br />Sodium, dissolved M200.7 ICP 192 mg/L 2 5 11/02/06 18:14 ?gme <br />Wet Chemistry <br />I <br /> <br />Alkalinity as CaC03 SM2320B - Titration <br />Bicarbonate as 483 mg/L 2 20 11/06/06 0:00 ct <br />CaC03 <br />Carbonate as CaC03 30 mg/L 2 20 11/06/06 0:00 ct <br />Hydroxide as CaC03 U mg/L 2 20 11/06/06 0:00 ct <br />Total Alkalinity 513 mg/L 2 20 11106/06 0:00 1 ct <br />Cation-Anion Balance Calculation <br />Cation-Anion Balance -4.0 % 11/23/06 10:33 calc <br />Sum of Anions 13.0 meq/L 0.1 0.5 11/23106 10:33 calc <br />Sum of Cations 12.0 meq/L 0.1 0.5 11/23/06 10:33 :calc <br />Chloride M325.2 - Colorimetric 17 mg/L 1 5 11/02/06 19:54 I pjb <br />Hardness as CaC03 SM2340B - Calculation 172 mg/L 1 7 11123/06 10:33 ?calc <br />Lab Filtration SM 3030 B 10/25/06 11:41 Izg/mis <br />Lab Filtration & SM 3030 B 10/26/06 10:00 mis <br />Acidification <br />Nitrate as N, dissolved Calculation: N03NO2 minus N02 U mg/L 0.02 0.1 11/23/06 10:33 icalc <br />Nitrate/Nitrite as N, M353.2 - Automated Cadmium U mg/L 0.02 0.1 10/24/06 20:18 pjb <br />dissolved Reduction <br />Nitrite as N, dissolved M353.2 - Automated Cadmium 0.02 B mg/L 0.01 0.05 10/24/06 20:18 pjb <br /> Reduction <br />Residue, Filterable M160.1 - Gravimetric 660 mg/L 10 20 10/31/06 10:12 Icp <br />(TDS) @180C <br />Sodium Absorption USGS - 11738-78 6.45 0.03 0.15 11/23/06 10:33 'calc <br />Ratio in Water <br />Sulfate - SM4500 S04-D 110 mg/L 10 50 11/10/06 11:42 Icp <br />TDS (calculated) Calculation 703 mg/L 10 50 11/23/06 10:33 'calc <br />TDS (ratio - . Calculation 0.94 11/23/06 10:33 1calc <br />measured/calculated) <br />REPIN.02.06.05.01 * Please refer to Qualifier Reports for detail, <br />L59598: Page 5 of 17