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Laboratories, Inc. <br />2773 Downhill Drive Steamboat Sorinos. CO 80487!8001 334-5493 <br />Field Data <br />Conductivity (Field) Field Measurement 501 umhos/cm 04/12/06 10:15 jm <br />pH (Field) Field Measurement 7.9 untts 04/12/06 10:15 jm <br />Temperature (Field) Field Measurement 11.2 C 04/12/06 10:15 jm <br />Mctals Analysis <br /> <br />Calcium, dissolved M200.7 ICP 32.7 mg/L 0.2 1 04/20/06 17:49 jjc <br />Iron, dissolved M200.7 ICP 0.10 mg/L 0.02 0.05 04/20/06 17:49 jjc <br />Magnesium, dissolved M200.7 ICP 16.0 mg/L 0.2 1 04/20/06 17:49 jjc <br />Manganese, dissolved M200.7 ICP 0.013 B mg/L 0.005 0.03 04/19/06 19:24 jjc <br />Potassium, dissolved M200.7 ICP 1.6 mg/L 0.3 1 04/19/06 19:24 jjc <br />Sodium, dissolved M200.7.ICP 49.0 mg/L 0.3 1 04/20106 17:49 jjc <br />Wet Chemistry <br /> • • r •• r. <br />Alkalinity as CaC03 SM23206 -Titration <br />Bicarbonate as 184 mg/L 2 20 04/13/06 0:00 jtt <br />CaC03 <br />Carbonate as CaC03 U mg/L 2 20 04/13/06 0:00 jtt <br />Hydroxide as CaC03 U mg/L 2 20 04/13/06 0:00 jlf <br />Total Alkalinity 184 mg/L 2 20 04/13/06 0:00 jlf <br />Cation-Anion Balance Calculation <br />Cation-Anion Balance -1.0 % 04/25/06 10:15 talc <br />Sum of Minns 5.2 meq/L 0.1 0.5 04/25/06 10:15 talc <br />Sum of Cations 5.1 meq/L 0.1 0.5 04/25/06 10:15 talc <br />Chloride M325.2-Colorimefric 4 B mg/L 1 5 04/1810612:19 rips <br />Hardness as CaC03 SM23406 -Calculation 148 mg/L 1 7 04/25/06 10:15 talc <br />Lab Filtration SM 3030 B 04/16106 10:03 rips <br />Lab Filtration & SM 3030 B 04/18/06 9:04 erf <br />Acidification <br />Nitrate as N, dissolved Calculation: N03N02 minus N02 0.19 mg/L 0.02 0.1 04/25/Ofi 10:15 talc <br />NitratelNiMte as N. M353.2 -Automated Cadmium 0.19 mg/L 0.02 0.1 04!13/06 18:32 pjb <br />dissolved Reduction <br />Nitrite as N, dissolved M353.2 -Automated Cadmium U mg/L 0.01 0.05 04/13106 18:32 pjb <br /> Reduction <br />Residue, Filterable M160.1 - Gravimetric 340 mg/L 10 20 04/18106 15:09 jlt <br />(TDS) @1 BOC <br />Sodium Absorption USGS - 11738-78 1.78 0.03 0.15 04/25/Ofi 10:15 talc <br />Ratio in Water <br />Sulfate SM4500 504-D 70 mg/L 10 50 04/18/06 17:59 jtt <br />TDS (calculated) Calculation 285 mg/L 10 50 04/25/06 10:15 talc <br />TDS (ratio - Calculation 7.19 04/25106 10:15 talc <br />measured/calculated) <br />REPIN.02.06.05.01 • please refer to Extended Oualifier Report /or detail <br />L56030: Page 2 of 19 <br />Kerr Coal Company ACZ Sample ID: L56030-01 <br />Project ID: Date Sampled: 04/72/06 10:15 <br />Sample ID: AO-2A Date Received: 04/13/06 <br />Sample Matrix: Ground Water <br />