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ACZ Laboratories, Inc. <br />2773 Downhill Drive Steamboat Springs. CO 80487(800) 334-5493 <br />Kennecott Energy Co: Colowyo Coal Co. LP ACZ Sample ID: L47159-02 <br />Project ID: W67081 Date Sampled: 08!10/04 09:45 <br />Sample ID: LGSC Date Received: 08/11/04 <br /> Sample Matrix: Surface Water <br />Field Data <br /> •• .. <br />Conductivity (Field) Field Measurement 2090 umhos/cm 08/10/04 9:45 kb <br />Flow (Field) Field Measurement 1.26 cfs 08/10/04 9:45 kb <br />pH (Field) Field Measurement 7.9 units 08/10/04 9:45 kb <br />Temperature (Field) Field Measurement 12.3 C 08/10/04 9:45 kb <br />Metals Analysis <br /> r •• r. ~ I~ <br />Arsenic, total M200.8 ICP-MS 0.001 B mg/L 0.001 0.005 09/15/04 5:16 gjl <br />recoverable <br />Calcium, dissolved M200.71CP 151 mg/L Q2 1 08/11/0422:40 scp <br />Iron, total M200.7 ICP 0.48 mg/L 0.01 0.05 08/19/04 21:10 wfg <br />Lead, total recoverable M200.7 ICP U mg/L O.D4 0.2 08/20/04 2:41 wfg <br />Magnesium, dissolved M200.7 ICP 167 mg/L 0.2 1 08/11/04 22:40 scp <br />Manganese, total M200.71CP 0.240 mg/L 0.005 0.03 08/20/04 2:41 wfg <br />recoverable <br />Mercury, total M245.1 CVAA U mg/L 0.0002 0.001 08/26/04 17:25 jjc <br />Selenium, total SM 3114 B, AA-Hyddde 0.003 B mg/L 0.001 0.005 08/12/04 16:20 jjc <br />recoverable <br />Sodium, total M200.7 IGP 104 mg/L 0.3 1 08/20/04 2:41 wtg <br />recoverable <br />Zinc, total recoverable M200.7 ICP U mglL 0.01 0.05 OBI20l04 2:41 wfg <br />Metals Prep <br />Total Hot Plate M200.2 IGP 08/16/04 8:28 wfg <br />Digestion <br />Total Recoverable M200.2 ICP-MS 08/31/04 16:21 gjUak <br />Digestion <br />Total Recoverable M200.2 ICP 08/19/04 8:40 wfg <br />Digestion <br />REPIN.01.11.00.01 <br />' Please refer to Extended Qualifier Report for detail. <br />L47159: Page 4 of 23 <br />