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ACZ Laboratories, Inc. <br />2773 Downhill Drive Steamboat Sorinds. CO 80487!8001 334-5493 <br />Wet Chemistry <br /> <br />Alkalinity as CaC03 SM23206 -Titration <br />Bicarbonate as 440 mg/L 2 10 08/13/04 0:00 mah <br />CaC03 <br />Carbonate as CaC03 U mg/L 2 10 08/13/04 0:00 mah <br />Hydroxide as CaC03 U mg/L 2 10 08/13/04 0:00 mah <br />Total Alkalinity 440 mg/L 2 10 08/13/04 0:00 mah <br />Conductivity @25C M120.1 -Meter 1670 umhos/cm 1 10 06113/04 11:31 mah <br />Hardness as CaC03 SM23406 -Calculation 1020 mg/L 1 7 09/15/04 10:58 calc <br />Lab Filtration SM 3030 B 08/12/04 11:19 nlm <br />Lab Filtration & SM 3030 B 08/17/04 12:08 ak <br />Acidification <br />Nitrate as N, dissolved Calculation: N03N02 minus N02 5.5 mg/L 0.1 0.5 09/15/04 10:58 calc <br />Nitrate/Nitrite as N, M353.2 -Automated Cadmium 5.6 mg/L 0.1 0.5 08/11/04 15:36 erf <br />dissolved Reduction <br />Nitrite as N, dissolved M353.2 -Automated Cadmium 0.02 B mg/L 0.01 0.05 06/11/04 15:18 erf <br /> Reduction <br />Nitrogen, ammonia M350.1 -Automated Phenate U mg/L 0.05 0.5 08/17/04 0:26 jjr <br />pH (lab) M150.1 - Electrometric 7.6 H units 0.1 0.1 08/13/04 11:31 mah <br />Phosphorus, ortho M365.1 -Automated Ascorbic Acid 0.01 BH mg/L 0.01 0.05 08/13/04 9:19 ksj <br />dissolved <br />Phosphorus, total M365.1 -Auto Ascorbic Acid 0.02 B mg/L 0.01 0.05 08/24/04 16:51 ksj <br /> (digest) <br />Residue, Filterable M160.1 -Gravimetric 1510 mg/L 10 20 08/17/04 9:12 nlm <br />(TDS) @180C <br />Residue, Non- M160.2-Gravimetric U mg/L 5 20 08/17/048:17 nlm <br />Filterable (TSS) <br />@105C <br />Sulfate M375.3-Gravimetric 680 mg/L 10 50 08/24/0410:25 mah/jah <br />REPIN.01.11.00.01 <br />• Please rarer to Extended Quali/ier Report for detai/. <br />L47159: Page 7 of 23 <br />Kennecott Energy Co: Colowyo Coal Co. LP ACZ Sample ID: L47159-03 <br />Project ID: W67081 Date Sampled: 08/10/04 08:40 <br />Sample ID: NUGSC Date Received: 08/11/04 <br />Sample Matrix: Surface Water <br />