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wwmenergylab.cmn Helena, MT 877-472-0711 • (fillings, MT 800-735-4489 • Casper, WY 888-235-0515 <br />,; - Anrtyrfal EreeilanraSMee 1951 I Gillette, WY 866-686-7175 • Rapid City, SD 888-612-1225 • College Station, Tx 888-690-2218 <br />LABORATORY ANALYTICAL REPORT <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 01/24/11 <br />Project: Schwartzwalder Water Sampling Program Discharge Collection Date: 12/07/10 <br />Lab ID: C10120395-001 DateReceived: 12/10/10 <br />Client Sample ID: DIS-001A (S25501) Matrix: Aqueous <br />MCL/ <br />Analyses Result Units Qualifiers RL QCL Method Analysis Date / By <br />MAJOR IONS <br />Chloride 43 mg/L 3 E300.0 12/14/10 12:20 / Ijl <br />Fluoride 0.3 mg/L 0.1 A4500-F C 12/16/10 09:38 / jba <br />Sulfate 163 mg/L 5 E300.0 12/14/10 12:20 / Ijl <br />NON-METALS <br />Cyanide, Weak Acid Dissociable ND mg/L 0.002 D2036 12/14/10 14:38 / eli-b <br />Sulfide ND mg/L 5 A4500-S F 12/10/10 14:27 / jba <br />PHYSICAL PROPERTIES <br />Oxygen Demand, Chemical (COD) ND mg/L 5 HACH 8000 12/14/10 13:21 / jba <br />Solids, Total Dissolved TDS @ 180 C 455 mg/L 10 A2540 C 12/13/10 13:14 / Ir <br />Solids, Total Suspended TSS @ 105 C ND mg/L 4 A2540 D 12/13/10 16:52 / Ir <br />METALS - DISSOLVED <br />Chromium ND mg/L 0.01 E200.7 12/22/10 18:26 / cp <br />Chromium, Hexavalent ND mg/L H 0.01 A3500 Cr-B 12/10/10 14:45 / jba <br />Chromium, Trivalent ND mg/L 0.01 Calculation 01/04/11 11:20 / bal <br />Iron ND mg/L 0.03 E200.7 12/22/10 18:26 / cp <br />Manganese ND mg/L 0.005 E200.7 12/22/10 18:26 / cp <br />- The sample was received past the EPA-recommended holding time for Hexavalent Chromium. <br />METALS-TOTAL <br />Antimony ND mg/L 0.001 E200.8 01/14/11 21:32 / sml <br />Arsenic ND mg/L 0.0005 E200.8 01/14/11 21:32 / sml <br />Boron ND mg/L 0.1 E200.8 01/14/11 21:32 / smi <br />Iron ND mg/L 0.03 E200.8 01/14/11 21:32 / sml <br />Mercury ND mg/L 0.0001 E245.1 12/15/10 08:30 / rdw <br />Thallium 0.0009 mg/L 0.0002 E200.8 01/14/11 21:32 / sml <br />Uranium ND mg/L 0.0002 E200.8 01/14/11 21:32 / sml <br />METALS - POTENTIALLY DISSOLVED <br />Arsenic ND mg/L 0.0005 E200.8 01/15/11 00:57 / sml <br />Cadmium ND mg/L 0.01 E200.8 01/15/11 00:57 / sml <br />Copper ND mg/L 0.001 E200.8 01/15/11 00:57 / sml <br />Nickel ND mg/L 0.05 E200.8 01/15/11 00:57 / sml <br />Selenium ND mg/L 0.001 E200.8 01/15/11 00:57 / sml <br />Silver ND mg/L L 0.00008 E200.8 01/15/11 00:57 / sml <br />Uranium 0.0004 mg/L 0.0002 E200.8 01/15/11 00:57 / sml <br />Zinc 0.016 mg/L 0.005 E200.8 01/17/11 14:34 / smi <br />Report RL - Analyte reporting limit. MCL - Maximum contaminant level. <br />Definitions: QCL - Quality control limit. ND - Not detected at the reporting limit. <br />H - Analysis performed past recommen ded holding time. L - Lowest available reporting limit for the analytical methoc <br /> used. <br />Page 3 of 22