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nwwprorgylabcom a1? 4VB77=472-0711 -Billings, MT 000-735-4469 a Casper, WY 888-235-0515 <br />AatF,zMYrwsaautASt ;1.175'! taped C ite; SD 81B-672-1225 - Coll ege Station, TX 888-690-2216 <br /> LABORATORY ANALYTICAL REPORT <br /> Prep ared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 12/28/10 <br />Project: Schwartzwalder Mine Monitoring Program-Discharge Collection Date: 11/22/10 <br />Lab ID: C1 0110835-001 DateReceived: 11/23/10 <br />Client Sample ID: DIS-001A (S25476) Matrix: Aqueous <br /> MCU <br />Analyses Result Units Qualifiers RL QCL Method Analysis Date / By <br />MAJOR IONS <br />Chloride 43 mg/L 3 E300.0 11/24/10 11:05 / Ijl <br />Fluoride 0.3 mg1L 0.1 A4500-F C 12/01/10 09:04 / jba <br />Sulfate 235 mg/L 5 E300.0 11/24/10 11:05 / Ijl <br />NON-METALS <br />Cyanide, Weak Acid Dissociable 0.002 mg/L 0.002 D2036 11/30/10 15:12 / eli-b <br />Sulfide ND mg/L 5 A4500-S F 11/23/10 13:22 / jba <br />PHYSICAL PROPERTIES <br />Oxygen Demand, Chemical (COD) 20 mg/L 5 HACH 8000 12/02/10 09:51 / jba <br />Solids, Total Dissolved TDS @ 180 C 551 mg/L 10 A2540 C 11/23/10 16:43 / Ir <br />Solids, Total Suspended TSS @ 105 C ND mg/L 4 A2540 D 11/24/10 09:131 Ir <br />METALS - DISSOLVED <br />Chromium ND mg/L 0.001 E200.8 12/22/10 11:37 / sml <br />Chromium, Hexavalent ND mg/L D 0.01 A3500 Cr-B 11/23/10 14:29 /jba <br />Chromium, Trivalent ND mg/L D 0.01 Calculation 12/15/10 10:57 / sec <br />Iron ND mg/L 0.03 E200.7 12/08/10 11:10 / cp <br />Manganese ND mg/L 0.005 E200.7 12/08/10 11:10 / cp <br />METALS - TOTAL <br />Antimony ND mg/L 0.001 E200.8 12/14/10 03:41 / sml <br />Arsenic 0.0007 mg/L 0.0005 E200.8 12/14/10 03:41 / sml <br />Boron ND mg/L 0.1 E200.8 12/14/10 03:41 / smI <br />Iron ND mg/L 0.03 E200.7 12/08/10 14:27 / cp <br />Mercury ND mg/L 0.0001 E245.1 11/30/10 13:15 / rdw <br />Thallium ND mg/L 0.0002 E200.8 12/14/10 03:41 / sml <br />Uranium 0.0011 mg/L 0.0002 E200.8 12/14/10 03:41 / sml <br />METALS - POTENTIALLY DISSOLVED <br />Arsenic ND mg/L 0.0005 E200.8 12/14/10 08:37 / sml <br />Cadmium ND mg/L 0.01 E200.8 12/14/10 08:37 / sml <br />Copper 0.001 mg/L 0.001 E200.8 12/14/10 08:37 / sml <br />Nickel ND mg/L 0.05 E200.8 12/14/10 08:37 / smi <br />Selenium ND mg/L 0.001 E200.8 12/14/10 08:37 / sml <br />Silver ND mg/L L 0.0002 E200.8 12/21/10 06:35 / sml <br />Uranium ND mg/L 0.0002 E200.8 12/14/10 08:37 / sml <br />Zinc 0.027 mg/L 0.005 E200.8 12/14/10 08:37 / sml <br />RADIONUCLIDES - DISSOLVED <br />Radium 226 1.0 pCi/L E903.0 12/27/10 10:15 / trs <br />Radium 226 precision (±) 0.19 pCi/L E903.0 12/27/10 10:15 / trs <br />Radium 226 MDC 0.11 pCi/L E903.0 12/27/10 10:15 / trs <br />Report RL - Analyte reporting limit. MCL - Maximum contaminant level. <br />Definitions: QCL - Quality control limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration D - RL increased due to sample matrix. <br />L - Lowest available reporti ng limit for t he analytical method <br />used. Page 3 of 23