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ENERGY (4 Trust our People.Trust our Data. / Billings,MT 800.735.4489•Casper,WY 888.235.0515 <br /> Gillette,WY 866.686.7175•Helena,MT 817.472.0711 <br /> LABORATORY ANALYTICAL REPORT <br /> Prepared by Casper,WY Branch <br /> Client: Cotter Corporation Report Date: 01/08/18 <br /> Project: Schwartzwalder Mine Collection Date: 12/06/17 10:53 <br /> Lab ID: C17120211-011 DateReceived: 12/07/17 <br /> Client Sample ID: MW1 Matrix: Aqueous <br /> MCL! <br /> Analyses Result Units Qualifiers RL QCL Method Analysis Date!By <br /> NUTRIENTS <br /> Nitrogen,Nitrate+Nitrite as N 0 53 mg/L 0 01 E353 2 12/11/17 16.29/1j1 <br /> Phosphorus,Total as P 0.011 mg/L 0 005 E365 1 12/13/17 15:08/IjI <br /> METALS, DISSOLVED <br /> Aluminum ND mg/L 0.2 E200 8 12/12/17 17.08/eli-b <br /> Antimony ND mg/L 0 001 E200 8 12/12/17 17 08/eli-b <br /> Molybdenum 0 017 mg/L 0 005 E200 8 12/13/17 2041 /eli-b <br /> Thallium ND mg/L 0 0002 E200.8 12/12/17 17:08/eli-b <br /> Uranium 1 16 mg/L 0 0002 E200 8 12/13/17 20 41/eli-b <br /> METALS,TOTAL <br /> Aluminum ND mg/L 0 2 E200 8 12/13/17 19 00/eli-b <br /> Antimony ND mg/L 0.001 E200 8 12/13/17 19 00/eli-b <br /> Arsenic ND mg/L 0 001 E200 8 12/13/17 19:00/eli-b <br /> Mercury ND mg/L 0 0001 E245.1 12/12/17 1527/eli-b <br /> Thallium ND mg/L 0 0002 E200.8 12/13/17 1900/eli-b <br /> RADIONUCLIDES, DISSOLVED <br /> Radium 226 0 5 pCi/L E903 0 12/28/17 08.33/arh <br /> Radium 226 precision(±) 0 2 pCi/L E903 0 12/28/17 08.33/arh <br /> Radium 226 MDC 0 1 pCi/L E903.0 12/28/17 08:33/arh <br /> RADIONUCLIDES,TOTAL <br /> Gross Alpha 662 pCi/L E900 0 12/18/17 23 20/cnh <br /> Gross Alpha precision(±) 129 pCi/L E900.0 12/18/17 23 20/cnh <br /> Gross Alpha MDC 5 0 pCi/L E900 0 12/18/17 23:20/cnh <br /> Gross Beta 193 pCi/L E900 0 12/18/17 23:20/cnh <br /> Gross Beta precision(±) 20.7 pCi/L E900.0 12/18/17 2320/cnh <br /> Gross Beta MDC 11 8 pCi/L E900.0 12/18/17 23.20/cnh <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 <br /> Page 16 of 38 <br />