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ENERGY Trust our People.Trust our Data. Billings,MT 800.735.4489•Casper,WY 888.235.0515 <br /> Gillette,WY 866.686.7175•Helena,MT 817.412.0711 <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 09:40 <br /> Lab ID: C17120211-010 DateReceived: 12/07/17 <br /> Client Sample ID: MW-19 Matrix: Aqueous <br /> MCL/ <br /> Analyses Result Units Qualifiers RL QCL Method Analysis Date/By <br /> NUTRIENTS <br /> Nitrogen,Nitrate+Nitrite as N 0 73 mg/L 0.01 E353.2 12/11/17 16 28/41 <br /> Phosphorus,Total as P 0.118 mg/L 0.005 E365.1 12/13/17 1506/IP <br /> METALS,DISSOLVED <br /> Aluminum ND mg/L 0.2 E200 8 12/13/17 20.37/eli-b <br /> Antimony ND mg/L 0 001 E200 8 12/12/17 17 29/eli-b <br /> Molybdenum 0 041 mg/L 0.005 E200.8 12/12/17 17.29/eli-b <br /> Thallium ND mg/L 0.0002 E200.8 12/12/17 17.29/eli-b <br /> Uranium 1 31 mg/L 0 0002 E200 8 12/13/17 20.37/eli-b <br /> METALS,TOTAL <br /> Aluminum 3 7 mg/L 0 2 E200 8 12/13/17 18:57/eli-b <br /> Antimony ND mg/L 0 001 E200 8 12/13/17 18 57/eli-b <br /> Arsenic ND mg/L 0 001 E200 8 12/13/17 18 57/eli-b <br /> Mercury ND mg/L 0.0001 E245.1 12/12/17 15 25/eli-b <br /> Thallium ND mg/L 0.0002 E200 8 12/13/17 18 57/eli-b <br /> RADIONUCLIDES,DISSOLVED <br /> Radium 226 1.7 pCi/L E903 0 12/28/17 08:33/arh <br /> Radium 226 precision(±) 0 4 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 717 pCi/L E900 0 12/18/17 23 20/cnh <br /> Gross Alpha precision(±) 140 pCi/L E900 0 12/18/17 23 20/cnh <br /> Gross Alpha MDC 5 5 pCi/L E900.0 12/18/17 2320/cnh <br /> Gross Beta 163 pCi/L E900 0 12/18/17 23:20/cnh <br /> Gross Beta precision(±) 17.5 pCi/L E900.0 12/18/17 2320/cnh <br /> Gross Beta MDC 10.3 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 15 of 38 <br />