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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 871.472.0711 <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: 12/04/17 11:44 <br /> Lab ID: C17120211-002 DateReceived: 12/07/17 <br /> Client Sample ID: MW-0 Matrix: Aqueous <br /> MCL/ <br /> Analyses Result Units Qualifiers RL QCL Method Analysis Date I By <br /> NUTRIENTS <br /> Nitrogen,Nitrate+Nitrite as N 0.37 mg/L 0 01 E353.2 12/11/17 16:19/Ijl <br /> Phosphorus,Total as P ND mg/L 0 005 E365.1 12/13/17 15:03/IjI <br /> METALS,DISSOLVED <br /> Aluminum ND mg/L 0.2 E200.8 12/12/17 16.34/eli-b <br /> Antimony ND mg/L 0 001 E200.8 12/12/17 16.34/eli-b <br /> Molybdenum 0.017 mg/L 0.005 E200 8 12/13/17 19 59/eli-b <br /> Thallium ND mg/L 0.0002 E200 8 12/12/17 1634/eli-b <br /> Uranium 0.715 mg/L 0 0002 E200 8 12/12/17 1634/eli-b <br /> METALS,TOTAL <br /> Aluminum ND mg/L 0.2 E200.8 12/13/17 18.12/eli-b <br /> Antimony ND mg/L 0 001 E200.8 12/13/17 18.12/eli-b <br /> Arsenic ND mg/L 0 001 E200 8 12/13/17 18 12/eli-b <br /> Mercury ND mg/L 0.0001 E245 1 12/12/17 15 16/eli-b <br /> Thallium ND mg/L 0.0002 E200 8 12/13/17 18.12/eli-b <br /> RADIONUCLIDES, DISSOLVED <br /> Radium 226 0.7 pCi/L E903.0 12/28/17 0616/arh <br /> Radium 226 precision(±) 0.2 pCi/L E903.0 12/28/17 06:16/arh <br /> Radium 226 MDC 0 1 pCi/L E903.0 12/28/17 06:16/arh <br /> RADIONUCLIDES,TOTAL <br /> Gross Alpha 478 pCi/L E900.0 12/18/17 23 20/cnh <br /> Gross Alpha precision(±) 93.8 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 82 5 pCi/L E900.0 12/18/17 23.20/cnh <br /> Gross Beta precision(±) 9 4 pCi/L E900 0 12/18/17 23:20/cnh <br /> Gross Beta MDC 8.9 pCi/L E900.0 12/18/17 23:20/cnh <br /> CLIENT PROVIDED FIELD PARAMETERS <br /> Depth to Water 12.5 feet FIELD 12/04/17 11:44/*** <br /> Field Conductivity 590 umhos/cm FIELD 12/04/17 11.44/*** <br /> Field pH 6.98 s u FIELD 12/04/17 11:44/*** <br /> Field Temperature,C 12.3 °C FIELD 12/04/17 11:44/*** <br /> Flow 0.25 gpm FIELD 12/04/17 11.44/*** <br /> ***Field data provided by client <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 5 of 38 <br />