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ENERGY ( - Trust our People.Trust our Data. 1 Billings,MT 800.735.4489•Casper,WY 888.235.0515 <br /> pv `'=hr <br /> 0" Gillette,WY 866.686.7175•Helena,MT 877.472.0711 <br /> LABORATORY ANALYTICAL REPORT <br /> Prepared by Casper,WY Branch <br /> Client: Cotter Corporation Report Date: 08/21/17 <br /> Project: Schwartzwalder Mine S30533,S30535,S30537 Collection Date: 07/07/17 11:30 <br /> Lab ID: C17070248-002 DateReceived: 07/11/17 <br /> Client Sample ID: Sump 9(S30535) Matrix: Aqueous <br /> MCL/ <br /> Analyses Result Units Qualifiers RL QCL Method Analysis Date 1 By <br /> NUTRIENTS <br /> Nitrogen,Nitrate+Nitrite as N 1.86 mg/L 0.01 E353.2 07/14/17 11:42/eli-b <br /> Phosphorus,Total as P ND mg/L 0.005 E365.1 07/17/17 14.04/eli-b <br /> METALS,DISSOLVED <br /> Aluminum ND mg/L 0.2 E200.8 07/14/17 15:321 ell-b <br /> Antimony ND mg/L 0.001 E200.8 07/14/17 15:32/eli-b <br /> Copper 0.018 mg/L 0.001 E200.8 07/14/17 15:32/eli-b <br /> Thallium ND mg/L 0.0002 E200.8 07/14/17 1532/eli-b <br /> METALS,TOTAL <br /> Aluminum ND mg/L 0.2 E200.8 07/18/17 00 26/eli-b <br /> Antimony ND mg/L 0.001 E200.8 07/21/17 21:12/eli-b <br /> Copper 0.028 mg/L 0.001 E200.8 07/18/17 00:26/eli-b <br /> Mercury ND mg/L 0.0001 E245.1 07/14/17 16:10/eli-b <br /> Silver ND mg/L 0 00005 E200 8 07/21/17 21:12/eli-b <br /> Thallium ND mg/L 0.0002 E200.8 07/24/17 19:06/eli-b <br /> RADIONUCLIDES,TOTAL <br /> Gross Alpha 667 pCi/L E900.0 08/10/17 14 15/trs <br /> Gross Alpha precision(t) 130 pCi/L E900.0 08/10/17 14:15/trs <br /> Gross Alpha MDC 3.0 pCi/L E900.0 08/10/17 14:15/trs <br /> Gross Beta 221 pCi/L E900.0 08/10/17 14.15/trs <br /> Gross Beta precision(±) 22.6 pCi/L E900.0 08/10/17 14:15/trs <br /> Gross Beta MDC 3.7 pCi/L E900.0 08/10/17 14:15/trs <br /> CLIENT PROVIDED FIELD PARAMETERS <br /> Depth to Water 9.46 feet FIELD 07/07/17 11:30/"' <br /> Field Conductivity 0.83 umhos/cm FIELD 07/07/17 11.30/"' <br /> Field pH 7.24 s u. FIELD 07/07/17 11.30/*" <br /> Field Temperature,C 11.5 °C FIELD 07/07/17 11:30/"' <br /> Oxidation-Reduction Potential(ORP) 173.3 mV FIELD 07/07/17 11:30 1"' <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 4 of 18 <br />