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ENERGYTrust ourPeople.TrustourData. Billings,MT 800.735.4489•Casper,WY 888.235.0515 <br /> „ --' _ J� Gillette.WY 866.686.7175•Helena,MT 877.472.0111 <br /> LABORATORY ANALYTICAL REPORT <br /> Prepared by Casper,WY Branch <br /> Client: Cotter Corporation Report Date: 08/21/17 <br /> Project: Schwartzwalder Mine S30519, S30521,S30523,530525, Collection Date: 07/06/17 12:30 <br /> Lab ID: C17070253-003 DateReceived: 07/11/17 <br /> Client Sample ID: MW-19(S30523) Matrix: Aqueous <br /> MCL/ <br /> Analyses Result Units Qualifiers RL QCL Method Analysis Date/By <br /> NUTRIENTS <br /> Nitrogen,Nitrate+Nitrite as N 0 38 mg/L 0.01 E353.2 07/14/17 11:28/eli-b <br /> Phosphorus,Total as P 0 036 mg/L 0.005 E365.1 07/14/17 14:23/eli-b <br /> METALS,DISSOLVED <br /> Aluminum ND mg/L 0 2 E200.8 07/14/17 14:53/eli-b <br /> Antimony ND mg/L 0 001 E200 8 07/14/17 14:53/eli-b <br /> Copper 0 001 mg/L 0 001 E200.8 07/14/17 14:53/eli-b <br /> Thallium ND mg/L 0 0002 E200.8 07/14/17 14531 eli-b <br /> METALS,TOTAL <br /> Aluminum 0.8 mg/L 0.2 E200 8 07/17/17 23:49/eli-b <br /> Antimony ND mg/L 0.001 E200.8 07/28/17 14.331 ell-b <br /> Copper 0 003 mg/L 0 001 E200.8 07/28/17 14.33/eli-b <br /> Mercury ND mg/L 0 0001 E245 1 07/14/17 15:51/eli-b <br /> Silver 0.00039 mg/L 0 00005 E200.8 07/21/17 20:35/eli-b <br /> Thallium ND mg/L 0 0002 E200.8 07/28/17 14:33 I eli-b <br /> RADIONUCLIDES,TOTAL <br /> Gross Alpha 690 pCi/L E900.0 08/10/17 14:15/trs <br /> Gross Alpha precision(±) 134 pCi/L E900 0 08/10/17 14:151 trs <br /> Gross Alpha MDC 2.5 pCi/L E900.0 08/10/17 14:15/trs <br /> Gross Beta 295' pCi/L E900.0 08/10/17 14.15/trs <br /> Gross Beta precision(±) 30 1 pCi/L E900.0 08/10/17 14:15/trs <br /> Gross Beta MDC 3.3 pCi/L E900.0 08/10/17 14:15/trs <br /> CLIENT PROVIDED FIELD PARAMETERS <br /> Depth to Water 16.37 feet FIELD 07/06/17 12:30/"" <br /> Field Conductivity 0.656 umhos/cm FIELD 07/06/17 12:30/*** <br /> Field pH 7.41 s.u. FIELD 07/06/17 12:30/**" <br /> Field Temperature,C 11.3 `C FIELD 07/06/17 12:30/*** <br /> Oxidation-Reduction Potential(ORP) 88.8 mV FIELD 07/06/17 12:30/*** <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 32 <br />