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EI'ERGY41Trustour People.Trust our Data. Billings,MT 800.735.4489•Casper,WY 888.235.0515 <br /> 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 S30519, S30521,S30523,S30525, Collection Date: 07/07/17 10:00 <br /> Lab ID: C17070253-007 DateReceived: 07/11/17 <br /> Client Sample ID: Sump 5(S30531) Matrix: Aqueous <br /> MCL/ <br /> Analyses Result Units Qualifiers RL QCL Method Analysis Date!By <br /> NUTRIENTS <br /> Nitrogen,Nitrate+Nitrite as N 1.22 mg/L 0.01 E353-2 07/14/17 11:38/eli-b <br /> Phosphorus,Total as P ND mg/L 0 005 E365.1 07/17/17 14:00/eli-b <br /> METALS,DISSOLVED , <br /> Aluminum ND mg/L 0.2 E200.8 07/14/17 15:04/eli-b <br /> Antimony ND mg/L 0.001 E200 8 07/14/17 15 04/eli-b <br /> Copper 0-010 mg/L 0.001 E200 8 07/14/17 15:04/eli-b <br /> Thallium ND mg/L 0.0002 E200.8 07/14/17 15.04/eli-b <br /> METALS,TOTAL <br /> Aluminum ND mg/L 0.2 E200.8 07/18/17 00:13/eli-b <br /> Antimony ND mg/L 0 001 E200-8 07/21/17 20:48/eli-b <br /> Copper 0.009 mg/L 0.001 E200 8 07/18/17 00 13/eli-b <br /> Mercury ND mg/L 0.0001 E245.1 07/14/17 16:03/eli-b <br /> Silver ND mg/L 0.00005 E200.8 07/21/17 20.48/eli-b <br /> Thallium ND mg/L 0 0002 E200.8 07/24/17 18:48/eli-b <br /> RADIONUCLIDES,TOTAL <br /> Gross Alpha 1290 pCi/L E900.0 08/10/17 02-38/trs <br /> Gross Alpha precision(±) 250 pCi/L E900.0 08/10/17 02:38/trs <br /> Gross Alpha MDC 2 9 pCi/L E900 0 08/10/17 02:38/trs <br /> Gross Beta 512 pCi/L E900.0 08/10/17 02:38/trs <br /> Gross Beta precision(±) 51 9 pCi/L E900.0 08/10/17 02:38/trs <br /> Gross Beta MDC 3.3 pCi/L E900.0 08/10/17 02:38/trs <br /> CLIENT PROVIDED FIELD PARAMETERS <br /> Depth to Water 7.58 feet FIELD 07/07/17 10:00/*** <br /> Field Conductivity 0.98 umhos/cm FIELD 07/07/17 10:00/*** <br /> Field pH 7.28 s.u. FIELD 07/07/17 10:00/*** <br /> Field Temperature,C 15.1 °C FIELD 07/07/17 10:00/*** <br /> Oxidation-Reduction Potential(ORP) 106.5 mV FIELD 07/07/17 10 00/"' <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 9 of 32 <br />