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(--- <br /> ENERGY Trust our People.Trust our Data. Billings,MT 800.735.4489•Casper,WY 888.235.0515 <br /> "` Gillette.WY 866.686.1175•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 09:44 <br /> Lab ID: Cl 7070253-006 DateReceived: 07/11/17 <br /> Client Sample ID: Sump 4(S30529) Matrix: Aqueous <br /> MCL/ <br /> Analyses Result Units Qualifiers RI. QCL Method Analysis Date/By <br /> NUTRIENTS <br /> Nitrogen,Nitrate+Nitrite as N 0.44 mg/L 0.01 E353.2 07/14/17 11:36/eli-b <br /> Phosphorus,Total as P 0.007 mg/L 0.005 E365.1 07/17/17 13:59/eli-b <br /> METALS,DISSOLVED <br /> Aluminum ND mg/L 0.2 E200.8 07/14/17 15:01/els-b <br /> Antimony ND mg/L 0.001 E200.8 07/14/17 15:01/eli-b <br /> Copper 0.009 mg/L 0.001 E200.8 07/14/17 15:01/eli-b <br /> Thallium ND mg/L 0 0002 E200.8 07/14/17 1501/eli-b <br /> METALS,TOTAL <br /> Aluminum ND mg/L 0.2 E200.8 07/18/17 0009/eli-b <br /> Antimony ND mg/L 0.001 E200 8 07/21/17 20:45/eli-b <br /> Copper 0.010 mg/L 0 001 E200.8 07/18/17 00:09/eli-b <br /> Mercury ND mg/L 0 0001 E245.1 07/14/17 16:01 /eli-b <br /> Silver ND mg/L 0.00005 E200.8 07/21/17 20-45/eli-b <br /> Thallium ND mg/L 0 0002 E200.8 07/24/17 18.45/eli-b <br /> RADIONUCLIDES,TOTAL <br /> Gross Alpha 410 pCi/L E900.0 08/10/17 02:38/trs <br /> Gross Alpha precision(±) 80 1 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 172 pCi/L E900.0 08/10/17 02:38/trs <br /> Gross Beta precision(±) 17.8 pCi/L E900.0 08/10/17 02:38/trs <br /> Gross Beta MDC 4.1 pCi/L E900.0 08/10/17 02:38/trs <br /> CLIENT PROVIDED FIELD PARAMETERS <br /> Depth to Water 14.43 feet FIELD 07/07/17 09.44/"' <br /> Field Conductivity 623.7 umhos/cm FIELD 07/07/17 09:44/"' <br /> Field pH 6.95 s u FIELD 07/07/17 0944/*** <br /> Field Temperature,C 15.5 °C FIELD 07/07/17 09.44/"' <br /> Oxidation-Reduction Potential(ORP) 168.8 mV FIELD 07/07/17 09.44/"' <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 al the reporting limit. <br /> MDC-Minimum detectable concentration <br /> Page 8 of 32 <br />