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ENERGY C--..4-7 Trust our People.Trust our Data. Billings,MT 800.735.4489•Casper,WY 888.235.0515 <br /> ' '"' Gillette,WY 886.686.7175•Helena,MT 817.472.0711 <br /> LABORATORY ANALYTICAL REPORT <br /> Prepared by Casper,WY Branch <br /> Client: Cotter Corporation Report Date: 08/18/17 <br /> Project: Schwartzwalder Mine 7/31/17 S30160,S30162,S60166 Collection Date: 07/27/17 10:39 <br /> Lab ID: C17080035-003 DateReceived: 08/01/17 <br /> Client Sample ID: MW-15(S30166) Matrix: Aqueous <br /> MCU <br /> Analyses Result Units Qualifiers RL QCL Method Analysis Date!By <br /> NUTRIENTS <br /> Nitrogen,Nitrate+Nitrite as N ND mg/L 0.01 E353.2 08/04/17 13:59/Ijl <br /> Phosphorus,Total as P ND mg/L 0.005 E365.1 08/07/17 15:40/ell-b <br /> METALS,DISSOLVED <br /> Aluminum ND mg/L 0.2 E200.7 08/07/17 22:05/eli-b <br /> Antimony ND mg/L 0.001 E200.8 08/08/17 03:29/eli-b <br /> Copper ND mg/L 0.001 E200.8 08/08/17 03:29/eli-b <br /> Thallium ND mg/L 0.0002 E200.8 08/08/17 03:29/eli-b <br /> METALS,TOTAL <br /> Aluminum ND mg/L 0 2 E200.8 08/07/17 20 05/eli-b <br /> Antimony ND mg/L 0.001 E200 8 08/07/17 20:05/eli-b <br /> Copper ND mg/L 0.001 E200.8 08/07/17 20:05/eli-b <br /> Mercury ND mg/L 0.0001 E245.1 08/08/17 11:20/eli-b <br /> Silver ND mg/L '0.00005 E200.8 08/07/17 20.05/eli-b <br /> Thallium ND mg/L 0.0002 E200.8 08/07/17 20:051 eli-b <br /> RADIONUCLIDES,TOTAL <br /> Gross Alpha 78.2 pCi/L E900.0 08/18/17 01 02/cng <br /> Gross Alpha precision(±) 15.7 pCi/L E900.0 08/18/17 01:02/cng <br /> Gross Alpha MDC 1.9 pCi/L E900.0 08/18/17 01:02/cng <br /> Gross Beta 22.8 pCi/L E900.0 08/18/17 01:02/cng <br /> Gross Beta precision(±) 2.8 pCi/L E900.0 08/18/17 01.02/cng <br /> Gross Beta MDC 2.7 pCi/L E900 0 08/18/17 01:02/cng <br /> CLIENT PROVIDED FIELD PARAMETERS <br /> Field Conductivity 690 umhos/cm FIELD 07/27/17 10:39/"' <br /> Field pH 7.20 s.u. FIELD 07/27/17 10.39/"' <br /> Field Temperature,C 11.5 °C FIELD 07/27/17 10.39/"' <br /> Oxidation-Reduction Potential(ORP) -209.2 mV FIELD 07/27/17 10:39/"' <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 22 <br />