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ENERGY -4 Trust our People.Trust our Data. 1 Billings,MT 800.735.4489•Casper,WY 888.235.0515 <br /> "I° ,C,91 WY 866.686.7115•Helena,MT 877.972.0711 <br /> - - J <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: 07/28/17 09:12 <br /> Lab ID: C17080035-004 DateReceived: 08/01/17 <br /> Client Sample ID: MW-13(S30168) 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 14:00/IjI <br /> Phosphorus,Total as P ND mg/L 0.005 E365.1 08/07/17 1541/eli-b <br /> METALS,DISSOLVED <br /> Aluminum ND mg/L 0 2 E200.7 08/07/17 22:09/eli-b <br /> Antimony ND mg/L 0 001 E200.8 08/08/17 03.33/ell-b <br /> Copper ND mg/L 0.001 E200.8 08/08/17 03:33/eli-b <br /> Thallium ND mg/L 0.0002 E200.8 08/08/17 03:331 ell-b <br /> METALS,TOTAL <br /> Aluminum ND mg/L 0.2 E200 8 08/07/17 20:08/eli-b <br /> Antimony ND mg/L 0.001 E200.8 08/07/17 20.08/eli-b <br /> Copper ND mg/L 0.001 E200.8 08/07/17 20:08/eli-b <br /> Mercury ND mg/L 0.0001 E245.1 08/08/17 11 22/eli-b <br /> Silver ND mg/L 0.00005 E200.8 08/07/17 20 08/eli-b <br /> Thallium ND mg/L 0.0002 E200.8 08/07/17 20:08!eli-b <br /> RADIONUCLIDES,TOTAL <br /> Gross Alpha 29.0 pCi/L E900.0 08/18/17 01:02/cng <br /> Gross Alpha precision(±) 6.2 pCi/L E900.0 08/18/17 01:02/cng <br /> Gross Alpha MDC 1.7 pCi/L E900.0 08/18/17 01.02/cng <br /> Gross Beta 13.0 pCi/L E900.0 08/18/17 01:02/cng <br /> Gross Beta precision(t) 2.2 pCi/L E900.0 08/18/17 01:02/cng <br /> Gross Beta MDC 3.6 pCi/L E900.0 08/18/17 01:02/cng <br /> CLIENT PROVIDED FIELD PARAMETERS <br /> Field Conductivity 479 umhos/cm FIELD 07/28/17 09:12/"'" <br /> Field pH 6.69 s.u. FIELD 07/28/17 09:12/"' <br /> Field Temperature,C 9.7 `C FIELD 07/28/17 09 12/*** <br /> Oxidation-Reduction Potential(ORP) 628 mV FIELD 07/28/17 09.12/"' <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 6 of 22 <br />