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ENERGY r Trust our Peopte.Trustour Data. Billings,MT 800.735.4489•Casper,WY 888.235.0515 <br /> ,,,....,c-r,L,,,!•17 cc, 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, 530521,530523,530525, Collection Date: 07/06/17 09:30 <br /> Lab ID: C17070253-001 DateReceived: 07/11/17 <br /> Client Sample ID: MW-0(S30519) Matrix: Aqueous <br /> MCL/ <br /> Analyses Result Units Qualifiers RL QCL Method Analysis Date I By <br /> NUTRIENTS <br /> Nitrogen,Nitrate+Nitrate as N 0.28 mg/L 0.01 E353.2 07/14/17 11:26/eli-b <br /> Phosphorus,Total as P 0.007 mg/L 0.005 E365.1 07/14/17 14:20/eli-b <br /> METALS,DISSOLVED <br /> Aluminum ND mg/L 0 2 E200.8 07/14/17 14:48/eli-b <br /> Antimony ND mg/L 0 001 E200.8 07/14/17 14:48/eli-b <br /> Copper 0.005 mg/L 0.001 E200.8 07/14/17 14 48/eli-b <br /> Thallium ND mg/L 0.0002 E200 8 07/14/17 14:48/eli-b <br /> METALS,TOTAL <br /> Aluminum ND mg/L 0.2 E200.8 07/17/17 23:25/eli-b <br /> Antimony ND mg/L 0 001 E200.8 07/20/17 13:10/eli-b <br /> Copper 0.004 mg/L 0.001 E200.8 07/24/17 18:14/eli-b <br /> Mercury ND mg/L 0.0001 E245.1 07/14/17 15:48/eli-b <br /> Silver ND mg/L 0 00005 E200.8 07/20/17 13:10/eli-b <br /> Thallium ND mg/L 0.0002 E200.8 07/24/17 18.14/eli-b <br /> RADIONUCLIDES,TOTAL <br /> Gross Alpha 322 pCi/L E900.0 08/10/17 14:15/trs <br /> Gross Alpha precision(±) 62.8 pCi/L E900.0 08/10/17 14:15/Us <br /> Gross Alpha MDC 2 2 pCi/L E900.0 08/10/17 14:15/trs <br /> Gross Beta 89.2 pCi/L E900.0 08/10/17 14 15/trs <br /> Gross Beta precision(±) 9.3 pCi/L E900.0 08/10/17 14:15/trs <br /> Gross Beta MDC 2.9 pCi/L E900.0 08/10/17 14:15/trs <br /> CLIENT PROVIDED FIELD PARAMETERS <br /> Depth to Water 11.87 feet FIELD 07/06/17 09:30/"' <br /> Field Conductivity 0.603 umhos/cm FIELD 07/06/17 09:30/'"' <br /> Field pH 6.98 s u FIELD 07/06/17 09:30/"' <br /> Field Temperature,C 9.9 `C FIELD 07/06/17 09:30/•" <br /> Oxidation-Reduction Potential(ORP) 66.8 mV FIELD 07/06/17 09.30/"' <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 3 of 32 <br />