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�I© Trust our People.Trust our Data. ( Billings,MT 800.735.4489•Casper,WY 888.235.0515 <br /> I i 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: 02/26/18 <br /> Project: Schwartzwalder Mine Collection Date: 01/24/18 09:45 <br /> Lab ID: C18010709-007 DateReceived: 01/25/18 <br /> Client Sample ID: Mine Refill Matrix: Aqueous <br /> MCL/ <br /> Analyses Result Units Qualifiers RL QCL Method Analysis Date/By <br /> NON-METALS <br /> Organic Carbon,Total(TOC) 130 mg/L D 08 A5310 C 01/29/18 16 22/dmb <br /> METALS, DISSOLVED <br /> Arsenic 0.009 mg/L 0.001 E200.8 01/30/18 19.08/eli-b <br /> Barium 097 mg/L 0.05 E200.8 01/30/18 19:08/eli-b <br /> Iron 1 99 mg/L 002 E200.8 01/30/18 19-08/eli-b <br /> Manganese 1 27 mg/L D 0 006 E200.7 01/30/18 20 31 /eli-b <br /> Molybdenum 0 214 mg/L 0 001 E200.8 01/30/18 19-08/eli-b <br /> Uranium 12.3 mg/L 00003 E200.8 01/31/18 17.14/eli-b <br /> METALS,TOTAL <br /> Arsenic 0 009 mg/L 0 001 E200.8 01/31/18 01:08/eli-b <br /> Barium 299 mg/L 005 E200 8 01/31/18 01:08/eli-b <br /> Iron 227 mg/L 0.03 E200.8 01/31/18 01:08/eli-b <br /> Manganese 1.35 mg/L 0 001 E200 8 01/31/18 01:08/eli-b <br /> Molybdenum 0207 mg/L 0.001 E200.8 02/07/18 15:19/eli-b <br /> Uranium 134 mg/L 00003 E200 8 01/31/18 01.08/eli-b <br /> RADIONUCLIDES,TOTAL <br /> Radium 226 2.2 pCi/L E903 0 02/20/18 08-35/arh <br /> Radium 226 precision(±) 0 5 pCi/L E903.0 02/20/18 08 35/arh <br /> Radium 226 MDC 0.1 pCi/L E903 0 02/20/18 08.35/arh <br /> Radium 228 1.1 pCdL U RA-05 02/13/18 13.01 /plj <br /> Radium 228 precision(±) 1 0 pCi/L RA-05 02/13/18 13 01 /pll <br /> Radium 228 MDC 1.2 pCi/L RA-05 02/13/18 13 01 /plj <br /> Radium 226+Radium 228 33 pCi/L A7500-RA 02/21/18 16.59/sec <br /> Radium 226+Radium 228 precision(±) 1.2 pCdL A7500-RA 02/21/18 16 59/sec <br /> Radium 226+Radium 228 MDC 1.3 pCi/L A7500-RA 02/21/18 16-59/sec <br /> CLIENT PROVIDED FIELD PARAMETERS <br /> Field Conductivity 5503 uS/cm FIELD 01/24/18 09 45 <br /> Field pH 754 s u FIELD 01/24/18 09-45 <br /> Field Temperature,C 152 °C FIELD 01/24/18 09.45 <br /> Oxidation-Reduction Potential(ORP) 64.8 mV FIELD 01/24/18 09-45 <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 D-RL increased due to sample matrix <br /> U-Not detected at minimum detectable concentration <br /> Page 9 of 28 <br />