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� • Trustout People Trust our 11""L <br />r:YM.CnP��•la 1, rnrn <br />LABORATORY ANALYTICAL REPORT <br />Prepared by Casper, WY Branch <br />Client: Alexco Resource US Corp <br />Project Schwadzwelder Mine <br />Lain ID: C1 B030580-008 <br />Client Sample ID: SW -BPL <br />Billings, NET 800.735.4489 • Casper, WY 888.235.0515 <br />Gillette -0866.686.7175 + He:ena. MI 877.472.0711 <br />Report Date: 04/18/18 <br />Collection Date: 03/14/18 14-28 <br />DateRece ived: 03120118 <br />Matrix: Aqueous <br />MCLI <br />Analyses Result Units Qualifiers RL QCL Method Analysis Date I By <br />MAJOR IONS <br />Fluoride <br />0 3 mg/L <br />0. i <br />A4500•F C <br />03120118 20.181 mvr <br />INORGANICS <br />Cyan!de, Weak Add Dissociable <br />NO mg/L <br />0.005 <br />Kelada-01 <br />03123118 11.051 eli-b <br />NUTRIENTS <br />Nitrogen, Nitrate+Nitdie as N <br />001 mg1L <br />0.01 <br />E3532 <br />0312211811.461 dmb <br />Phosphorous, Total as Phosphate <br />NO mg/L <br />0.03 <br />Calculation <br />03130118 12.13 1 sea <br />Phosphorus, Total as P <br />0 008 mg/L <br />0,005 <br />E365.1 <br />03/28/18 15 54 1 dmb <br />METALS, DISSOLVED <br />Aluminum <br />NO mg/L <br />0,2 <br />E200 8 <br />03/26/18 14.11 1 ell•b <br />Antimony <br />NO MVL <br />0.001 <br />E200 B <br />03126118 14 11 / ell -b <br />Molybdenum <br />NO mg/L <br />0.005 <br />E200.8 <br />03/26118 14-111 eli-b <br />Thallium <br />NO mg/L <br />O.DD02 <br />E200 8 <br />03/26/18 14:11 / eli-b <br />Uranium <br />0.0073 mg/L <br />00002 <br />E2D0.8 <br />03/26118 14,111 ell -b <br />METALS, TOTAL <br />Aluminum <br />ND mg/L <br />0.2 <br />E2DO.8 <br />03124118 04:151 ell -b <br />Antimony <br />NO mg/L <br />0.001 <br />E200.8 <br />03/24118 04:151 ell -b <br />Arsenic <br />NO mg/L <br />0 001 <br />E200.8 <br />03124118 04.151 ell -b <br />Boron <br />NO mg/L <br />01 <br />E20D.7 <br />03/26118 22:271 eli-b <br />Mercury <br />NO mg/L <br />00001 <br />E245.1 <br />03127118 15:061 eH-b <br />Molybdenum <br />NO mg/L <br />0 005 <br />E200.8 <br />03124/18 04.15 / ell -b <br />Thallium <br />NO mg/L <br />00002 <br />E200.8 <br />03/24/18 04:151 eli-b <br />Uranium <br />0:7076 mg1L <br />00002 <br />✓ 200.8 <br />03/24/18 04.15 / eli-b <br />RADIONUCLIDES, DISSOLVED <br />Radium 226 <br />0.2 pC11L <br />U <br />E903 0 <br />04102/18 15:08 / arh <br />Radium 22a precision (t) <br />01 pCVL <br />E903.0 <br />04/02/18 15 081 arh <br />Radium 226 MDC <br />0.2 pCi/L <br />E903 0 <br />04102/18 15:08 / arh <br />RADIONUCLIDES, TOTAL <br />Gross Alpha <br />4.2 pCilL <br />E900 0 <br />03129/18 22:461 trs <br />Gross Alpha precision (t) <br />2.0 pCl1L <br />E900.0 <br />03129/18 22:461 trs <br />Gross Xpha MDC <br />2.1 pCi/L <br />E900.0 <br />03129/18 22:46 / trs <br />Gross Beta <br />30 pCi1L <br />U <br />E900,0 <br />03129/18 22:461 Irs <br />Gross Beta precis.on (t) <br />1.7 pCi/L <br />E900.0 <br />03/29/18 22:461 trs <br />Gross Beta MDC <br />32 pCi/L <br />E900,0 <br />03/29/18 22:461 trs <br />Radium 226 <br />03 pCVL <br />E903.0 <br />04/02/18 11:431 arh <br />Radium 226 precision (t) <br />02 pCVL <br />E903.0 <br />04102/18 11:431 arh <br />Radium 226 MDC <br />0.2 pCi/L <br />E903.0 <br />04102/18 11:43 / arh <br />Radium 228 <br />0.6 pCVL <br />U <br />RA -05 <br />0312811810:551 plj <br />Radium 228 precision (tJ <br />1.1 pCVL <br />RA -05 <br />OY28118 10:551 pij <br />Radium 228 MDC <br />1,8 pCVL <br />RA -05 <br />03128118 10:551 pij <br />Report RL - Analyte reporting limit. <br />MCL - Maximum contaminant level <br />Definitions: QCL - Quality control limit <br />ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />U - Not detected at minimum detectable concentration <br />Page 12 of 40 <br />