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A CZ Laboratories, Inc. <br />2773 Downhill Drive Steamboat Springs, CO 80487 (800) 334-5493 <br />Rio Grande Silver, Inc. ACZ Sample ID: <br />L25209-01 <br />Project ID: BO 33504 Date Sampled: <br />06/30/15 10.30 <br />Sample ID: W -FLUME Date Received: <br />07/01/15 <br />Sample Matrix: <br />Surface Water <br />Zinc, total recoverable M200.8 ICP -MS 1 0.676 mg/L 0.002 0.005 07/09/15 13:57 scp <br />Wet Chemistry <br />REPIN.02.06.05.01 * Please refer to Qualifier Reports for details. <br />L25209-1507241357 Page 5 of 45 <br />r <br />« <br />« ® <br />21011�. <br />Alkalinity as CaCO3 <br />SM2320B - Titration <br />Bicarbonate as <br />1 21.4 <br />mg/L <br />2 <br />20 <br />07/02/15 0:00 <br />tms <br />CaCO3 <br />Carbonate as CaCO3 <br />1 <br />U <br />mg/L <br />2 <br />20 <br />07/02/15 0:00 <br />tms <br />Hydroxide as CaCO3 <br />1 <br />U <br />mg/L <br />2 <br />20 <br />07/02/15 0:00 <br />tms <br />Total Alkalinity <br />1 21.4 <br />mg/L <br />2 <br />20 <br />07/02/15 0:00 <br />tms <br />Carbon, dissolved <br />SM5310B <br />1 <br />U <br />mg/L <br />1 <br />5 <br />07/23/15 15:33 <br />jlf <br />organic (DOC) <br />Cation -Anion Balance <br />Calculation <br />Cation -Anion Balance <br />-1.9 <br />% <br />07/24/15 11:19 <br />calc <br />Sum of Anions <br />0.727 <br />meq/L <br />07/24/15 11:19 <br />calc <br />Sum of Cations <br />0.7 <br />meq/L <br />07/24/15 11:19 <br />calc <br />Chemical Oxygen <br />M410.4 <br />1 <br />U <br />* mg/L <br />10 <br />20 <br />07/06/1515:51 <br />enb <br />Demand <br />Chloride <br />M300.0 - Ion Chromatography <br />1 <br />U <br />mg/L <br />0.5 <br />2.5 <br />07/10/15 2:31 <br />bsu <br />Fluoride <br />SM450OF-C <br />1 0.06 <br />B <br />mg/L <br />0.05 <br />0.3 <br />07/08/1513:11 <br />enb <br />Hardness as CaCO3 <br />SM2340B - Calculation <br />26 <br />mg/L <br />0.8 <br />4 <br />07/24/15 11:19 <br />calc <br />Nitrate as N, dissolved <br />Calculation: N031\102 minus NO2 <br />0.26 <br />mg/L <br />0.02 <br />0.1 <br />07/24/15 11:19 <br />calc <br />Nitrate/Nitrite as N, <br />M353.2 - Automated <br />1 0.26 <br />mg/L <br />0.02 <br />0.1 <br />07/01/15 17:16 <br />jlf <br />dissolved <br />Cadmium Reduction <br />Nitrite as N, dissolved <br />M353.2 -Automated <br />1 <br />U <br />* mg/L <br />0.01 <br />0.05 <br />07/01/15 17:16 <br />jlf <br />Cadmium Reduction <br />Nitrogen, ammonia <br />M350.1 <br />1 <br />U <br />mg/L <br />0.05 <br />0.2 <br />07/13/15 13:44 <br />jif <br />Nitrogen, organic <br />M351.2 8 M350.1 - TKN minus NH3 <br />0,1 <br />B <br />mg/L <br />0.1 <br />0.5 <br />07/24/15 11:19 <br />calc <br />Nitrogen, total Kjeldahl <br />M351.2 - TKN by Block Digester <br />1 0.1 <br />B <br />mg/L <br />0.1 <br />0.5 <br />07/09/15 23:19 <br />pjb <br />pH (lab) <br />SM45001-1. B <br />pH <br />1 7.7 <br />H <br />units <br />0.1 <br />0.1 <br />07/02/15 0:00 <br />tms <br />pH measured at <br />1 19.8 <br />C <br />0.1 <br />0.1 <br />07/02/15 0:00 <br />tms <br />Phosphorus, total <br />M365.1 - Auto Ascorbic <br />1 0.05 <br />* mg/L <br />0.01 <br />0.05 <br />07/10/15 20:55 <br />pjb <br />Acid (digest) <br />Residue, Filterable <br />SM2540C <br />1 60 <br />mg/L <br />10 <br />20 <br />07/01/15 15:14 <br />enb <br />(TDS) @180C <br />Residue, Non- <br />SM2540D <br />1 <br />U <br />mg/L <br />5 <br />20 <br />07/02/15 15:40 <br />enb <br />Filterable (TSS) <br />@105C <br />Sulfate <br />M300.0 - Ion Chromatography <br />1 13.2 <br />mg/L <br />0.5 <br />2.5 <br />07/10/15 2:31 <br />bsu <br />Sulfide as S <br />SM450OS2-D <br />1 <br />U <br />* mg/L <br />0.02 <br />0.1 <br />07/06/15 15:16 <br />enb <br />REPIN.02.06.05.01 * Please refer to Qualifier Reports for details. <br />L25209-1507241357 Page 5 of 45 <br />