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ACZ Laboratories, Inc. <br /> 2773 Downhill Drive Steamboat Springs, CO 80487(800)334-5493 <br /> Rio Grande Silver, Inc. ACZ Sample ID: L26557-01 <br /> Project ID: BO-34028 Date Sampled: 09109115 10:05 <br /> Sample ID: W-FLUME Date Received: 09110115 <br /> Sample Matrix: Surface Water <br /> Zinc,total recoverable M200.81CP-MS 5 2.31 mg/L 0.01 0.03 09/29/15 15:26 mfm <br /> Wet Chemistry <br /> MethodParameter EPA Dilution Result Qual XQ Units MDL PQL Date Analystl <br /> Alkalinity as CaCO3 SM2320B-Titration <br /> Bicarbonate as 1 25.4 mg/L 2 20 09/17/15 0:00 enb <br /> CaCO3 <br /> Carbonate as CaCO3 1 U mg/L 2 20 09/17/15 0:00 enb <br /> Hydroxide as CaCO3 1 U mg/L 2 20 09/17/15 0:00 enb <br /> Total Alkalinity 1 25.4 * mg/L 2 20 09/17/15 0:00 enb <br /> Carbon,dissolved SM5310B 1 U mg/L 1 5 09/18/15 16:33 bsu/jlf <br /> organic(DOC) <br /> Cation-Anion Balance Calculation <br /> Cation-Anion Balance 0.0 % 10/01/15 13:49 calc <br /> Sum of Anions 1.3 meq/L 10/01/15 13:49 calc <br /> Sum of Cations 1.3 meq/L 10/01/15 13:49 calc <br /> Chemical Oxygen M410.4 1 U mg/L 10 20 09/15/1510:34 enb <br /> Demand <br /> Chloride M300.0-Ion Chromatography 1 0.56 B mg/L 0.5 2.5 09/16/15 1:02 bsu <br /> Fluoride SM450OF-C 1 0.09 B mg/L 0.05 0.3 09/17/1512:57 tms <br /> Hardness as CaCO3 SM2340B-Calculation 49 mg/L 0.8 4 10/01/15 13:49 calc <br /> (dissolved) <br /> Nitrate as N,dissolved Calculation: NO3NO2 minus NO2 0.12 mg/L 0.02 0.1 10/01/15 13:49 calc <br /> Nitrate/Nitrite as N, M353.2-Automated 1 0.12 * mg/L 0.02 0.1 09/10/15 19:33 pjb <br /> dissolved Cadmium Reduction <br /> Nitrite as N,dissolved M353.2-Automated 1 U mg/L 0.01 0.05 09/10/15 19:33 pjb <br /> Cadmium Reduction <br /> Nitrogen,ammonia M350.1 1 0.15 B mg/L 0.05 0.2 09/16/15 16:01 bsu <br /> Nitrogen,organic M351.2&M350.1-TKN minus NH3 U mg/L 0.1 0.5 10/01/15 13:49 calc <br /> Nitrogen,total Kjeldahl M351.2-TKN by Block Digester 1 U mg/L 0.1 0.5 09/19/15 14:29 pjb <br /> pH(lab) SM450oH+B <br /> pH 1 7.7 H units 0.1 0.1 09/17/15 0:00 enb <br /> pH measured at 1 19.4 C 0.1 0.1 09/17/15 0:00 enb <br /> Phosphorus,total M365.1 -Auto Ascorbic 1 0.04 B mg/L 0.01 0.05 09/16/15 21:48 pjb <br /> Acid(digest) <br /> Residue,Filterable SM2540C 1 98 mg/L 10 20 09/11/15 13:37 sck <br /> (TDS)@180C <br /> Residue,Non- SM2540D 1 U mg/L 5 20 09/16/15 12:45 sck <br /> Filterable(TSS) <br /> @105C <br /> Sulfate M300.0-Ion Chromatography 1 36.5 mg/L 0.5 2.5 09/16/15 1:02 bsu <br /> Sulfide as S SM4500S2-D 1 U mg/L 0.02 0.1 09/15/15 9:27 tms <br /> REPIN.02.06.05.01 *Please refer to Qualifier Reports for details. <br /> L26557-1510011525 Page 5 of 48 <br />