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AOZ <br /> Laboratories, Inc. <br /> 2773 Downhill Drive Steamboat Springs, CO 80487(800)334-5493 <br /> Ouray Silver Mines ACZ Sample ID: L37780-03 <br /> Project ID: OSM152335 Date Sampled: 06112117 13:25 <br /> Sample ID: SW-16 Date Received: 06114117 <br /> Sample Matrix: Ground Water <br /> Wet Chemistry <br /> Parameter EPA Method Dilution Result Mua[ XQ Units MDL Date <br /> Analyst- <br /> Alkalinity as CaCO3 SM2320B-Titration <br /> Bicarbonate as 1 21.7 mg/L 2 20 06/16/17 0:00 abd <br /> CaCO3 <br /> Carbonate as CaCO3 1 U mg/L 2 20 06/16/17 0-00 abd <br /> Hydroxide as CaCO3 1 U mg/L 2 20 06/16/17 0:00 abd <br /> Total Alkalinity 1 21.7 mg/L 2 20 06/16/17 0 00 abd <br /> Cation-Anion Balance Calculation <br /> Cation-Anion Balance -3.2 % 06/27/17 0:00 calc <br /> Sum of Anions 0.985 meq/L 06/27/17 0:00 calc <br /> Sum of Cations 0 923 meq/L 06/27/17 0 00 calc <br /> Chloride SM4500CI-E 1 U * mg/L 0.5 2 06/20/1714:24 spi <br /> Conductivity @25C SM25108 1 105 umhos/cm 1 10 06/16/17 23:44 abd <br /> Cyanide,total M335 4-Colorimetricw/distillabon 05 U * mg/L 0.003 001 06/23/1715:53 wtc <br /> Fluoride SM450OF-c 1 0.10 B mg/L 0.05 03 06/20/17 18:50 abd <br /> Hardness as CaCO3 SM2340B-Calculation 41 mg/L 0.2 5 06/27/17 0 00 calc <br /> (dissolved) <br /> Nitrate/Nitrite as N M353 2-H2SO4 preserved 1 0.13 * mg/L 0.02 0.1 06/21/17 23 50 pjb <br /> pH(lab) SM4500H+B <br /> pH 1 7.4 H units 0.1 0.1 06/16/17 0 00 abd <br /> pH measured at 1 23.9 C 0.1 0.1 06/16/17 0:00 abd <br /> Phosphorus,ortho M365 1-Automated Ascorbic Acid 1 UH mg/L 0.02 0.05 06/14/17 23 51 pjb <br /> dissolved <br /> Residue, Filterable SM2540C 1 54 mg/L 10 20 06/17/17 9.45 the <br /> (TDS)@180C <br /> Residue, Non- SM2540D 1 U mg/L 5 20 06/16/17 11.46 the <br /> Filterable(TSS) <br /> @105C <br /> Sulfate D516-02/-07-Turbidimetric 1 26.0 mg/L 1 5 06/23/1713-24 spl <br /> TDS(calculated) Calculation 61.5 mg/L 06/27/17 0:00 calc <br /> TDS(ratio- Calculation 0.88 06/27/17 0 00 calc <br /> measured/calculated) <br /> RE PI N.02.06.05.01 *Please refer to Qualifier Reports for details. <br /> L37780-1706271658 Page 7 of 21 <br />