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ADZ Laboratories, Inc. ' <br /> 2773 Downhill Drive Steamboat Springs, CO 80487(800)334-5493 <br /> Ouray Silver Mines ACZ Sample ID: L73467-01 <br /> Project ID: Date Sampled: 05125122 11:38 <br /> Sample ID: GW-2A Date Received: 05/26/22 <br /> Sample Matrix: Groundwater <br /> Wet Chemistry <br /> Alkalinity as CaCO3 SM2320B-Titration <br /> Bicarbonate as 1 30.1 mg/L 2 20 06/01/22 0-00 jck <br /> CaCO3 <br /> Carbonate as CaCO3 1 <2 U mg/L 2 20 06/01/22 0:00 jck <br /> Hydroxide as CaCO3 1 <2 U mg/L 2 20 06/01/22 0:00 jck <br /> Total Alkalinity 1 301 mg/L 2 20 06/01/22 0:00 jck <br /> Cation-Anion Balance Calculation <br /> Cation-Anion Balance 0.0 % 07/15/22 0:00 calc <br /> Sum of Anions 2 meq/L 07/15/22 0:00 calc <br /> Sum of Cations 2 meq/L 07/15/22 0:00 calc <br /> Chloride SM4500CI-E 1 0.61 B mg/L 0.5 2 05/31/2216:29 bls <br /> Conductivity @25C SM2510B 1 215 umhos/cm 1 10 06/01/22 3-00 jck <br /> Cyanide,total M335 4-Colonmetric w/distillation 05 <0.003 UH mg/L 0 003 0.01 07/12/22 14.50 mrd <br /> Fluoride SM450OF-C 1 0.25 B - mg/L 0.15 0.35 06/06/2217:18 emk <br /> Hardness as CaCO3 SM2340B-Calculation 92 mg/L 0.2 5 07/15/22 0:00 calc <br /> (dissolved) <br /> Nitrate/Nitrite as N M353 2-H2SO4 preserved 1 0.734 * mg/L 0.02 0.1 06/04/22 22:31 plb <br /> pH(lab) SM4500H+B <br /> pH 1 7.7 H units 0.1 01 06/01/22 0:00 jck <br /> pH measured at 1 21 9 C 0.1 0.1 06/01/22 0:00 jck <br /> Phosphorus,total M365 1-Auto Ascorbic Acid 1 <0.01 U mg/L 0.01 0.05 06/10/22 2:39 P1b <br /> Residue, Filterable SM2540C 1 142 mg/L 20 40 05/31/22 15:14 emk <br /> (TDS)@180C <br /> Residue, Non- SM2540D 1 <5 U mg/L 5 20 06/01/22 13:41 anc <br /> Filterable(TSS) <br /> @105C <br /> Sulfate D516-02/-07/-11-TURBIDIMETRIC 5 63.0 mg/L 5 25 05/29/22 12:53 mjj1 <br /> TDS(calculated) Calculation 127 mg/L 07/15/22 0.00 calc <br /> TDS(ratio- calculation 1 12 07/15/22 0-00 calc <br /> measured/calculated) <br /> REPIN.02.06.05.01 *Please refer to Qualifier Reports for details. <br /> L73467-2207151358 Page 4 of 25 <br />