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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: L71783-01 <br /> Project ID: Date Sampled: 03102122 13:40 <br /> Sample ID: GW-3R Date Received: 03104122 <br /> Sample Matrix: Groundwater <br /> Wet Chemistry <br /> Parameter EPA Method Dilution Result Qual XQ Units MDL POL Date Analyst' <br /> Alkalinity as CaCO3 SM2320B-Titration <br /> Bicarbonate as 1 37.9 mg/L 2 20 03/09/22 0:00 jck <br /> CaCO3 <br /> Carbonate as CaCO3 1 <2 U mg/L 2 20 03/09/22 0:00 jck <br /> Hydroxide as CaCO3 1 <2 U mg/L 2 20 03/09/22 0:00 jck <br /> Total Alkalinity 1 37.9 mg/L 2 20 03/09/22 0:00 jck <br /> Cation-Anion Balance Calculation <br /> Cation-Anion Balance -6.7 % 03/23/22 0:00 calc <br /> Sum of Anions 2.4 meq/L 03/23/22 0:00 calc <br /> Sum of Cations 2.1 meq/L 03/23/22 0:00 calc <br /> Chloride SM4500CI-E 1 0.54 B mg/L 0.5 2 03/23/2211:10 mjj1 <br /> Conductivity @25C SM2510B 1 218 umhos/cm 1 10 03/09/22 0:46 jck <br /> Cyanide,total M335.4-Colorimetric w/distillation 0.5 <0.003 U mg/L 0.003 0.01 03/07/22 14:22 bls <br /> Fluoride SM450OF-C 1 <0.15 U mg/L 0.15 0.35 03/17/2213:18 emk <br /> Hardness as CaCO3 SM2340B-Calculation 98.0 mg/L 0.2 5 03/23/22 0:00 calc <br /> (dissolved) <br /> Nitrate/Nitrite as N M353.2-H2SO4 preserved 1 0.211 mg/L 0.02 0.1 03/23/22 2:04 pjb <br /> pH(lab) SM4500H+B <br /> pH 1 7.5 H units 0.1 0.1 03/09/22 0:00 jck <br /> pH measured at 1 21.9 C 0.1 0.1 03/09/22 0:00 jck <br /> Phosphorus,total M365.1-Auto Ascorbic Acid 1 <0.01 U mg/L 0.01 0.05 03/08/22 16:19 bls <br /> (digest) <br /> Residue,Filterable sM2540C 1 142 mg/L 20 40 03/04/22 16:07 jck <br /> (TDS)@180C <br /> Residue, Non- SM2540D 1 <5 U mg/L 5 20 03/07/22 13:48 anc <br /> Filterable(TSS) <br /> @105C <br /> Sulfate D516-02/-07/-11-TURBIDIMETRIC 5 75.8 mg/L 5 25 03/14/22 22:53 mjjl <br /> TDS(calculated) Calculation 148 mg/L 03/23/22 0:00 calc <br /> TDS(ratio- Calculation 0.96 03/23/22 0:00 calc <br /> measured/calculated) <br /> REPIN.02.06.05.01 *Please refer to Qualifier Reports for details. <br /> L71783-2203231609 Page 3 of 19 <br />