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ADZ <br /> Laboratories, Inc. <br /> 2773 Downhill Drive Steamboat Springs, CO 80487(800)334-5493 <br /> Ouray Silver Mines ACZ Sample ID: L71828-05 <br /> Project ID: Date Sampled: 03103122 13:05 <br /> Sample ID: GW-213 Date Received: 03107122 <br /> Sample Matrix: Groundwater <br /> Wet Chemistry <br /> Parameter EPA Method Dilution Result Qual XQ Units PAM • Date Analyst <br /> Alkalinity as CaCO3 SM2320B-Titration <br /> Bicarbonate as 1 43.3 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 43.3 mg/L 2 20 03/09/22 0:00 jck <br /> Cation-Anion Balance Calculation <br /> Cation-Anion Balance -7.0 % 03/28/22 0:00 calc <br /> Sum of Anions 2.3 meq/L 03/28/22 0:00 calc <br /> Sum of Cations 2 meq/L 03/28/22 0:00 calc <br /> Chloride SM4500CI-E 1 <0.5 U mg/L 0.5 2 03/23/2218:43 mjj1 <br /> Conductivity @25C SM2510B 1 209 umhos/cm 1 10 03/09/22 8:17 jck <br /> Cyanide,total M335.4-Colonmetric w/distillation 0.5 <0.003 U mg/L 0.003 0.01 03/10/22 14:15 bls <br /> Fluoride SM450OF-C 1 0.23 B mg/L 0.15 0.35 03/21/2214:50 emk <br /> Hardness as CaCO3 SM2340B-Calculation 93 mg/L 0.2 5 03/28/22 0:00 calc <br /> (dissolved) <br /> Nitrate/Nitrite as N M353.2-H2SO4 preserved 1 0.137 mg/L 0.02 0.1 03/25/22 2:10 pjb <br /> pH(lab) SM45001-1+B <br /> pH 1 7.6 H units 0.1 0.1 03/09/22 0:00 jck <br /> pH measured at 1 21.3 C 0.1 0.1 03/09/22 0:00 jck <br /> Phosphorus,total M365.1 -Auto Ascorbic 1 <0.01 U mg/L 0.01 0.05 03/16/22 2:09 pjb <br /> Acid(digest) <br /> Residue,Filterable SM2540C 1 126 * mg/L 20 40 03/08/22 12:09 anc <br /> (TDS)@180C <br /> Residue,Non- SM2540D 1 <5 U mg/L 5 20 03/08/22 14:46 anc <br /> Filterable(TSS) <br /> @ 105C <br /> Sulfate D516-02/-07/-11-TURBIDIMETRIC 5 68.3 mg/L 5 25 03/17/2214:44 mjj1 <br /> TDS(calculated) Calculation 140 mg/L 03/28/22 0:00 calc <br /> TDS(ratio- Calculation 0.90 03/28/22 0:00 calc <br /> measured/calculated) <br /> REPIN.02.06.05.01 *Please refer to Qualifier Reports for details. <br /> L71828-2203281147 Page 11 of 26 <br />