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ACZ Laboratories, Inc. <br /> 2773 Downhill Drive Steamboat Springs, CO 80487(800)334-5493 <br /> Ouray Silver Mines ACZ Sample ID: L67252-01 <br /> Project ID: Date Sampled: 07120121 09:50 <br /> Sample ID: GW-3R Date Received: 07121121 <br /> Sample Matrix: Groundwater <br /> Wet Chemistry <br /> MethodParameter EPA i • ► - ! A <br /> Alkalinity as CaCO3 SM2320B-Titration <br /> Bicarbonate as 1 30.5 mg/L 2 20 07/28/21 0:00 emk <br /> CaCO3 <br /> Carbonate as CaCO3 1 <2 U mg/L 2 20 07/28/21 0:00 emk <br /> Hydroxide as CaCO3 1 <2 U mg/L 2 20 07/28/21 0:00 emk <br /> Total Alkalinity 1 30.5 mg/L 2 20 07/28/21 0:00 emk <br /> Cation-Anion Balance Calculation <br /> Cation-Anion Balance 3.0 % 08/09/21 0:00 calc <br /> Sum of Anions 1.6 meq/L 08/09/21 0:00 calc <br /> Sum of Cations 1.7 meq/L 08/09/21 0:00 calc <br /> Chloride SM4500CI-E 1 <0.5 U mg/L 0.5 2 08/04/2115:23 syw <br /> Conductivity @25C SM2510B 1 181 umhos/cm 1 10 07/28/21 22:22 emk <br /> Cyanide,total M335.4-Colorimelric w/distillation 0.5 <0.003 U mg/L 0.003 0.01 08/03/21 13:21 and <br /> Fluoride SM450OF-C 1 0.21 B mg/L 0.15 0.35 07/29/2115:22 eep <br /> Hardness as CaCO3 SM2340B-Calculation 77 mg/L 0.2 5 08/09/21 0:00 calc <br /> (dissolved) <br /> Nitrate/Nitrite as N M353.2-H2SO4 preserved 1 0.266 mg/L 0.02 0.1 07/29/21 1:28 pjb <br /> pH(lab) SM4500H•B <br /> pH 1 7.8 H units 0.1 0.1 07/28/21 0:00 emk <br /> pH measured at 1 22.4 C 0.1 0.1 07/28/21 0:00 emk <br /> Phosphorus,total M365.1 -Auto Ascorbic 1 <0.01 U mg/L 0.01 0.05 07/31/21 2:46 pjb <br /> Acid(digest) <br /> Residue,Filterable SM2540C 1 108 mg/L 20 40 07/21/21 19:46 jck <br /> (TDS)@180C <br /> Residue,Non- SM2540D 1 5.0 B * mg/L 5 20 07/22/21 14:21 scd <br /> Filterable(TSS) <br /> @105C <br /> Sulfate D516-02/-07/-11-TURBIDIMETRIC 5 46.8 * mg/L 5 25 08/03/21 8:52 syw <br /> TDS(calculated) Calculation 105 mg/L 08/09/21 0:00 calc <br /> TDS(ratio- Calculation 1.03 08/09/21 0:00 calc <br /> measured/calculated) <br /> REPIN.02.06.05.01 *Please refer to Qualifier Reports for details. <br /> L67252-2108091440 Page 3 of 17 <br />