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AraZ Laboratories, Inc. <br /> 2773 Downhill Drive Steamboat Springs, CO 80487(800)334-5493 <br /> Ouray Silver Mines ACZ Sample ID: L73468-01 <br /> Project ID: Date Sampled: 05/25/22 12:13 <br /> Sample ID: GW-26 Date Received: 05126122 <br /> Sample Matrix: Groundwater <br /> Wet Chemistry <br /> EPA Method DIW� Rest#ll(��,�Quall XQ Units MDL POLs. <br /> Alkalinity as CaCO3 SM2320B-Titration <br /> Bicarbonate as 1 34.5 mg/L 2 20 06/01/22 0:00 Ick <br /> CaCO3 <br /> Carbonate as CaCO3 1 <2 U mg/L 2 20 06/01/22 0:00 Ick <br /> Hydroxide as CaCO3 1 <2 U mg/L 2 20 06/01/22 0:00 Ick <br /> Total Alkalinity 1 34.5 mg/L 2 20 06/01/22 0 00 Ick <br /> Cation-Anion Balance Calculation <br /> Cation-Anton Balance 0.0 % 06/15/22 0-00 calc <br /> Sum of Anions 2.4 meq/L 06/15/22 0:00 calc <br /> Sum of Cations 2.4 meq/L 06/15/22 0:00 calc <br /> Chloride SM4500CI-E 1 0.81 B * mg/L 0.5 2 05/31/2216:33 bls <br /> Conductivity @25C SM2510B 1 251 umhos/cm 1 10 06/01/22 3:32 tck <br /> Cyanide,total M335 4-Colorimetric w/distillation 0.5 <0.003 U mg/L 0.003 0.01 06/06/22 10:21 bls <br /> Fluoride SM450OF-C 1 0.22 B mg/L 0.15 0.35 06/06/2217:48 emk <br /> Hardness as CaCO3 SM2340B-Calculation 112 mg/L 0.2 5 06/15/22 0.00 calc <br /> (dissolved) <br /> Nitrate/Nitrite as N M353 2-H2SO4 preserved 1 0.824 * mg/L 0.02 0.1 06/04/22 22:41 pjb <br /> pH(lab) SM45001-1+B <br /> pH 1 7.7 H units 0.1 0.1 06/01/22 0.00 Ick <br /> pH measured at 1 21.8 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 06/04/22 4:00 pjb <br /> (digest) <br /> Residue, Filterable SM2540C 1 164 mg/L 20 40 05/31/22 15:22 emk <br /> (TDS)@180C <br /> Residue,Non- SM2540D 1 <5 U mg/L 5 20 06/01/22 13:51 anc <br /> Filterable(TSS) <br /> @ 105C <br /> Sulfate D516-02/-07/-11-TURBIDIMETRIC 5 792 mg/L 5 25 05/29/22 12:53 mjJ1 <br /> TDS(calculated) Calculation 155 mg/L 06/15/22 0:00 calc <br /> TDS(ratio- Calculation 1.06 06/15/22 0:00 calc <br /> measured/calculated) <br /> REPIN.02 06.05.01 `Please refer to Qualifier Reports for details. <br /> L73468-2206151327 Page 3 of 24 <br />