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a s > <br /> ACZ Laboratories, Inc. <br /> 2773 Downhill Drive Steamboat Springs, CO 80487(800)334-5493 <br /> Ouray Silver Mines ACZ Sample ID: L73468-03 <br /> Project ID: Date Sampled: 05125122 14:11 <br /> Sample ID: GW-3R Date Received: 05/26/22 <br /> Sample Matrix: Groundwater <br /> Wet Chemistry <br /> Parameter EPA Method Dikition Resuft Quall X0 Units MDL1+ Date Anallyst <br /> Alkalinity as CaCO3 SM2320B-Titration <br /> Bicarbonate as 1 35.2 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 35.2 mg/L 2 20 06/01/22 0:00 jck <br /> Cation-Anion Balance Calculation <br /> Cation-Anion Balance 2.3 % - 06/15/22 0:00 calc <br /> Sum of Anions 2.1 meq/L 06/15/22 0:00 calc <br /> Sum of Cations 2.2 meq/L 06/15/22 0:00 calc <br /> Chloride SM4500CI-E 1 0.73 B mg/L 0.5 2 05/31/2216:34 bls <br /> Conductivity @25C SM2510B 1 231 umhos/cm 1 10 06/01/22 3:48 jck <br /> Cyanide,total M335 4-Colonmetric w/distillation 0.5 <0.003 U mg/L 0.003 0.01 06/06/22 10:25 bls <br /> Fluoride SM450OF-C 1 0.25 B mg/L 015 0.35 06/06/2218:05 emk <br /> Hardness as CaCO3 SM2340B-Calculation 100 mg/L 0.2 5 06/15/22 0.00 calc <br /> (dissolved) <br /> Nitrate/Nitrite as N M353 2-H2SO4 preserved 1 0.756 mg/L 002 0.1 06/04/22 22:43 pjb <br /> pH(lab) SM4500H+B <br /> pH 1 7.7 H units 0.1 0.1 06/01/22 0:00 jck <br /> pH measured at 1 21.5 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 001 0.05 06/04/22 4:07 pjb <br /> (digest) <br /> Residue, Filterable SM2540C 1 150 mg/L 20 40 05/31/22 15.25 emk <br /> (TDS)@180C <br /> Residue, Non- SM2540D 1 <5 U * mg/L 5 20 06/01/22 13:59 anc <br /> Filterable(TSS) <br /> @ 105C <br /> Sulfate D516-021-07/-11-TURBIDIMETRIC 5 67.0 mg/L 5 25 05/29/22 12:55 mjl1 <br /> TDS(calculated) Calculation 139 mg/L 06/15/22 0.00 calc <br /> TDS(ratio- Calculation 1.08 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 7 of 24 <br />