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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: L73468-04 <br /> Project ID: Date Sampled: 05125122 14:57 <br /> Sample ID: GW-0 Date Received: 05126122 <br /> Sample Matrix: Groundwater <br /> Wet Chemistry <br /> Parameter EPA Method Dilution Result Qual J66 Units MDL . <br /> Alkalinity as CaCC3 SM2320B-Titration <br /> Bicarbonate as 1 3.3 B 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 3.3 B mg/L 2 20 06/01/22 0:00 jck <br /> Cation-Anion Balance Calculation <br /> Cation-Anion Balance n/a % 06/15/22 0 00 calc <br /> Sum of Anions < U meq/L 06/15/22 0:00 calc <br /> Sum of Cations < U meq/L 06/15/22 0:00 calc <br /> Chloride SM4500CI-E 1 <0.5 U mg/L 0.5 2 05/31/2216:35 bls <br /> Conductivity @25C SM2510B 1 2 B umhos/cm 1 10 06/01/22 3:54 jck <br /> Cyanide,total M335 4-Colorimetric w/distillation 05 <0.003 U mg/L 0 003 0.01 06/06/22 10 26 bls <br /> Fluoride SM450OF-C 1 <0.15 U mg/L 0.15 0.35 06/06/2218:10 emk <br /> Hardness as CaCO3 SM2340B-Calculation 0.474 B mg/L 0.2 5 06/15/22 0.00 calc <br /> (dissolved) <br /> Nitrate/Nitrite as N M353 2-H2SO4 preserved 1 <0.02 U * mg/L 0.02 01 06/04/22 22:45 pjb <br /> pH(lab) SM4500H+B <br /> pH 1 6.5 H units 0.1 01 06/01/22 0.00 jck <br /> pH measured at 1 21.7 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 4:09 pjb <br /> (digest) <br /> Residue, Filterable SM2540C 1 <20 U mg/L 20 40 05/31/22 15.27 emk <br /> (TDS)@180C <br /> Residue,Non- SM2540D 1 <5 U mg/L 5 20 06/01/22 14.02 anc <br /> Filterable(TSS) <br /> @ 105C <br /> Sulfate D516-02/-07/-11-TURBIDIMETRIC 1 <1 U mg/L 1 5 05/29/2211:50 mjj1 <br /> TDS(calculated) Calculation 2.2 mg/L 06/15/22 0:00 calc <br /> TDS(ratio- calculation n/a 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 9 of 24 <br />