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AOZ Laboratories, Inc. <br /> 2773 Downhill Drive Steamboat Springs, CO 80487(800)334-5493 <br /> Ouray Silver Mines ACZ Sample ID: L69171-01 <br /> Project ID: Date Sampled: 10105121 15:30 <br /> Sample ID: RT20211005 Date Received: 10112121 <br /> Sample Matrix: Soil <br /> Wet Chemistry <br /> MethodParameter EPA Dilution Result Qual XQ <br /> Alkalinity(1312 DI) SM2320B-Titration <br /> Bicarbonate as 1 28.3 mg/L 2 20 10/29/21 0:00 eep <br /> CaCO3 <br /> Carbonate as CaCO3 1 <2 U mg/L 2 20 10/29/21 0:00 eep <br /> Hydroxide as CaCO3 1 <2 U mg/L 2 20 10/29/21 0:00 eep <br /> Total Alkalinity 1 288 * mg/L 2 20 10/29/21 0:00 eep <br /> Bromide(1312-DI) M300 0-Ion Chromatography 1 <0.05 U mg/L 0.05 025 11/12/21 2:26 krh <br /> Carbon,total organic SM5310B 1 1.3 B * mg/L 1 5 11/04/21 16:50 and <br /> (TOC)(1312-DI) <br /> Chloride(1312-DI) M300 0-Ion Chromatography 1 <0 4 U * mg/L 0.4 2 11/12/21 2:26 krh <br /> Conductivity @25C SM2510B 1 106 umhos/cm 1 10 10/29/21 16:52 eep <br /> (1312-DI) <br /> Fluoride(1312 DI) SM450OF-C 1 0.20 B mg/L 0.15 0.35 11/04/21 17-00 eep <br /> Hardness as CaCO3 SM2340B-Calculation 34.0 mg/L 0.2 5 12/02/21 0:00 calc <br /> (1312) <br /> Nitrate(1312 DI) Calculation NO3NO2 minus NO2 <0.02 U mg/L 0.02 0.1 12/02/21 0:00 calc <br /> Nitrate/Nitrite as N M353 2-Automated 1 <0 02 U mg/L 0.02 0.1 10/30/21 1:23 pjb <br /> (1312-DI) Cadmium Reduction <br /> Nitrite as N(1312-DI) M353 2-Automated 1 <0.01 U mg/L 0.01 0.05 10/30/21 1:23 pjb <br /> Cadmium Reduction <br /> Nitrogen,ammonia M350.1 Auto Salicylate 1 0.860 * mg/L 0.05 0.2 11/13/21 12:01 wtc <br /> (1312-DI) w/gas diffusion <br /> Phosphorus,ortho M365 1-Automated Ascorbic Acid 1 <0.01 U mg/L 0.01 0.05 10/29/21 23:53 pjb <br /> dissolved(1312-DI) <br /> Phosphorus,Total M3651-Auto Ascorbic Acid 1 0.104 mg/L 001 0.05 11/07/2122.44 syw <br /> (1312-DI) (digest) <br /> Residue,Filterable SM2540C 1 62 mg/L 20 40 10/29/21 18:04 eep <br /> (TDS)@180C(1312) <br /> Residue, Non-Filter SM2540D 1 <5 U mg/L 5 20 11/04/21 16:21 eep <br /> (TSS)@180C(1312- <br /> DI) <br /> Sulfate(1312-DI) M300 0-Ion Chromatography 1 18.8 mg/L 04 2 11/20/21 14.30 krh <br /> REPIN.02.06.05.01 *Please refer to Qualifier Reports for details <br /> L69171-2112031018 Page 5 of 25 <br />