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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: L71828-05 <br /> Project ID: Date Sampled: 03103122 13:05 <br /> Sample ID: GW-26 Date Received: 03107122 <br /> Sample Matrix: Groundwater <br /> Inorganic Prep <br /> meter EPA Method Dilution Result Qual XO Units MDL MI. <br /> Deb Analyst <br /> Cyanide,total M335.4-Manual Distillation 03/10/22 7:28 bls <br /> Phosphorus,total M365.1 -Auto Ascorbic 03/14/22 13:17 mrd <br /> Acid Digestion <br /> Metals Analysis <br /> 'Parameter- EPA Method Dilution Result Qual * Units MDL • Date Analyst <br /> Aluminum,dissolved M200.7 ICP 1 <0.05 U mg/L 0.05 0.25 03/16/22 16:54 wtc <br /> Antimony,dissolved M200.8 ICP-MS 1 0.00085 B mg/L 0.0004 0.002 03/15/22 15:02 mfm <br /> Arsenic,dissolved M200.8 ICP-MS 1 0.00027 B mg/L 0.0002 0.001 03/15/22 15:02 mfm <br /> Barium,dissolved M200.7 ICP 1 0.0597 mg/L 0.007 0.035 03/16/22 16:54 wtc <br /> Beryllium,dissolved M200.8 ICP-MS 1 <0.00008 U mg/L 0.00008 0.00025 03/15/22 15:02 mfm <br /> Boron,dissolved M200.7 ICP 1 <0.03 U mg/L 0.03 0.1 03/16/22 16:54 wtc <br /> Cadmium,dissolved M200.8 ICP-MS 1 0.000252 mg/L 0.00005 0.00025 03/15/22 15:02 mfm <br /> Calcium,dissolved M200.7 ICP 1 33.0 mg/L 0.1 0.5 03/16/22 16:54 wtc <br /> Chromium,dissolved M200.8 ICP-MS 1 <0.0005 U mg/L 0.0005 0.002 03/15/22 15:02 mfm <br /> Copper,dissolved M200.8 ICP-MS 1 <0.0008 U * mg/L 0.0008 0.002 03/15/22 15:02 mfm <br /> Iron,dissolved M200.7 ICP 1 <0.06 U mg/L 0.06 0.15 03/16/22 16:54 wtc <br /> Lead,dissolved M200.8 ICP-MS 1 <0.0001 U mg/L 0.0001 0.0005 03/15/22 15:02 mfm <br /> Magnesium,dissolved M200.7 ICP 1 2.62 mg/L 0.2 1 03/16/22 16:54 wtc <br /> Manganese,dissolved M200.7 ICP 1 <0.01 U mg/L 0.01 0.05 03/16/22 16:54 wtc <br /> Mercury,dissolved M245.1 CVAA 1 <0.0002 U mg/L 0.0002 0.001 03/11/22 14:01 mlh <br /> Molybdenum,dissolved M200.8 ICP-MS 1 0.00101 mg/L 0.0002 0.0005 03/15/22 15:02 mfm <br /> Nickel,dissolved M200.7 ICP 1 <0.008 U mg/L 0.008 0.04 03/16/22 16:54 wtc <br /> Potassium,dissolved M200.7 ICP 1 0.60 B mg/L 0.2 1 03/16/22 16:54 wtc <br /> Selenium,dissolved M200.8 ICP-MS 1 0.00040 mg/L 0.0001 0.00025 03/15/22 15:02 mfm <br /> Silica,dissolved M200.7 ICP 1 4.9 mg/L 0.2 1 03/16/22 16:54 wtc <br /> Silver,dissolved M200.8 ICP-MS 1 <0.0001 U mg/L 0.0001 0.0005 03/16/22 16:14 mfm <br /> Sodium,dissolved M200.7 ICP 1 2.30 mg/L 0.2 1 03/16/22 16:54 wtc <br /> Thallium,dissolved M200.8 ICP-MS 1 <0.0001 U mg/L 0.0001 0.0005 03/15/22 15:02 mfm <br /> Uranium,dissolved M200.8 ICP-MS 1 <0.0001 U mg/L 0.0001 0.0005 03/15/22 15:02 mfm <br /> Vanadium,dissolved M200.7 ICP 1 <0.01 U mg/L 0.01 0.025 03/18/22 20:18 jlw <br /> Zinc,dissolved M200.7 ICP 1 0.292 mg/L 0.02 0.05 03/16/22 16:54 wtc <br /> REPIN.02.06.05.01 'Please refer to Qualifier Reports for details. <br /> L71828-2203281147 Page 10 of 26 <br />