2020-04-15_REVISION - M2012032 - Laserfiche WebLink

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Ouray Silver Mines Inc. Table 3 Technical Revision 11 Table 3.Groundwater Parameter List with Standards Parameter GW standard Method MDL Unit Aluminum,dissolved 5 M200.7 ICP 0.05 mg/L Antimony,dissolved report M200.8 ICP-MS 0.0004 mg/L Arsenic,dissolved 0.1 M200.8 ICP-MS 0.0002 mg/L Barium,dissolved report M200.7 ICP 0.007 mg/L Beryllium,dissolved 0.1 M200.8 ICP-MS 0.00008 mg/L Bicarbonate as CaCO3 report SM2320B-Titration 2 mg/L Boron,dissolved 0.75 M200.7 ICP 0.02 mg/L Cadmium,dissolved 0.001 M200.8 ICP-MS 0.00005 mg/L Calcium,dissolved report M200.7 ICP 0.1 mg/L Carbonate as CaCO3 report SM2320B-Titration 2 mg/L Cation-Anion Balance report Calculation % Chloride 250 SM4500CI-E 0.5 mg/L Chromium,dissolved 0.1 M200.8 ICP-MS 0.0005 mg/L Conductivity @25C report SM2510B 1 umhos/cm Copper,dissolved 0.009 M200.8 ICP-MS 0.0008 mg/L Cyanide,total 0.005 M335.4-Manual distillation 0.003 mg/L Fluoride 2 SM4500F-C 0.11 mg/L Hardness as CaCO3(dissolved) report Calculation mg/L Hydroxide as CaCO3 report SM2320B-Titration 2 mg/L Iron,dissolved 1 M200.7 ICP 0.03 mg/L Lead,dissolved 0.044 M200.8 ICP-MS 0.0001 mg/L Magnesium,dissolved report M200.7 ICP 0.2 mg/L Manganese,dissolved 1.672 M200.7 ICP 0.01 mg/L Mercury,dissolved 0.01 M245.1 CVAA 0.0002 mg/L Molybdenum,dissolved report M200.8 ICP-MS 0.0002 mg/L Nickel,dissolved 0.05 M200.7 ICP 0.008 mg/L Nitrate/Nitrite as N 100 M353.2-H2SO4 preserved 0.02 mg/L pH 6-9 SM4500H+B 0.1 units pH measured at report 0.1 C Phosphorus,total report M365.1-Automated Ascorbic Acid 0.01 mg/L Potassium,dissolved report M200.7 ICP 0.2 mg/L Residue,Filterable(TDS)@180C 400 SM2540C 20 mg/L Residue,Non-Filterable(TSS)@105C report SM2540D 5 mg/L Selenium,dissolved 0.005 M200.8 ICP-MS 0.0001 mg/L Silica,dissolved report M200.7 ICP 0.214 mg/L Silver,dissolved 0.0001 M200.8 ICP-MS 0.0001 mg/L Sodium,dissolved report M200.7 ICP 0.2 mg/L Sulfate 250 D516-02/-07/-11-Turbidimetric 1 mg/L Sum of Anions report Calculation meq/L Sum of Cations report Calculation meq/L TDS(calculated) none Calculation mg/L TDS(ratio-measured/calculated) none Calculation Thallium,dissolved report M200.8 ICP-MS 0.0001 mg/L Total Alkalinity report SM2320B-Titration 2 mg/L Uranium,dissolved report M200.8 ICP-MS 0.0001 mg/L Vanadium,dissolved 0.1 M200.7 ICP 0.005 mg/L Zinc,dissolved 0.713 M200.7 ICP 0.01 mg/L Page 1 3 26,2020