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Ouray Silver Mines Inc.Technical Revision 09TablesTable 6. Groundwater Parameter List with StandardsParameter GW standard Method MDL UnitAluminum, dissolved 5 M200.7 ICP 0.03 mg/LAntimony, dissolved report M200.8 ICP-MS 0.0004 mg/LArsenic, dissolved 0.1 M200.8 ICP-MS 0.0002 mg/LBarium, dissolved report M200.7 ICP 0.003 mg/LBeryllium, dissolved 0.1 M200.8 ICP-MS 0.00005 mg/LBicarbonate as CaCO3 reportSM2320B - Titration 2 mg/LBoron, dissolved 0.75 M200.7 ICP 0.01 mg/LCadmium, dissolved 0.001 M200.8 ICP-MS 0.0001 mg/LCalcium, dissolved report M200.7 ICP 0.1 mg/LCarbonate as CaCO3 report SM2320B - Titration 2 mg/LCation-Anion Balance report Calculation %Chloride 250 SM4500Cl-E 0.5 mg/LChromium, dissolved 0.1 M200.8 ICP-MS 0.0005 mg/LConductivity @25C report SM2510B 1 umhos/cmCopper, dissolved0.009M200.8 ICP-MS 0.0005 mg/LCyanide, total 0.005 M335.4 - Manual distillation 0.003 mg/LFluoride 2 SM4500F-C 0.05 mg/LHardness as CaCO3 (dissolved) report Calculation 0.2 mg/LHydroxide as CaCO3 report SM2320B - Titration 2 mg/LIron, dissolved 1 M200.7 ICP 0.02 mg/LLead, dissolved 0.044 M200.8 ICP-MS 0.0001 mg/LMagnesium, dissolved report M200.7 ICP 0.2 mg/LManganese, dissolved 1.672 M200.7 ICP 0.005 mg/LMercury, dissolved 0.01M245.1 CVAA 0.0002 mg/LMolybdenum, dissolved report M200.8 ICP-MS 0.0005 mg/LNickel, dissolved 0.05 M200.7 ICP 0.008 mg/LNitrate/Nitrite as N 100 M353.2 - H2S04 preserved 0.02 mg/LpH 6-9 0.1 unitspH measured at report 0.1 C