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Umiii+r� Laboratories, Inc. Steamboat Spnngs, CO 80487 (800) 334 -5493 Star Mine Operations LLC ACZ Project ID: L16817 ACZ ID WORKNUM PARAMETER METHOD QUAL DESCRIPTION L16817 -05 WG359586 Silica, total M200.7 ICP ZS Digestion procedures have the potential to trigger silica polymerization and precipitation, leading to low biased results. Silica chemistry is complex and polymerization kinetics are unpredictable. Dissolved and/or acid soluble silica analyses may provide more accurate measurements WG359610 Silver, dissolved M200.8 ICP -MS M2 Matrix spike recovery was low, the recovery of the associated control sample (LCS or LFB) was acceptable M200.8 ICP -MS ZA Poor recovery for Silver quality control is accepted due to low Silver solubility in samples, digestates, or extracts that do not contain sufficient Hydrochloric acid. WG359461 Cyanide, total M335 4 - Colonmetric w/ RA Relative Percent Difference (RPD) was not used for data distillation validation because the sample concentration is too low for accurate evaluation (< 1 Ox MDL) WG359569 Cyanide, WAD SM4500 -CN I- Colonmetnc w/ RA Relative Percent Difference (RPD) was not used for data distillation validation because the sample concentration is too low for accurate evaluation (< 1 Ox MDL). WG359706 Nitrate /Nitnte as N M353 2 - H2SO4 preserved RA Relative Percent Difference (RPD) was not used for data validation because the sample concentration is too low for accurate evaluation (< 1 Ox MDL) WG359297 Phosphorus, ortho dissolved M365 1 - Automated Ascorbic RA Relative Percent Difference (RPD) was not used for data Acid validation because the sample concentration is too low for accurate evaluation (< 1 Ox MDL). M365.1 - Automated Ascorbic ZU Analysis date /time preceeds filter date /time. A portion of Acid sample was filtered and analyzed prior to the creation of a Filter workgroup WG359813 Residue, Filterable (TDS) @180C SM2540C HC Initial analysis within holding time. Reanalysis was past holding time, which was required due to a QC failure during the initial analysis WG359517 Residue, Non - Filterable (TSS) @105C SM2540D RA Relative Percent Difference (RPD) was not used for data validation because the sample concentration is too low for accurate evaluation (< 1 Ox MDL). WG359562 Sulfate D516 -02 - Turbidimetric M3 The spike recovery value is unusable since the analyte concentration in the sample is disproportionate to the spike level. The recovery of the associated control sample (LCS or LFB) was acceptable. D516 -02 - Turbidimetnc ZU Analysis date /time preceeds filter date /time. A portion of sample was filtered and analyzed prior to the creation of a Fitter workgroup. REPAD.15.06.05.01 L16817- 1402281027 Page 45 of 49