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AraZ Laboratories, Inc. - • <br /> 2773 Downhill Drive Steamboat Springs,CO 80487 (800)334-5493 - • • <br /> Alexco Water&Environmental Inc. ACZ Project ID: L50183 <br /> METHODACZ ID WORKNUM PARAMETER <br /> L50183-01 NG467432 Antimony,dissolved M200.8 ICP-MS Q5 Sample received with inadequate chemical preservation. <br /> Additional preservation performed by the laboratory. <br /> Arsenic,dissolved M200 8 ICP-MS Q5 Sample received with inadequate chemical preservation. <br /> Additional preservation performed by the laboratory. <br /> WG467461 Cyanide,WAD SM4500-CN I,E-Colorimetnc w/ M2 Matrix spike recovery was low,the recovery of the <br /> distillation associated control sample(LCS or LFB)was acceptable <br /> SM4500-CN I,E-Colodmetric w/ RA Relative Percent Difference(RPD)was not used for data <br /> distillation validation because the concentration of the duplicated <br /> sample is too low for accurate evaluation(<10x MDL) <br /> WG467432 Lead,dissolved M200 8 ICP-MS Q5 Sample received with inadequate chemical preservation <br /> Additional preservation performed by the laboratory <br /> WG467383 Mercury,dissolved M245.1 CVAA Q5 Sample received with inadequate chemical preservation. <br /> Additional preservation performed by the laboratory <br /> WG467891 Nitrate/Nitrite as N M353 2-H2SO4 preserved RA Relative Percent Difference(RPD)was not used for data <br /> validation because the concentration of the duplicated <br /> sample is too low for accurate evaluation(<10x MDL). <br /> WG467632 Phosphorus,total M365.1-Auto Ascorbic Acid RA Relative Percent Difference(RPD)was not used for data <br /> (digest) validation because the concentration of the duplicated <br /> sample is too low for accurate evaluation(<10x MDL). <br /> WG467269 Residue,Filterable(TDS)@180C SM2540C RA Relative Percent Difference(RPD)was not used for data <br /> validation because the concentration of the duplicated <br /> sample is too low for accurate evaluation(<1 Ox MDL). <br /> WG467240 Residue,Non-Filterable(TSS)@105C SM2540D RA Relative Percent Difference(RPD)was not used for data <br /> validation because the concentration of the duplicated <br /> sample is too low for accurate evaluation(<1 Ox MDL). <br /> WG467432 Silver,dissolved M200 8 ICP-MS Q5 Sample received with inadequate chemical preservation <br /> Additional preservation performed by the laboratory. <br /> WG467232 Sulfate D516-02/-07-Turbidimetric M3 The spike recovery value is unusable since the analyte <br /> concentration in the sample is disproportionate to the spike <br /> level The recovery of the associated control sample(LCS <br /> or LFB)was acceptable. <br /> WG467432 Thallium,dissolved M200 8 ICP-MS Q5 Sample received with inadequate chemical preservation <br /> Additional preservation performed by the laboratory. <br /> Uranium,dissolved M200 8 ICP-MS Q5 Sample received with inadequate chemical preservation <br /> Additional preservation performed by the laboratory. <br /> REPAD.15 06 05.01 <br /> L50183-1909231509 Page 22 of 31 <br />