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ADZ Laboratories, Inc. • • - • - • <br /> 2773 Downhill Drive Steamboat Springs, CO 80487 (800)334-5493 - • • <br /> Alexco Water and Environment Inc. ACZ Project ID: L50767 <br /> METHODACZ ID WORKNUM PARAMETER <br /> L50767-03 NG469715 Chloride SM4500CI-E M2 Matrix spike recovery was low,the recovery of the <br /> associated control sample(LCS or LFB)was acceptable. <br /> WG469549 Cyanide,WAD SM4500-CN I,E-Colohmethc 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(<1 Ox MDL). <br /> WG470185 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(<1 Ox MDL). <br /> WG469437 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(<1 Ox MDL). <br /> WG468968 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 /> SM2540D Z3 Sample volume yielded a residue less than 2.5 mg <br /> WG469787 Sulfate D516-021-07-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 /> D516-021-07-Turbidimetric 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 /> REPAD.15.06.05.01 <br /> L50767-1904151056 Page 27 of 38 <br />