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December 12, 2018 Lab ID : STK1856681 <br /> Musco Family Olive Environmental Customer A-11544 <br /> Quality Control - Inorganic <br /> Definition <br /> MSD :Matrix Spike Duplicate of MS/MSD pair-A random sample duplicate is spiked with a known amount of analyted.The recoveries <br /> are an indication of how that sample matrix affects analyte recovery. <br /> Dup :Duplicate Sample-A random sample with each batch is prepared and analyzed in duplicate.The relative percent difference is an <br /> indication of precision for the preparation and analysis. <br /> MSRPD :MS/MSD Relative Percent Difference(RPD)-The MS relative percent difference is an indication of precision for the preparation <br /> and analysis. <br /> ND :Non-detect-Result was below the DQO listed for the analyte. <br /> <'/4 :High Sample Background-Spike concentration was less than one forth of the sample concentration. <br /> DQO :Data Quality Objective-This is the criteria against which the quality control data is compared. <br /> Explanation <br /> 435 :Sample matrix may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. <br /> 440 :Sample nonhornogeneity may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. <br /> Page 10 of 11 <br />