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Ll <br />C <br />August 13, 2014 Lab ID : STK1437409 <br />Forward Inc. Customer : 3-8692 <br />Quality Control - Inorganic <br />Definition <br />Blank : Method Blank - Prepared to verify that the preparation process is not contributing contamination to the samples. <br />RgBlk : Method Reagent Blank - Prepared to correct for any reagent contributions to sample result. <br />LCS : Laboratory Control Standard/Sample - Prepared to verify that the preparation process is not affecting analyte recovery. <br />Ms : Matrix Spikes - A random sample is spiked with a known amount of analyte. The recoveries are an indication of how that sample <br />matrix affects analyte recovery. <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 />O : Data Quali Objective - This is the criteria against which the uali control data is compared. <br />Explanation <br />440 : Sample nonhomogeneity may be affecting this analyte. Data was accepted based on the LCS or CCV recovery. <br />735 : Dilution water exceeded DO uptake method criteria <br />Page 9 of 9 <br />