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July 25, 2014 Lab ID : STK1436562 Forward Inc. Customer : 3-8692 Quality Control - Inorganic Definition CCV : Continuing Calibration Verification - Analyzed to verify the instrument calibration is within criteria. CCB : Continuing Calibration Blank - Analyzed to verify the instrument baseline is within criteria. Blank : Method Blank - Prepared to verify that the preparation process is not contributing contamination to the samples. RgBlk : Method Reagent Blank - Prepared to correct for any reagent contributions to sample result. LCS : Laboratory Control Standard/Sample - Prepared to verify that the preparation process is not affecting analyte recovery. MS : Matrix Spikes - A random sample is spiked with a known amount of analyte. The recoveries are an indication of how that sample matrix affects analyte recovery. MSD :Matrix Spike Duplicate of MS/MSD pair -A random sample duplicate is spiked with a known amount of analyted. The recoveries are an indication of how that sample matrix affects analyte recovery. Dup : Duplicate Sample - A random sample with each batch is prepared and analyzed in duplicate. The relative percent difference is an indication of precision for the preparation and analysis. MSRPD : MS/MSD Relative Percent Difference (RPD) - The MS relative percent difference is an indication of precision for the preparation and analysis. ND : Non -detect - Result was below the DQO listed for the analyte. <'/4 : High Sample Background - Spike concentration was less than one forth of the sample concentration. O : Data ali Objective - This is the criteria against which the uali control data is com ared. Explanation 435 : Sample matrix may be affecting this analyte. Data was accepted based on the LCS or CCV recovery. 440 : Sample nonhomogeneity may be affecting this analyte. Data was accepted based on the LCS or CCV recovery. 735 : Dilution water exceeded DO uptake method criteria 11, Page 7 of 7