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July 31, 2007 <br />Panella Trucking <br />Quality Control - Organic <br />C, <br />Lab ID STK734832 <br />Customer : 3-9812 <br />Constituent <br />Method <br />Date/ID <br />Type <br />Units <br />Conc. <br />QC Data <br />DQO <br />Note <br />1,2,4-Trichlorobenzene <br />3550A <br />06/06/2007:S225 <br />MS <br />mg/kg <br />5.000 <br />54.3% <br />20-166 <br />(STK733647-08) <br />MSD <br />mg/kg <br />5.000 <br />45.8% <br />20-166 <br />MSRPD <br />mg/kg <br />0.42 <br />510.0 <br />8270C <br />07/13/2007:A <br />01-CCV <br />mg/L <br />80.00 <br />91.5% <br />80-120 <br />2,4,5 -Trichlorophenol <br />3550A <br />06/06/2007:S225 <br />Blank <br />mg/kg <br />ND <br /><1 <br />8270C <br />07/13/2007:A <br />01-CCV <br />mg/L <br />80.00 <br />101% <br />70-130 <br />2,4,6 -Trichlorophenol <br />3550A <br />06/06/2007:S225 <br />Blank <br />mg/kg <br />ND <br /><1 <br />LCS <br />mg/kg <br />10.00 <br />71.7% <br />20-162 <br />MS <br />mg/kg <br />10.00 <br />62.7% <br />20-162 <br />(STK733647-08) <br />MSD <br />mg/kg <br />10.00 <br />54.8% <br />20-162 <br />MSRPD <br />mg/kg <br />1 <br />0.79 <br />:510.0 <br />8270C <br />07/13/2007:A <br />01-CCV <br />mg/L <br />80.00 <br />96.2% <br />80-120 <br />Explanations <br />325 QC not within Acceptance Range (AR). Data could not be confirmed by reanalysis. Use results with <br />discretion. <br />360 CCV above Acceptance Range (AR). Samples which were non detect for this analyte were accepted. <br />435 Sample matrix may be affecting this analyte. Data was accepted based on the LCS or CCV recovery. <br />560 Surrogate percent recoveries not within the Acceptance Range (AR) due to suspected matrix interferences. <br />Definitions <br />Blank Method Blank - Prepared to verify that the preparation process is not contributing contamination to the samples. <br />LCS Laboratory Control Standard/Sample - Prepared to verify that the preparation process is not affecting analyte <br />recovery. <br />PDS Post Digestion Spike (ICP/GFAA) <br />MS/MSD Matrix Spikes - A random sample is spiked with a known amount of analyte. The recoveries are an indication o <br />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 <br />difference is an indication of precision for the preparation and analysis. <br />ICB Initial Calibration Blank - Analyzed to verify the instrument baseline is within criteria. <br />ICV Initial Calibration Verification - Analyzed to verify the instrument calibration is within criteria. <br />CCB Continuing Calibration Blank - Analyzed to verify the instrument baseline is within criteria. <br />CCV Continuing Calibration Verification - Analyzed to verify the instrument calibration is within criteria. <br />ND Non -detect - Result was below the DQO listed for the analyte. <br />DQO Data Quality Objective - This is the criteria against which the quality control data is compared. <br />STK734832: Quality Control Page 21 <br />