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January 08, 2007 <br />San Joaquin County Solid Waste <br />Quality Control - Organic <br />Lab ID STK650837 <br />Customer : 3-2956 <br />Constituent <br />Method <br />Date/ID <br />Type <br />Units <br />Conc. <br />QC Data <br />DQO <br />Note <br />1,1,1 -Trichloroethane <br />12/26/2006:A233 <br />Blank <br />ug/L <br />ND <br /><0.5 <br />1,1,2 -Trichloroethane <br />Blank <br />ug/L <br />ND <br />< 1 <br />Trichloroethylene <br />Blank <br />ug/L <br />ND <br /><0.5 <br />LCS <br />ug/L <br />41.67 <br />108% <br />65-131 <br />MS <br />ug/L <br />41.67 <br />118% <br />58-133 <br />(STK650805-02) <br />MSD <br />ug/L <br />41.67 <br />120% <br />58-133 <br />MSRPD <br />ug/L <br />1.5% <br /><_ 18.4 <br />Trichlorofluoromethane <br />Blank <br />ug/L <br />ND <br /><0.5 <br />1,2,3-Trichloropropane <br />Blank <br />ug/L <br />ND <br />< 1 <br />1,2,4-Trimethylbenzene <br />Blank <br />ug/L <br />ND <br /><0.5 <br />1,3,5-Trimethylbenzene <br />Blank <br />ug/L <br />ND <br /><1 <br />Vinyl Acetate <br />Blank <br />ug/L <br />ND <br /><10 <br />Vinyl Chloride <br />Blank <br />ug/L <br />ND <br /><0.5 <br />Xylenes m,p <br />Blank <br />ug/L <br />ND <br /><1 <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 />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 />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 />STK650837: Quality Control Page 5 <br />