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NEI/GTEL Client ID: EMC05CHV13 QUALITY CONTROL RESULTS <br /> Login Number: W7O5O44O Volatile Organics <br /> Project ID (number): 22560-203.002 Method: EPA 8020A <br /> Project ID (name): CHEVRON PIPELINE/MT VIEW TOWNNHOMES/TRACY/CA Matrix: Aqueous <br /> Laboratory Control Sample (LCS) and Laboratory Control Duplicate Results <br /> Spike LCS LCS LCS Duplicate LCS Duplicate Acceptability Limits <br /> Analyte Amount Concentration Recovery, % Concentration Recovery, % RPD. % RPD, % Recovery. % <br /> EPA 8020A Units: ug/L QC Batch:O6O397GC17-9 <br /> Benzene 2010 20:2 101. 19.8 99.0 2.00 20 39-1501'. <br /> Toluene 20.0 19.2 96.0 18.7 93.5 2.64 20 46-148% <br /> Ethylbenzene 20.0 20:2 101, 19.7 98.5 2.51 20 32-150%' <br /> ..... ..........:.::..,...:. <br /> Xylenes (Total) 60.0 60.2 100. 58.8 98.0 2.02 20 51-145% <br /> Notes: <br /> NEI/GTEL Wichita, KS <br /> W7050440:7 <br />