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GTEL Client ID BLA01CHV08 QUALITY CONTROL RESULTS <br /> Login Number W6110559 Volatile Organics <br /> Project ID (number) 961126-A2 Method EPA 8020A <br /> Project ID (name) CHEVRON/9-0342/1347 S EL DORADO ST/STOCKTON/CA Matrix Aqueous <br /> Calibration Verification Sample Summary <br /> Spike Check Sample QC Percent Acceptability Limits <br /> Analyte Amount Concentration Recovery Recovery <br /> EPA 8020A Units ug/L QC Batch 120696GC10-4 <br /> Benzene 20 0 17 9 89 5 77-1231 <br /> Toluene 20 0 17 4 87 0 77 5-122 5% <br /> Ethylbenzene 20 0 17 3 86 5 63-1371 <br /> Xylenes (Total) 60 0 54 0 90 0 85-115% <br /> TPH as Gasoline 500 4.50 90-0 80-1201 <br /> Notes <br /> QC check source Supelco #LA12389 <br /> I <br /> Ni I<<,rl ! Wi0i)[ j K) <br />