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NEI/GTEL Client ID BLAO1CHV08 QUALITY CONTROL RESULTS Volatile Organics <br /> Login Number W7060309 Method EPA 8020A <br /> �ro0ect ID (number) 970618-F1 <br /> Pro ect ID (name) CHEVRON/9 4275/2905 W BENJAMIN HOLT DR/STOCKTON/CA Matrix A ueous <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 063097GCIO-1 <br /> Benzene 20 0 19 5 97 5 77-123X <br /> Toluene 20 0 18 7 93 5 77 5-122 5% <br /> Ethylbenzene 20 0 19 6 98 0 63-137% <br /> Xylenes (Total) 60 0 60 4 101 85-115% <br /> TPH as Gasoline 500 459 91 8 80-120% <br /> Notes <br /> QC check source Supelco #LA12389 <br /> NEI/GTEL Wichita KS <br /> W7060309 4 <br />