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GTEL Client ID GTROICHV08 QUALITY CONTROL RESULTS <br /> WLogin Number W6120345 Volatile Organics <br /> roject ID (number) 5297 85 Method EPA 8020A <br /> Project ID (name) CHEVRON/9-0959/103 W 11TH STREET/TRACY/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 122496GC17-1 <br /> Benzene 20 0 17 6 88 0 77-123% <br /> Toluene 20 0 16 7 83 5 77 5-122 5% <br /> Ethylbenzene 20 0 16 3 81 S 63-137% <br /> Xylenes (Total) 60 0 51 9 86 5 85-115% <br /> TPH as Gasollne 500 554 1.11 80-1.20% <br /> Notes <br /> QC check source Supelco #LA12389 <br /> i <br /> NEI/GTEL Wichita KS <br /> W6120345 4 <br />