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GTEL Client ID BLA01CHV08 QUALITY CONTROL RESULTS <br /> Login Number W6020162 Volatile Organics <br /> Project ID (number) 960207 Z3 Method EPA 8020 <br /> Project ID (name) CHEVRON/9 1848/1257 YOSEMITE WEST/MANTECA/CA Matrix Aqueous <br /> Calibration Verification Sample Summary <br /> Spike Check Sample QC Percent Acceptability Limits <br /> Analyte Amount Concentration Recovery Recovery <br /> EPA 8020 Units ug/L QC Batch 021596GCIO 5 <br /> Benzene 20 0 18 7 93 5 77-123% <br /> Toluene 20 0 19 3 96 5 77 5-122 5% <br /> Ethylbenzene 20 0 16 0 80 0 63-137% <br /> Xylenes (Total) 60 0 60 1 100 85-115% <br /> TPH as Gasoline 500 473 94 6 80-120% <br /> Notes <br /> QC check source Supelco #LA12389 <br /> GTEL Wichita KS <br /> W6020162 4 <br />