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NEI/GTEL Client ID BLA01CHV08 QUALITY CONTROL RESULTS <br /> Login Number W7050359 Volatile Organics <br /> Method EPA 8020A <br /> Project ID (number). 970521 H2 <br /> Project ID (name) CHEVRON/9 1848/1257 YOSEMITE WEST/MANTECA/CA Matrix A ueou5 <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 052897GC14-1 <br /> Benzene 20 0 17 9 89 5 77 5-122 <br /> 77 5-122 <br /> Toluene 20 0 20 2 101 5% <br /> EthylUenzene 20 0 17 4 87 0 63-137 <br /> Xylenes (Total) 60 0 58 3 97 2 85-115% <br /> TPH as Gasoline 500 541 108 80-120% <br /> Notes <br /> QC check source Supelco #LA12389 <br /> i <br /> NEI/GTEL Wichita KS <br /> W7050359 4 <br />