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1• <br /> NEI/GTEL Client ID BLA01CHVOB QUALITY CONTROL RESULTS <br /> Login Number, W7050359 Volatile Organics <br /> Method EPA 8020A <br /> Project ID (number) 970521-H2 <br /> Pro eft ID (name) CHEVRON/9-184811257 YOSEMITE WEST/MANTECA/CA Matrix __Aqueous <br /> Duplicate Sample Results <br /> Original Duplicate Acceptability <br /> Analyte Concentration Concentration RPD X Limits X <br /> EPA 8020A Units ug/L QC Batch 052897GC14-6 GTEL Sample ID W7050320-02 Client ID- Batch QC <br /> MTBE < 50 a < 50 a NA 20 <br /> Benzene 35 1 34 1 2 89 23 9 <br /> Toluene 97 5 95 4 2 18 27 2 <br /> Ethylbenzene 53 1 51 3 3 45 21 6 <br /> Xylenes (Total) 320 313 2 21 22 0 <br /> Notes <br /> NA - The concentration of the analyte is less than the reporting limit <br /> i <br /> NEI/GTEL Wichita, KS <br /> W7050359 5 <br />