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GTEL Client ID GTROlCHV08 QUALITY CONTROL RESULTS <br />ogin Number W5110513 Volatile Organics <br />roject ID (number) 5297 85 Method EPA 8020 <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 <br />Amount Concentration <br />Recovery <br />Recovery <br />EPA 8020 Units ug/L <br />QC Batch 20395GC5 1 <br />Benzene <br />20 0 22 4 <br />112 <br />77-123% <br />Toluene <br />20 0 22 1 <br />111 <br />77 5-122 5% <br />Ethylbenzene <br />20 0 21 6 <br />103 <br />63-137% <br />Xylenes (Total) <br />60 0 64 4 <br />107 <br />85-115% <br />Notes <br />QC check source Supelco #LA123B9 <br />GTEL Wichita, KS <br />W5110513 4 <br />