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GTEL Client ID GTROlCHV08 QUALITY CONTROL RESULTS <br />Login Number W6060243 Volatile Organics <br />Project 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 />Notes <br />QC check source Supelco #LA12369 <br />GTEL Wichita KS <br />W6060243 4 <br />Spike <br />Check Sample <br />QC Percent <br />Acceptability Limits <br />Analyte <br />Amount <br />Concentration <br />Recovery <br />Recovery <br />EPA 8020A Units ug/L <br />QC Batch 062196GC10-2 <br />Benzene <br />20 0 <br />17 2 <br />86 0 <br />77-123% <br />Toluene <br />20 0 <br />18 1 <br />90 5 <br />77 5-122 5% <br />Ethylbenzene <br />20 0 <br />17 7 <br />88 5 <br />63-137% <br />Xylenes (Total) <br />60 0 <br />55 1 <br />91 8 <br />85-115% <br />TPH as Gaso,line <br />500 <br />472 <br />94 4 <br />80-120% <br />Notes <br />QC check source Supelco #LA12369 <br />GTEL Wichita KS <br />W6060243 4 <br />