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GTEL Client ID QUALITY CONTROL RESULTS <br /> Logon Number C4080161 Volatile Organics <br /> Project ID (number) 020200026 Method EPA 8020 <br /> ro ect ID (name) Sears/#1288/Stockton CA Matrix Soil <br /> Matrix Spoke and Matrix Spike Duplicate Results <br />! Matrix Matrix Matrix Spike Matrix Spike <br /> Original Spike Spike Spike Duplicate Duplicate Acceptability Limits <br /> Analyte Concentration Amount Concentration Recovery % Concentration Recovery X RPO % RPD % Recovery X <br /> EPA 8020 GTEL Sample ID 04080140 01 Spike ID F081194-1 pup ID F081194-2 <br /> Units mg/kq mg/kAnalysis Date 11-AUG-94 11-AUG 94 11-AUG 94 Client ID Batch QC <br /> Benzene < 0 0050 0 0500 0 0498 99 6 0 0382 76 4 26 4 40 48 8-129% <br /> Toluene < 0 0050 0 0500 0 0493 98 4 0 0378 75 4 26 5 40 52-123% <br /> Ethylbenzene < 0 0050 0 0500 0 0473 94 6 0 0349 69 8 30 2 40 55 4-122% <br /> Xylenes (Total) < 0 015 0 150 0 145 96 5 0 107 71 1 30 3 _ 40 55 1-130% <br /> Notes <br /> GTEL Concord. CA G T E L <br /> C4080161 1 LABORATORIES N INC <br />