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NEI/GTEL Client ID BLAO1CHVO8 QUALITY CONTROL RESULTS <br /> Login Number W7060309 Volatile Organics <br /> �ro3ect ID {number) 97061E F1 Method EPA 8020A <br /> pro ect ID (name) CHEVRON/9 4275/2905 W BENJAMIN HOLT DR/STOCKTON/CA Matrix A ueous <br /> Laboratory Control Sample (LCS) and Laboratory Control Duplicate Results <br /> Spike LCS LCS LCS Duplicate LCS Duplicate Acceptability Limits <br /> Analyte Amount Concentration Recovery % Concentration Recovery % RPD % RPD x Recovery % <br /> EPA 8O20A Units ug/L QC Batch 063097GCIO-9 <br /> Benzene 20 0 16 2 81 0 16 9 84 5 4 23 20 39-15DX <br /> Toluene 20 0 15 6 78 0 16 5 82 5 5 61 20 46-148% <br /> Ethyl benzene 20 0 16 8 84 0 17 6 88 0 4 65 20 32-160% <br /> Xylenes (Total) 60 0 51 7 86 2 54 0 90 0 4 31 20 51-145% <br /> Notes <br /> • <br /> NEI/GTEL Wichita, KS <br /> W7060309 7 <br />