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Enseco <br /> A Coming Company <br /> DUPLICATE CONTROL SAMPLE REPORT <br /> Volatile Organics by GC <br /> i <br /> Concentration Accuracy Precision <br /> Analyte Spiked Measured Average RPD <br /> DCS1 DCS2 AVG DCS. Limits DCS Limit <br /> Category: TPH-BTEX-S <br /> Matrix: SOIL <br /> QC Lot: 28 JUN 91-20A <br /> Concentration Units: ug/kg <br /> Benzene 5.0 4.77 4.69 4.73 95 75-123 1.7 13 <br /> Toluene 5.0 5.08 4.91 5.00 100 74-126 3.4 18 <br /> Gasoline 1000 905 909 907 91 74-126 0.4 18 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> w <br />