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1Enseco <br /> A Corning Company <br /> *DUPLICATE CONTROL SAMPLE REPORT <br /> Volatile Organics by GC <br /> Concentration Accuracy Precision <br /> Analyte Spiked Measured Average(%) (RPD) <br /> DCSI DCS2 AVG DCS Limits DCS Limit <br /> Category: TPH-BTEX-S <br /> Matrix: SOIL <br /> QC Lot: 20 JUN 91-20A <br /> Concentration Units: ug/kg <br /> Benzene 5.0 5.05 5.69 5.37 107 75-123 12 13 <br /> Toluene 5.0 4.44 4.97 4.70 94 74-126 11 18 <br /> Gasoline 1000 1090 1130 1110 111 74-126 3.6 18 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br />