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A Corning Company <br /> • DUPLICATE CONTROL SAMPLE REPORT <br /> Volatile Organics by GC <br /> Concentration Accuracy Precision <br /> Analyte Spiked Measured Average M (RPD) <br /> DCS1 DCS2 AVG DCS Limits DGS Limit <br /> Category: TPH-BTEX-S <br /> Matrix: SOIL <br /> QC Lot: 26 JUN 91-20A <br /> Concentration Units: ug/kg <br /> Benzene 5.0 4.63 4.50 4.56 91 75-123 2.8 13 <br /> Toluene 5.0 4.30 4.01 4.16 83 14-126 7.0 18 <br /> Gasoline 1000 929 885 907 91 74-126 4.9 18, <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> • <br />