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Enseco <br /> Corning Environmental ServiCes <br /> DUPLICATE CONTROL SAMPLE REPORT <br /> Hydrocarbon Work Cell <br />' Concentration Accuracy Precision <br /> Analyte Spiked Measured Average() ((RPO <br /> QCS1 DCS2 AVG DCS Limits QCS L mit <br /> 1 <br /> Category: TPH-BTEX-A <br /> Matrjx: AQUEOUS <br /> QC Lot: 20 JUN 94-20A <br /> Concentration Units: ug/L <br /> Benzene 5.00 4.14 4.18 4.16 83 79-121 1.1 10.0 <br /> Toluene 1000 1010 1000 1000 100 80-117 0.6 10.0 <br />' Gasoline <br />' Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> 1 <br /> 1 " <br />