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b — <br /> c .x. <br /> K <br /> Enseco <br /> A C—na C—ip y <br /> DUPLICATE CONTROL SAMPLE REPORT <br /> Volatile Organics by GC <br /> Concentration Accuracy Precision <br /> Analyte Spiked Measured Average(% RPD) <br /> DCS1 DCS2 AVG DCS limits D S Limit <br /> Category: TPH-BTEX-A <br /> Matrix: AQUEOUS <br /> QC Lot:' 28 FEB 91-A <br /> ;,. Concentration Units: ug/L <br /> Benzene 5.0 4.21 4.40 4.30 86 82-112 4.4 11 <br /> Toluene 5.0 4.88 5.18 5.03 101 81-114 6.0 13 <br /> Gasoline 500 580 558 569 114 81-114 3.9 13 <br /> µ+ <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> 1-. <br /> i <br /> t� <br /> t <br /> t<� <br /> E <br /> { <br /> i - <br /> i. <br />