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c� <br /> ;EnSeco <br /> ,­,DUPLICATE CONTROL SAMPLE REPORT <br /> Hydrocarbon Work Cell <br /> r <br /> Concentration Accuracy Precision <br /> Analyte Spiked Measured Average(%) {RPD) <br /> OCS1 DCS2 AVG DCS !Limits DCS Limit <br /> �+ Category: TPH-BTEX-S <br /> Matrix: SOIL <br /> QC Lot: 23 SEP 91-14A <br /> Concentration Units: ug/kg <br /> Benzene 5.0 5.12 4.91 5.02 100 ;1-121 4.2 12 <br /> , <br /> Toluene <br /> 5.0 4.97 4.89 4.93 99 71-116 1.6 15 <br /> Gasoline 1000 921 894 908 91 81-117 3.0 21 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> j <br /> I <br /> 3 <br /> i,i <br />