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Enseco <br />DUPLICATE CONTROL SAMPLE REPORT <br />Volatile Organics by GC/MS <br />Calculations are performed before rounding to avoid round -off errors in calculated results. <br />17� <br />E <br />Concentration <br />Accuracy <br />Precision <br />Analyte <br />Spiked <br />Measured <br />Average(%) <br />(RPD) <br />DCS1 <br />DCS2 <br />AVG <br />DCS Limits <br />DCS Limit <br />Category: 8240-S <br />Matrix: SOIL <br />QC Lot: 19 MAY 89-01A <br />Concentration Units: ug/kg <br />1,1-Dichloroethene <br />5000 <br />5050 <br />4590 <br />4820 <br />97 60-128 <br />9.5 <br />18 <br />Trichloroethene <br />5000 <br />4150 <br />4700 <br />4420 <br />89 68-113 <br />12 <br />20 <br />Benzene <br />5000 <br />4580 <br />4920 <br />4750 <br />95 68-119 <br />7.2 <br />21 <br />Toluene <br />5000 <br />4700 <br />5020 <br />4860 <br />97 72-108 <br />6.6 <br />10 <br />Chlorobenzene <br />5000 <br />4810 <br />5150 <br />4980 <br />100 80-113 <br />6.8 <br />11 <br />Calculations are performed before rounding to avoid round -off errors in calculated results. <br />17� <br />E <br />