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Enseco I <br /> f A Coming Company , <br /> f DUPLICATE CONTROL SAMPLE REPORT i <br /> Volatile Organics by GC/MS <br /> Concentration Accuracy Precision <br /> Analyte Spiked Measured Average(%) RPD) <br /> DCSI DCS2 AVG DCS Limits D S Limit <br /> Category: 624-A <br /> Matrix: AQUEOUS <br /> QC Lot: 24 SEP 91-OlA <br /> Concentration Units: ug/L <br /> 3 <br /> 1,1-Dichloroethene 50 53.8 57.5 55.6 111 52-150 6.6 15 <br /> Trichloroethene 50 51.2 52.0 51.6 103 76-129 1.6 13 <br /> Benzene 50 57.7 57.7 57.7 115 80-130 0.0 12 <br /> Toluene 50 58.4 57.2 57.8 I1:6 77-127 2.1 10 <br /> Chlorobenzene 50 61.1 57.4 59.2 119 84-128 6.2 11 <br /> ` Calculations are performed before rounding to avoid round-off errors Wt alculated results. k <br /> i <br /> I <br /> I <br /> 1 <br /> , y <br /> i <br /> i <br /> t � <br /> k <br /> Fri I <br /> i <br /> i <br /> F <br />