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_M.M., 1151 <br /> _ _ _ .,meg ,,.�. _ <br /> 54 <br /> ji <br /> am, <br /> W*Aw G <br /> ga <br /> r:Enseco <br /> e A COMMI;Company <br /> DUPLICATE CONTROL SAMPLE REPORT <br /> Volatile Organics by GC/MS <br /> � . Concentration Accuracy Precision <br /> Analyte Spiked Measured Average(%) (RPD) <br /> DCS1 DCS2 AVG DCS Limits DCS Limit <br /> Category: 8240-SL <br /> Matrix: SOIL <br /> � ¢ QC Lot! 29 AUG 91-03A <br /> Concentration Units: ug/kg <br /> ' r► 1,1-Dichloroethene 50 49.5 47.5 48.5 97 54-144 4.1 18 <br /> I Trichloroethene 50 48.6 . 49.3 49.0 98 64-128 1.4 17 <br /> Benzene 50 48.5 48.5 48.5 97 69-132 0.0 21 <br /> Toluene 50 45.4 47.1 46.2 93 73-126 3.7 17 <br /> Chlorobenzene 50 47.5 46.3 46.9 94 79-127 2.6 12 <br /> Category: 624-A <br /> " Matrix: AQUEOUS <br /> QC Lot: 06 SEP 91-03B <br /> Concentration Units: ug/L <br /> 1,1-Dichloroethene 50 60.8 59.9 60.4 121 52-150 1.5 15 <br /> � . Trichloroethene 50 58.1 57.8 58.0 116 76-129 0.5 13 <br /> Benzene 50 60.3 59.1 59.7 119 80-130 2.0 12 <br /> Toluene 50 60.1 58.2 59.2 118 77=127 3.2 10 <br /> m )Chlorobenzene. 50 60.2 58.3 59.2 119 84-128 3.2 11 <br /> Category: 8240-S <br /> Matrix: SOIL <br /> QC Lot: 17 AUG 91-03A <br /> Concentration Units: ug/kg <br /> 1,1-Dichloroethene 5000 5040 4950 5000 100 60-128 1.8 18 <br /> Trichloroethene 5000 5180 5160 5170 103 68-113 0.4 20 <br /> 4.:. Benzene 5000 4900 4940 4920 98 68-119 0.8 21 <br /> Toluene 5000 4560 4630 4600 92 72-108 1.5 10 <br /> � = Chlorobenzene 5000 4580 4760 4670 93 80-113 3.9 11 <br /> Calculations are Performed before rounding to avoid round-off errors in calculated results. <br /> I.e <br /> 5f <br /> he <br />