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A Coming Company <br /> • DUPLICATE CONTROL SAMPLE REPORT <br /> Volatile Organics by GC/MS <br /> Concentration Accuracy Precision <br /> Analyte Spiked Measured AverageO (RPD <br /> DCS1 DCS2 AVG DCS Limits DCS Limit <br /> Category: 8240-S <br /> Matrix: SOIL <br /> QC Lot: 28 JUN 91-01A <br /> Concentration Units: ug/kg <br /> 1,1-Dichloroethene 5000 3910 3810 3860 77 60-128 2.6 18 <br /> Trichloroethene 5000 4090 4120 4100 82 68-113 0.7 20 <br /> Benzene 5000 4280 4300 4290 86 68-119 0.5 21 <br /> Toluene 5000 4220 4320 4270 85 72-108 2.3 10 <br /> Chlorobenzene 5000 4150 4200 4180 84 80-113 1.2 11 <br /> Category: 8240-SL <br /> Matrix: SOIL <br /> QC Lot: 01 JUL 91-02A <br /> Concentration Units: ug/kg <br /> 1,1-Dichloroethene 50 40.7 44.5 42.6 85 54-144 8.9 18 <br /> Trichloroethene 50 53.0 52.4 52.7 105 64-128 1 .1 17 <br />• Benzene 50 53.7 53.5 53.6 107 69-132 0.4 21 <br /> Toluene 50 55 1 55.8 55.4 111 73-126 1.3 17 <br /> Chlorobenzene 50 55.2 56.7 56.0 112 79-127 2.7 12 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> i <br /> I <br /> I <br />