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QAP,�-tuanterra <br /> Environmental <br /> DUPLICATE CONTROL SAMPLE REPORT Services <br /> 6 Volatile Organics by GC <br /> Concentration Accuracy Precision <br /> Analyte Spiked Measured Average(%) (RPD) <br /> DCS1 DCS2 AVG DCS Limits DCS Limit <br /> Category, TPH-BTEX-A <br /> Matrix: AQUEOUS <br /> QC Lot: 25 APR 95-14A <br /> Concentration Units: ug/L <br /> Benzene 5.00 4.23 4.16 4. 19 84 79-121 1 .8 10 0 <br /> Toluene 5.00 4.32 4.43 4.37 87 76-120 2.6 10.0 <br /> Gasoline 1000 1080 1060 1070 107 80-117 1 .5 10.0 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results <br /> C <br />