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C <br /> � r <br /> Q,'Atanterra <br /> Cnvrronmenra! . <br /> Sr ru�c <br /> DUPLICATE CONTROL SAMPLE REPORT <br /> Air Toxics <br /> Project 116517 <br /> Category TO-3-BTEX Method TO-3 - BTEX <br /> Matrix AIR <br /> QC Lot 20 DEC 95-A5 Date Analyzed 20 DEC 95 <br /> Concentration Units- ppmv <br /> - _ Concentration Accuracy Precision <br /> Analyte Spiked) Measured Average (%) (RPD) <br /> DCS1 Qual DCS2 Qual AVG DCS Limits DCS Limit <br /> Benzene 0 400 0 352 0 351 0.352 88 80-120 0 28 20 <br /> Toluene 0 400 0 357 0 355 0.356 89 80-120 0 56 20 <br /> I <br /> Category TO-3-TVPH Method TO-3 - TVPH <br /> Matrix AIR <br /> QC Lot 20 DEC 95-A5 Date Analyzed 20 DEC 95 <br /> Concentration Units ppmv <br /> Concentration Accuracy Precision <br /> Analyte Spiked Measured Average (t) (RPD) <br /> DCS1 Qual DCS2 Qual AVG DCS Limits DCS Limit <br /> TVPH as Gasoline 9 19 7 53 7 65 7 59 83y 80-120 1 7 20� <br /> I <br /> Calculations are performed before rounding to avoid round-off errors in calculated results <br />