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' Tracer, earch Corporation <br /> �I <br /> T ' <br /> I amount of the sample compound in the flame. The electrical current causes the computing <br /> integrator.to record a peak on a chromatogram. By measuring the.area of the peak and <br /> - <br /> comparing that area to the integrator res o. nse of a known aqueous standard the <br /> concentration of the analyte in the sample is determined. <br /> �I <br /> . 4.3 Analyses <br /> The detection limits.for target compounds depend on the sensitivity of-the detector <br /> to the individual compound as well as the volume of the injection. The detection`limits of <br /> the target compounds were calculated from the response factor, the sample size., and the <br /> calculated minimum peak size (area) observed under the conditions of the analyses. 'If any- <br /> compound <br /> nycompound was not detected in an analysis, the detection limit is given as a "less than" value, <br /> e.g., X0.1 micrograms per liter (ug/1). The detection limits for the target compounds are <br /> 2 presented in the table below. <br /> Table 1. Detection Limits for Soil Gas Compounds <br /> Compound Detection Limits (ug/1) <br /> benzene 0.08 <br /> toluene 0..1 <br /> F . <br /> ethylbenzene 0.5 <br /> xylenes 0.5 <br /> TVHC C4-C9 - 0.5 <br /> a <br /> TVHC C10-CX 0.5 <br /> May 21,1992 ?age 4 1-92-302 <br />