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. Author manuscript; available in PMC: 2010 Apr 22.
Published in final edited form as: Environ Toxicol Chem. 2008 Nov;27(11):2224–2232. doi: 10.1897/07-660.1

Fig. 1.

Fig. 1

Gas chromatography/high-resolution mass spectrometry (GC-HRMS) analysis of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzo-p-furans for the 16 soil samples. The results for the 17 target polychlorinated dibenzo-p-dioxin/furan congeners were converted to a single dioxin toxic equivalent value (TEQ) for each sample according to the toxic equivalency factors of the World Health Organization (WHO). The dotted line at 50 pg TEQ/g shows the upper limit of the screening level of the Agency for Toxic Substances and Disease Registry, and the line at 1,000 pg TEQ/g shows the lower limit of the Agency for Toxic Substances and Disease Registry action level [27].