The results of analyses of 10 whole blood samples from workers engaged
in operating a Municipal Waste Incinerator (MWI) are reported. The va
lues are compared to the so called ''background'' values from 102 subj
ects in Germany. Concerning the MWI-workers it is striking that in cer
tain cases the higher chlorinated dioxins and furans - especially the
hexa-, hepta- and octa-CDD/CDF - show elevated concentrations.