6.6. Discussion of toxicological investigations

Extracts from building ventilation filters from four locations, 0.4 to 6.8 km downwind of the fire, were investigated in three different mutagenicity tests, i.e. Ames test, V79 chromosome aberration test, and Drosophila wing spot test. Each test covered different genetic end points and represented a different biological system. In addition, extracts from the particle part of respiratory filters worn by the members of the clearing squad a few days after the fire were investigated.