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[Methods to monitor TCDD presence in atmospheric particulate in the Seveso area (author's transl)].

Analytical monitoring of atmospheric dust in the seveso area (Milan, Italy) was carried out in order to evaluate the magnitude of TCDD transmigration via air streams. Two sampling techniques were utilized: i) dust-jars and ii) high-volume air samplers. Experimental evidences have shown that dust-jars and high-volume samplers are suitable to monitoring of dust-borne TCDD: however, while the former are quite reliable and easy to use, the latter can only be employed provided the carrier dust complies with some specific requirements. Dust contamination above sensitivity threshold was occasionally detected when specimens were collected near to mainly contaminated area ("A" area): however, only the atmospheric dust gathered in zone A1 was consistently found to contain TCDD.