| Popis: |
Since the late 1800s, the ACNA chemical plant at Cengio (Savona, northern Italy) has used a large portion of the 55 ha of land that it owns to dispose of its chemical wastes and refuse materials by dumping and burying them in the earth. As a result of this practice, an extent of ground of well over 106 m3 and up to 20 m thick has become highly contaminated. In addition, due to the local hydrogeological conditions, for years the site has been a contamination source for the nearby Bormida River and the territory downstream. Since satisfactory primary knowledge of the quality and quantity of the soil contamination of the site was not available, a pilot study was financed to provide the information required. In this paper, the analytical approach to and procedure for the multianalyte multilaboratory assessment in complex soil and sediment matrices are described. The analyte group includes nine families of chemicals which exhibit highly variable toxic potentials, water solubilities, and kow's (lg[kow] approximately between 2 and 12). A preliminary appraisal of the procedure is presented with specific reference to the detection of polychlorinated dibenzodioxins, dibenzofurans, and biphenyls of the first 43 subsoil and sediment samples from the site. Also, a comparison is made to the Seveso/ICMESA accident of July 1976. |
