Geological Model for Naturally Occurring Asbestos Content Prediction in the Rock Excavation of a Long Tunnel (Gronda di Genova Project, NW Italy) LUCA BARALE FABRIZIO PIANA* SERGIO TALLONE Institute of Geosciences and Earth Resources, National Research Council of Italy, Via Valperga Caluso 35, 10125 Torino, Italy, and “G. Scansetti” Interdepartmental Centre for Studies on Asbestos and Other Toxic Particulates, University of Torino, Via Pietro Giuria 7, 10125 Torino, Italy
ROBERTO COMPAGNONI Department of Earth Sciences, University of Torino, and “G. Scansetti” Interdepartmental Centre for Studies on Asbestos and Other Toxic Particulates, University of Torino, Via Valperga Caluso 35, 10125 Torino, Italy
CHIARA AVATANEO SERENA BOTTA IGOR MARCELLI Gi-RES srl, Via Gottardo 223, 10154 Torino, Italy
ANDREA IRACE Institute of Geosciences and Earth Resources, National Research Council of Italy, University of Torino, Via Valperga Caluso 35, 10125 Torino, Italy
PIETRO MOSCA Institute of Geosciences and Earth Resources, National Research Council of Italy, Via Valperga Caluso 35, 10125 Torino, Italy
ROBERTO COSSIO Department of Earth Sciences, University of Torino, Via Valperga Caluso 35, 10125 Torino, Italy
FRANCESCO TURCI Department of Chemistry, University of Torino, and “G. Scansetti” Interdepartmental Centre for Studies on Asbestos and Other Toxic Particulates, University of Torino, Via Pietro Giuria 7, 10125 Torino, Italy
Key Terms: NOA, Asbestos, Rock Tunneling, Geological Model, Meta-Ophiolites ABSTRACT For a reliable evaluation of the geo-environmental risk due to naturally occurring asbestos (NOA) during rock excavation of large infrastructure projects, a proper procedure is needed. First, it is necessary to *Corresponding author email: fabrizio.piana@cnr.it
provide a detailed geological model tailored to the NOArelated issues that should drive the rock sampling procedures in order to obtain a representative sampling. The sampling procedures should take into account lithological variability and relative spatial distributions of the rock units. The geological model for NOA should be thus constrained by the main NOA petrofacies occurring in a given geotectonic context, which take into consideration both the mineralogical and structural features, and the identification of NOA homogeneous zones in which the NOA petrofacies are distributed. In this paper, some geo-environmental problems faced during the
Environmental & Engineering Geoscience, Vol. XXVI, No. 1, February 2020, pp. 107–112
107