1. Department of Environmental Engineering DIAM, University of Calabria, Via Pietro Bucci Cubo 44A, 87036 Rende, Italy
2. Institute for Electromagnetic Sensing of the Environment-National Research Council of Italy (IREA-CNR), Via Diocleziano 328, 80124 Napoli, Italy
3. Geostudi Astier srl, Via Edda Fagni 31, 57123 Livorno, Italy
4. Institute of Methodologies for Environmental Analyses-National Research Council of Italy (IMAA-CNR), Contrada Loya, 85050 Tito Scalo, Italy