1. European Commission, Joint Research Centre, 1IES/10IHCP, 1Transport and Air Quality/10Chemical Assessment and Testing, Via Enrico Fermi, 2749 - Ispra (VA), 21020 - Italy, University of Helsinki, P.O. Box 64, Helsinki 00014, Finland, Malopolski Voivodship Inspectorate for Environ. Protection, pl. Szczepanski 5 - Krakow, 31-011- Poland, Central Mining Institute, Plac Gwarków 1, - 40-166 Katowice, Poland, Institute of Earth Sciences, ‘Jaume Almera’, CSIC,C/ Lluis Solé i Sabarís S/N 08028 Barcelona, Spain, U...