1. BRGM (French Geological Survey), 3 avenue Claude Guillemin, 45060 Orléans Cedex 2, France
2. ADEME (French Environment and Energy Management Agency), 20 avenue du Grésillé, 49000 Angers Cedex 1, France
3. LGC (Chemical Engineering Laboratory), 118 route de Narbonne, 31062 Toulouse Cedex 9, France