Lightning hit a voltage regulation station housing 19 condensers, each of which was containing 5 litres of PCB. Neighbouring residents heard an explosion, perceived smoke and alerted the local fire department. A strong odour could be noticed at the site, 5 condensers were deformed and 2 other ripped apart. Pieces of porcelain and mica were projected outside of the station enclosure, 10 litres of PCB spilled onto the slab flooring of the station, which had been covered in order to limit any dispersion of the pollution. The condensers were emptied and soil analyses undertaken. All structural components (whether earthen or concrete) with a PCB content in excess of 50 ppm were excavated, placed into barrels and removed from the site. The removal of elements containing between 10 and 50 ppm of PCB was then performed as part of a follow-up step.