On a site used to store miscellaneous products, a subcontractor was performing welding work on a walkway located above a 32,500-litre tank containing used oil. Sparks fell into and around the tank vent and ignited its contents. The tank exploded and was thrust 10 m; a fire ensued. The welder, thrown 37 m by the blast, died and 3 other employees were injured.

An investigation was initiated by the fire department. It turns out that the subcontracted workers had never been awarded a hot work permit to perform welding in this zone. The subcontracting firm declared having the impression that this type of work was authorised and moreover that the operator had already checked for gas before they arrived onsite.