In a fuel storage depot, at around 3.30 pm during a delivery via a diesel fuel pipeline, 10 t of product spilled from a tank being filled (capacity: 2,100 m³; internal floating diaphragm type tank) in a catchpit. Depot personnel initiated the site’s emergency shutdown and the internal contingency plan was put into action. The operator transferred the product to the site’s hydrocarbon separator and initiated pumping operations (that evening at 8 pm, 3 t of product had been recovered). The tank was equipped with neither a high level or very high level detector. The incident was partly due to an error during the delivery via pipe: the quantity to be delivered should have been distributed consecutively in two tanks (2X400 m³) but was oriented into a single tank not having sufficient available volume. The operation was performed externally to the site by the transporter. Also, at depot level, the absence of high level and very high level detectors on the tanks with coupling of the supply valves did not allow the spill to be avoided. The Classified Installations Inspectorate recorded the facts and Prefectoral orders required that the site be backfitted to standards.