During fuel delivery at a shopping mall’s petrol station, the driver moved his lorry during the transfer, causing a hose to break. Diesel spilled over the transfer zone and directly into the ditch running alongside this zone, at the periphery of the service station. The oil separator collecting the drips and rainwater runoff from this zone was saturated. According to the site’s gauge system, product loss was evaluated at 4,160 litres. The Classified Facilities Inspectorate, informed of this situation on the morning of 12th December, visited the site and observed blackish traces on the ground at the ditch bottom over roughly 15 meters, without any apparent evidence of the product. The station manager and accountant, both of whom were present on the day of the spill, declared that the diesel quickly infiltrated into the ground. The oil separator was drained on the afternoon of 12th December. No known drinking water extraction or well was potentially threatened. On 14th December, 6 tonnes of earth were removed using an excavator at the ditch bottom (30 cm deep over a 15-m length). A clayey substratum underneath these excavations, coupled with the absence of any perceptible liquid phase or trace of penetration, enabled rejecting the hypothesis of soil or groundwater pollution.