At around 10.45 p.m., two walkers noticed that a fire had broken out at a non-hazardous waste storage facility and called the fire department. A large plume of smoke was released. The thermal camera did not detect anything, and the operator was not informed of the incident. After forcibly entering the facility, the emergency services fought the fire using 3 hoses and prevented the fire from spreading to 1 hectare of waste materials. The fire was brought under control at around 12.30 a.m., after 500m² of waste had been burned. On the next morning, the affected area was turned over with shovels. At 5.40 a.m. two days later, a new outbreak of fire was detected by the thermal camera. Fire-fighters extinguished the fire at around 7 a.m. The area affected by the fire was once again turned over with shovels. Additional monitoring rounds and full-time security staff were put in place. The affected area was covered with a 30 cm layer of earth 5 days after the first fire broke out. No impacts were observed on the biogas recovery systems or the sealing system. None of the alert thresholds were exceeded on the device used by fire-fighters to take air quality measurements.

The fire had broken out in the waste compartment that was in use at the time. The waste should have been stored in another compartment but it had not yet been brought into service due to delays caused by the COVID-19 health crisis (work temporarily suspended). The affected storage area was on a steep bank which was difficult to compact. In addition, the high temperatures recorded on the previous days (10°C above the seasonal norms) suggest that the incident could have been caused by spontaneous combustion.

Following the event, the operator modified the CCTV system and adapted its operating area.