On February 9, 2025, the volunteer fire brigade Oldenburg-Haarentor conducted an exercise at the Institute of Chemistry at the Carl von Ossietzky Universität Oldenburg to train their skills in dealing with leaked chemicals. The scenario for the training session was developed in collaboration with Prof. Dr. Jens Christoffers. According to the exercise scenario, an accident involving chemicals occurred in a laboratory at the Institute of Chemistry. A deflagration of unknown chemical substances led to a leak.
After an alarm was triggered, the hazardous materials unit of the Haarentor volunteer fire brigade moved out. On site, the group leader first explored the route to the scene of the accident and then led the emergency teams in chemical protection suits (CSA). Several containers of chemicals that had fallen down were found in the laboratory, some of which were damaged and had leaked. The leaked chemicals were identified, collected and transferred to various transport containers to avoid further reactions. Ultimately, the affected laboratory rooms were ventilated and checked for residual substances using measuring technology. 
The objectives of the exercise were achieved to the full satisfaction of all those involved. The emergency services practiced movement and communication in chemical protection suits. The leaked chemicals were identified without any problems and, following a risk assessment by the specialist advisor, were collected and transferred to containers for safe removal.