In case of an accident at a site containing potentially toxic chemicals, the response conditions aren’t easy for field crews. It is not possible to intervene with the knowledge of all the dangers present, and therefore to establish an appropriate response for both the personnel involved and the local population. For that, tools are needed to characterise the substances and also to measure the movements of the air masses in order to notify the local populations of the potential risks on both sides of the border. The SAFESIDE project therefore aims to make laboratory techniques available in the cross-border territory at field level via a tool that assists in the response of specialised personnel. At the end of the project, the aim is to have systems that are transportable and allow gas to be analysed at close range without contact. The final systems will be made available to the different teams involved in the project on each side of the border. An awareness-raising campaign will be carried out, particularly with industrial sites and response services.