ACUTEX is aimed at the development of innovative approaches to define a set of Acute Toxic levels to be used in both areas, land use planning as described in SEVESO II directive and also in emergency planning. A methodology, software tools and Technical Guidance Document (TGD) for establishing European Acute Exposure Threshold Levels (EU AETLs) in case of accidental chemical release will be defined. Compared to currently used methodologies, innovative elements are introduced. This methodology will be validated by cases studies. The methodology will support the harmonised implementation of SEVESO II Directive. Efforts are given to disseminate the methodology to decision-makers in charge of the control of major accident hazards. Thus, the project will be monitored by a critical review panel gathering, risk experts from industry, EU Competent Authorities in order to ensure the widest acceptance of the results.