This handbook for hazardous materials was produced by virtue of Nordic collaboration in accordance with the Haga Declaration. Local and national representatives from the fire & rescue service, emergency medical services (EMS), and the police in Sweden and Norway cooperated on producing the handbook. The handbook is intended for use by the first responders of the emergency services from the moment they receive an alarm up to the first 30 minutes on scene at an incident. The handbook is envisaged to function as a checklist and decision-support for personnel with existing knowledge of emergency response operations. As no two incidents are alike it is impossible to set an exact order of work, the incident itself determines the order of work.