Major accidents are events that have the potential for catastrophic consequences in relation to human health and safety and serious environmental impact. They are associated with fires, explosions, serious damage to plant and uncontrolled release of toxic or other dangerous substances.

This topic discusses the duties on so-called operators of COMAH sites, such as preparation of a major accident prevention policy, demonstrating safe operation of the safety case, preparation of on-site emergency plans and provision of information to local residents and local authorities.

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