Hazard Zone is any risk location that is a fire, explosion, toxic release, etc. The Hazard Zone is the airborne concentration equals or exceeds some level of concern. (e.g., Zone 0, Zone 1, Zone 2 for gas, vapour and mist atmospheres, or Zone 21 or Zone 22 for dust atmospheres)
Related Definitions in the Project: The HSE Management; Process Safety Engineering
