An atmospheric pressure relief device discharge point or downstream destructive device (e.g. flare, scrubber) discharge point that results in a potential hazard, such as the formation of flammable, toxic or corrosive mixtures at grade level or on elevated work structures, or ignition of relief stress at the point of emission.
Source: OGP Report No. 456, Process Safety – Recommended Practice on Key Performance Indicators, International Association of Oil & Gas Producers, November 2011. Global Standards