August, 2015

This is a repeating event

201525AugAll DayStanwell Toxic Release 2015Stanwell, Queensland (AU-QLD)Lessons:Asset integrity,Compliance with Standards,Emergency Preparedness,Operational Integrity,Process Knowledge,Risk Assessment,Stakeholder EngagementIndustry:RoadCountry:AustraliaLanguage:ENLoC:Deterioration Origin: MKOPSC Incident:Gas/vapour/mist/etc release to airHazards:Corrosive,Environmental,ToxicContributory Factors:Organized Procedures,Process AnalysisImpact:HUMAN (Offsite At Risk)Effects:EnvironmentalMaterial:Ammonia


Truck carrying anhydrous ammonia began leaking chemicals on the highway. The highway was closed and a 1 km exclusion zone was put in place when the truck began leaking

Proximate causes:
• Inadequate assessment of potential failure (reports suggest a pressure relief valve on the truck had failed)
• Inadequate work planning

Source: A web-based collection and analysis of process safety incidents (
Image Credit: Lisa Benoit


MKOPSCMary Kay O'Connor Process Safety Center