Events which are identified as hazardous will form the basis for subsequent analysis and the selection of oil spill scenarios. Hazards should be identified whether or not they are considered under control by the organization. Sources of hazardous events, and sets of circumstances which may trigger the events, should be identified whether they are temporary or permanent. Appropriate hazard identification tools and methods should be applied.

References
-https://www.ipieca.org/resources/oil-spill-risk-assessment-and-response-planning-for-offshore-installations.
-Wikipedia
-1992. Guidelines for Hazard Evaluation Procedure. 2nd edition. Center for Chemical Process Safety. American Institute of Chemical Engineers, New York.
-1999. A Guide to Quantitative Risk Assessment for Offshore Installations. Centre for Maritime and Petroleum Technology, London.
2000.Petroleum and natural gas industries—Offshore production installations—Guidelines on tools and techniques for hazard identification and risk assessment.