Murrang Earth Sciences led the chemical risk assessment for decommissioning of offshore oil platforms, focusing on the transport and onshore placement of large, complex infrastructure sections. We were engaged to understand and characterise contamination risks associated with bringing topsides and jackets ashore and positioning them at land-based facilities.
 

Because this decommissioning pathway creates a novel waste stream with limited existing guidance, we developed a tailored assessment framework. This included source–pathway–receptor modelling, detailed chemical inventory review, and scenario-based screening of risks across offshore preparation, marine transport and onshore placement.
 

The work provided a clear, defensible basis for managing chemical risks and refining controls, helping the project team and regulators understand where the main uncertainties lay and how they were being managed. It also established a structured approach that can be reapplied and adapted for future decommissioning projects and other complex industrial waste streams.

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