Both hazardous and non-hazardous wastes are generated by the Prelude facility and other supporting vessels. Shell uses a variety of systems and procedures to manage the various wastes generated on Prelude.
Shell has defined the following types of wastes have been identified in Shell’s revised Environment Plan.
Non-hazardous wastes include domestic and industrial wastes such as:
- paper and cardboard
- scrap steel
Examples of hazardous wastes include:
- oil contaminated materials (filters, rags)
- empty chemical containers
- empty aerosol containers
- light tubes
Other wastes include by-products of production on the Prelude facility, like sludges and sands. In some cases, these wastes may contain mercury or low level naturally occurring radioactive materials.
Segregating wastes on all vessels operating in the Prelude operational area is the vital first step in the waste management process. Initial sorting depends on the properties and ultimate disposal destination of each waste.
Waste products are stored in appropriately labelled containers within a dedicated area prior to transportation onshore for reuse, recycling, treatment or disposal. This is managed by Rusca Environmental Solutions, a 100% Indigenous-owned business based in the Northern Territory.
As there are no planned releases for waste into the operational area, the risk to the environment from wastes has been assessed as low. The planned management of all wastes is unlikely to result in any planned impacts.
At any time, improper management or handling of wastes during storage, transportation or transfer may result in accidental releases and create unplanned impacts.
In the event of an accidental release, the waste storage container volumes, and the nature of the surrounding environment mean any impacts are likely to be of short duration and highly localised.
Given the typically small volumes of wastes that could be released during such an accident, potential impacts to marine life are expected to be limited to individual animals.
Accidental losses of hazardous or non-hazardous wastes may result in pollution, debris or other contaminants entering the marine environment within the zone of potential influence.
Any accidental release of hazardous waste may have toxic effects on the environment and may also impact on the quality of water and sediments.
Marine debris could have negative impacts on the physical environment and native marine animals. Long-lasting or non-degradable wastes, such as plastic, are of particular concern as they pose a potential threat to animals and may remain in the environment long after the accidental release.
Key controls and mitigations
- We have established appropriate waste storage areas for all waste types.
- All staff and contractors follow the Prelude FLNG waste management procedure. Waste management is featured in all inductions for Prelude staff and support vessel personnel.
- All support vessels in the operational area have a garbage management plan (or equivalent) as required by MARPOL.
- Prelude’s waste manifest and disposal records are continually maintained.
- We undertake management of naturally occurring radioactive materials and mercury wastes, in accordance with all relevant regulations.
Learn more about Prelude
View Shell’s risk assessment of unplanned releases and our preparations for an emergency event.