This is the third stage of a multistage carbon dioxide (CO₂) storage program, located in southwestern Victoria, Australia. The project's goal is to validate cost and operationally effective subsurface monitoring technologies to accelerate the implementation of commercial carbon capture and storage (CCS) projects. Specific objectives include developing and validating the concept of risk-based CO₂ monitoring and validation (M&V); assessing the application of innovative M&V techniques through trials against a small-scale CO₂ storage operation at the Otway research facility; and expanding the existing Otway facility such that field trials of various storage research and development are possible, including low-invasive, cost-effective monitoring and migration management. An anticipated outcome is that this project will result in improved and less expensive M&V techniques that will be applicable to other onshore sites as well as sub-seabed CO₂ storage projects.