The UK Storage Appraisal Project (UKSAP) was commissioned by the ETI in September 2009.The aim of this £4M project is to provide a fully auditable and defensible overall estimate of UK CO2 storage capacity in offshore geological formations, to inform future roll out of CCS in the UK.The project, led by Senergy Alternative Energy and involving the key centres of expertise in the UK in CO2 storage appraisal, is currently nearing completion.The major deliverable from the project is a web-enabled database and GIS (WDG) containing the geological data, storage estimates, risk assessments and economics of the nearly 600 potential storage units identified by the project, covering both depleted oil and gas reservoirs and saline aquifers.Through this RfP, the ETI is seeking proposals for a package of work to analyse the data and further develop the economic models used in UKSAP.