EUSES is a decision-support instrument, which enables the user to carry out rapid and efficient assessments of the general risks posed by substances to man and the environment. EUSES is intended mainly for initial and refined risk assessments rather than comprehensive assessments. The system is fully described in the extensive EUSES documentation and is based on the EU Technical Guidance Documents (TGD) on Risk Assessment for New Notified Version 1.0 Page 70 Substances, Existing Substances and Biocides. The new EUSES 2.1 version (2008) is an update of EUSES 2.0, containing all Emission Scenario Documents for biocides. The development of EUSES 2.1 was commissioned by the European Commission to the National Institute of Public Health and the Environment (RIVM) of The Netherlands. The work was supervised by an EU working group comprised of representatives of the JRC-European Chemicals Bureau, EU Member States and the European chemical industry.