This document is part of the Risk Assessment Data Directory (RADD) and presents frequencies of releases from the following types of storage: atmospheric storage tanks, refrigerated storage tanks, pressurized storage vessels, nonprocess storage, underground storage, and oil storage on floating production, storage and offloading units (FPSOS). The objective of the Risk Assessment Data Directory is to provide data and information that can be used to improve the quality and consistency of risk assessments with readily available benchmark data. The directory includes references for common incidents analysed in upstream production operations.