1.11. This Safety Guide applies to solid waste that, owing to its radioactive content, is unsuitable for disposal in landfill facilities or in near surface facilities. However, it may be decided to dispose of waste that is suitable for near surface facilities in a geological disposal facility (e.g. co-disposal of low level waste with intermediate level waste). When such a course of action is adopted, although the safety requirements in Ref. [1] apply, some aspects of this Safety Guide may not be applicable. In accordance with the graded approach set out in the BSS [4], the ability of the chosen disposal system to provide containment of the waste and isolation of the waste from people and the environment is required to be commensurate with the hazard potential of the waste.