6.53. Only those human actions that result in direct disturbance of the disposal facility (i.e. the waste, the contaminated near field or the engineered barriers) are considered human intrusion in this Safety Guide. Human actions resulting in the disturbance of the host environment beyond the disposal facility and its immediate proximity are not categorized as human intrusion, since they do not result in direct intrusion into the disposal facility. Such actions should be considered within the scenarios used for the assessment of long term risks (see Section 5). Paragraphs 6.54-6.64 provide further guidance on the assumptions and approaches appropriate for addressing human intrusion in safety assessment. These are relevant for all disposal facilities located close to the surface where human intrusion becomes a safety concern.