4.39. The description of the disposal system should provide information on the data supporting the safety assessments, including the following: @@- An outline of how the management system will ensure the quality of all safety related data that have been used;@@- The sources of all data used (e.g. by reference to measurements and reports);@@- The rationale behind the site characterization programme (e.g. sample selection, sample location)-data acquisition programmes should reflect the conclusions from any previous safety assessment on the need for information for the subsequent iteration of the assessment;@@- A description of the techniques that have been used to characterize the site and collect monitoring data, and the uncertainties associated with these techniques and data;@@- A description of how the radionuclide inventory has been estimated, and the uncertainties associated with the inventory;@@- Any information used to support an understanding of possible future human behaviour in the region of the disposal facility (e.g. current human practices in the area, records of mineral exploration).