8.3. Caution should be applied in using available monitoring information. The credibility of monitoring data should be verified by means of sufficient redundancy (which should be part of the design of the monitoring system), independent verification of values, the use of well designed, robust equipment, and, to the extent possible, the use of natural analogues. Specifically, only well trained and experienced staff should be permitted to undertake monitoring and associated activities. It is recognized that monitoring will not be feasible beyond a certain time frame. In the distant future there will be significant changes in climatic patterns and associated shifts in human behaviour and practices. Projection of the behaviour of the disposal system into the distant future on the basis of current monitoring information will always be uncertain. Future changes could affect the potential for release of radionuclides from the disposal facility and the exposure pathways through which exposure of biota and representative persons may occur.