Light levels are low, with undetectable levels of ultraviolet radiation. Light are switched off when not in use. A high level of cleanliness is maintained. Precautions are taken to exclude animal and insect pests and active pest control procedures are taken as a necessary part of an integrated pest control system. Protection is at a high level, with restricted access.
All material is identified clearly.
A fully implemented disaster preparedness and response plan exists. The NLA building provides a high standard of protection from natural disasters. Boxing or shrink wrapping provides added protection against risk of damage from water. For material available in surrogate form, use of originals is restricted to last resort use under supervision. Higher temperature levels are acceptable, but RH levels must be set within this range.