It is still unknown when the building will be cleared and all staff members will be allowed to return. UW Medicine says the Department of Energy is responsible for the assessment and cleanup since it was that agency which that was decommissioning the irradiator involved in the leak. “Although the amount of radiation is very low and not a risk to public health, the building needs to be thoroughly assessed and cleaned before people can return to work,” the UW Medicine spokesperson says, “The contractors are assessing every square inch of the building including outside areas, floors, ceilings, and the heating and cooling system.”