If the department determines that the object, building, structure, or premises does not warrant decontamination because of its low value, it shall so notify in writing the person who had control of the object, building, structure, or premises. The person so notified may decontaminate the object, building, structure, or premises, but if he or she fails to do so within 15 days after the notice, the department may cause the object, building, structure, or premises to be disposed of as radioactive waste.