A preliminary investigation has found no current exposure concerns from uranium ore samples previously stored in buckets at the Grand Canyon’s Museum Collection building. Park officials say the findings indicate that the previous reported radiation levels that were taken in June of 2018 at the building were significantly overstated. Tests show levels were significantly lower than initially believed and are consistent with background and other areas of the park. Earlier this year, the “Arizona Republic” reported that a safety manager for the park says exposure came from uranium rocks in the building between 2000 and 2018. He says the containers could have exposed adults to 400 times the health limit. The final report will be available in around 90 days.