The National Park Service and the Department of Interior has completed a safety review that found no radiation exposure health risk to employees or visitors from uranium ore samples at the Grand Canyon National Park. A review began after samples in the Museum Collection building at the South Rim were discovered. The building was checked and samples were taken from in and around buckets that contained uranium. All were determined to be free of residual contamination. The final report backs up preliminary findings back in March. 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 report says otherwise.