Grand Canyon tourists exposed for years to radiation in museum building, safety manager says

For nearly two decades at the Grand Canyon, tourists, employees, and children on tours passed by three paint buckets stored in the National Park's museum collection building, unaware that they were being exposed to radiation. Although federal officials learned last year that the 5-gallon containers were brimming with uranium ore, then removed the radioactive specimens, the park's safety director alleges nothing was done to warn park workers or the public that they might have been exposed to unsafe levels of radiation.

In a rogue email sent to all Park Service employees on Feb. 4, Elston "Swede" Stephenson — the safety, health and wellness manager — described the alleged cover-up as "a top management failure" and warned of possible health consequences. "If you were in the Museum Collections Building (2C) between the year 2000 and June 18, 2018, you were 'exposed' to uranium by OSHA's definition," Stephenson wrote. "The radiation readings, at first blush, exceeds (sic) the Nuclear Regulatory Commission's safe limits. … Identifying who was exposed, and your exposure level, gets tricky and is our next important task."

In a Feb. 11 email to Acting Interior Secretary David Bernhardt and Deputy Inspector General Mary Kendall, Stephenson said he had repeatedly asked National Park executives to inform the public, only to get stonewalled. "Respectfully, it was not only immoral not to let Our People know," he added, "but I could not longer risk my (health and safety) certification by letting this go any longer."

According to Stephenson, the uranium specimens had been in a basement at park headquarters for decades and were moved to the museum building when it opened, around 2000. One of the buckets was so full that its lid would not close. Stephenson said the containers were stored next to a taxidermy exhibit, where children on tours sometimes stopped for presentations, sitting next to uranium for 30 minutes or more. By his calculation, those children could have received radiation dosages in excess of federal safety standards within three seconds, and adults could have suffered dangerous exposure in less than a half-minute.

The Nuclear Regulatory Commission measures radiation contamination in millisieverts per hour or per year. According to Stephenson, close exposures to the uranium buckets could have exposed adults to 400 times the health limit — and children to 4,000 times what is considered safe. Emily Davis, a public affairs specialist at the Grand Canyon, said the Park Service is coordinating an investigation with the Occupational Safety and Health Administration and the Arizona Department of Health Services.

Davis stressed that a recent review of the building in question uncovered only background radiation, which is natural in the area and is safe. "There is no current risk to the park employees or public," Davis said. "The building is open. … The information I have is that the rocks were removed, and there's no danger." Davis declined to address Stephenson's assertion that thousands of people may have been exposed to dangerous levels of radiation, or his allegation that the Park Service violated the law by not issuing a public warning. "We do take our public and employee safety and allegations seriously," she said.

https://www.azcentral.com/story/news/local/arizona/2019/02/18/grand-canyon-tourists-exposed-radiation-safety-manager-says/2876435002/