For nearly 2 decades, Grand Canyon tourists were exposed to radiation beyond the federal limit, safety manager says

20 FEB 19 09:49 ET

(CNN) — Uranium ore stored at the Grand Canyon National Park museum may have exposed visitors and workers to elevated levels of radiation, according to the park’s safety, health and wellness manager.

Elston Stephenson told CNN that he began asking officials from the National Park Service and Department of the Interior last summer to warn workers and tourists they had possibly been exposed to unsafe levels of radiation. After his requests were ignored, he said he sent an email to all park staff at the Grand Canyon on February 4.

“If you were in the Museum Collections Building (bldg 2C) between the year 2000 and June 18, 2018, you were ‘exposed’ to uranium by OSHA’s definition,” said the email, which Stephenson provided to CNN.

“Please understand, this doesn’t mean that you’re somehow contaminated, or that you are going to have health issues. It merely means essentially that there was uranium on the site and you were in its presence. … And by law we are supposed to tell you.”

The National Park Service is investigating what happened and working with the Occupational Safety and Health Administration and the Arizona Department of Health Services, according to the Department of the Interior, which oversees the park service.

“Uranium naturally occurs in the rocks of Grand Canyon National Park. A recent survey of the Grand Canyon National Park’s museum collection facility found radiation levels at ‘background’ levels — the amount always present in the environment — and below levels of concern for public health and safety. There is no current risk to the public or Park employees,” the department said in a statement provided to CNN.

The National Park Service also said there is “no current risk” to the public or park employees.

“The museum collection facility is open and employee work routines have continued as normal,” Emily Davis, spokeswoman for the Grand Canyon National Park, said in a statement. “The NPS takes public and employee safety and the response to allegations seriously. We will share additional information about this matter as the investigation continues.”

Stephenson told CNN that in early June he found out about three 5-gallon buckets of uranium ore that had been stored next to a taxidermy exhibit at the park’s museum for nearly two decades. He said he immediately contacted a park service radiation specialist to report the danger.

According to a report from a park service radiation safety officer who responded to Stephenson’s request on June 14, 2018, testing results were positive for radioactivity above background levels near the buckets, but elsewhere the radiation levels were not elevated.

Still, according to the report, the park service decided to remove the buckets on June 18 and dispose of the contents in the nearby Lost Orphan uranium mine, where the ore had come from.

Stephenson told CNN that park service workers were inadequately prepared to handle the radioactive material, moving the buckets wearing gardening gloves purchased at a general store, and using mop handles to lift the buckets into pickups for transport.

Stephenson said that after trying and failing for months to get National Park Service officials to inform employees and the public about the possible uranium exposure, he filed a complaint with OSHA in November.

The next day, Stephenson said, OSHA sent inspectors in protective suits to check the museum and found that park service workers brought the buckets back to the park facility after dumping the uranium ore.

“OSHA has an open investigation on the issue that was initiated on November 28,” OSHA spokesman Leo Kay said in statement to CNN, declining to comment further on an active investigation.

Staff for US Rep. Tom O’Halleran, D-Arizona, met with Stephenson in December, according to Cody Uhing, the congressman’s communications director.

“We flagged this to the Natural Resources Committee, which is responsible for oversight for that area. They and we have requested the Department of the Interior’s Office of the Inspector General to look into it and provide us with a report,” Uhing said.

The Department of the Interior’s Office of the Inspector General confirmed Tuesday that it had received a letter from O’Halleran and that it would review it.

Anna Erickson, associate professor of nuclear and radiological engineering at Georgia Tech, said the uranium exposure at the museum is unlikely to have been hazardous to visitors.

“Uranium ore contains natural (unenriched) uranium which emits relatively low amounts of radiation,” Erickson said. “Given the extremely low reading (zero above background) 5 feet away from the bucket, I’m skeptical there could be any health hazards associated with visiting the exhibit.”

Stephenson told CNN that tours of schoolchildren often walked by the buckets at the museum, but his larger concern was for park employees and high school interns working near the uranium every day.

“A safe workplace really is a human right,” he said.

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