Air samples taken during and after the Hanford nuclear reservation fire last month showed plutonium concentrations in public areas outside the reservation 1,000 times higher than normal levels, but below all Washington state and federal safety standards.
Five of 41 routine monitoring samples contained above normal concentrations, however, experts from EPA and the state said there was no reason for alarm.
The five increased readings were measured in the Pasco, Richland and West Richland communities, which are within 10 miles of the reservation.
"They are on the order of a thousand-fold lower than what would drive public protective action," said Jerry Leitch, EPA''s regional radiation program manager. "I don''t think anybody needs to change anything they do, day to day, based on these results."
People on average absorb about 350 millirem of radiation a year from a variety of sources, said EPA.
Hundreds of air, soil and vegetation samples were taken during and after last month''s 191,000 -acre wildfire burned nearly half the reservation, the most contaminated nuclear site in the country.
In the coming weeks, federal and state officials will release results from radiation tests on vegetation and a handful of firefighters most likely to have been exposed to radioactive elements.
Plutonium, the material processed at Hanford for use in the bomb dropped on Nagasaki during World War II, exists in the atmosphere already, as fallout from Cold War experiments.
EPA said the plutonium concentrations recently discovered are no higher than those detected nationwide after nuclear testing during the 1960s and 1970s. And those were not considered above safety standards.
by Virginia Sutcliffe
About the Author
EHS Today Staff
EHS Today's editorial staff includes:
Dave Blanchard, Editor-in-Chief: During his career Dave has led the editorial management of many of Endeavor Business Media's best-known brands, including IndustryWeek, EHS Today, Material Handling & Logistics, Logistics Today, Supply Chain Technology News, and Business Finance. In addition, he serves as senior content director of the annual Safety Leadership Conference. With over 30 years of B2B media experience, Dave literally wrote the book on supply chain management, Supply Chain Management Best Practices (John Wiley & Sons, 2021), which has been translated into several languages and is currently in its third edition. He is a frequent speaker and moderator at major trade shows and conferences, and has won numerous awards for writing and editing. He is a voting member of the jury of the Logistics Hall of Fame, and is a graduate of Northern Illinois University.
Adrienne Selko, Senior Editor: In addition to her roles with EHS Today and the Safety Leadership Conference, Adrienne is also a senior editor at IndustryWeek and has written about many topics, with her current focus on workforce development strategies. She is also a senior editor at Material Handling & Logistics. Previously she was in corporate communications at a medical manufacturing company as well as a large regional bank. She is the author of Do I Have to Wear Garlic Around My Neck?, which made the Cleveland Plain Dealer's best sellers list.
Nicole Stempak, Managing Editor: Nicole Stempak is managing editor of EHS Today and conference content manager of the Safety Leadership Conference.