An underground tank holding some of the worst radioactive waste at the nation's most contaminated nuclear site might be leaking into the soil.
The U.S. Energy Department said workers at Washington state's Hanford Nuclear Reservation detected higher radioactivity levels under tank AY-102 during a routine inspection Thursday.
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State and federal officials have long said leaking tanks at Hanford do not pose an immediate threat to the environment or public health.
The largest waterway in the Pacific Northwest the Columbia River is still at least 5 miles away and the closest communities are several miles downstream.
However, if this dangerous waste escapes the tank into the soil, it raises concerns about it traveling to the groundwater and someday potentially reaching the river.
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