A new study suggests radon is leaving the West Lake Landfill and leaving small traces of its radioactive lead byproduct nearby.

The authors of the study, published in the peer-reviewed “Journal of Environmental Radioactivity,” found levels of the radioactive isotope lead-210, a daughter of radon, that they say can’t be attributed to natural radioactive decay.

“Levels of (lead-210) in key samples were well above background activities, and were significantly out of secular equilibrium with other members of the uranium decay chain,” the authors wrote. “This is strong evidence that the (lead-210) originated by decay of short-lived, fugitive radon gas that escaped the landfill.”

The Environmental Protection Agency, which oversees the Bridgeton landfill contaminated with nuclear processing waste, has said radon gas is emitted from the landfill at higher levels because of the waste there. The new study suggests at least trace amounts of it are showing up beyond the fence that keeps the public out of the long-contaminated landfill.

“That’s where the problem lies,” said Marco Kaltofen, an engineer and scientist with the firm Boston Chemical Corp. who co-authored the report. “Anytime one of these isotopes is more mobile, it’s going to be more likely to expose people.”

Kaltofen […]

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