You can add this to the list of woes with Allentown's hockey arena site: radioactivity.
State environmental officials say debris containing radioactive material from the arena site was brought to the Bethlehem Landfill in Lower Saucon Township in January.
Officials say the material is radium-226, a naturally-occurring radioactive substance.
There's not a lot of it and officials say it's not dangerous.
Officials are still trying to figure out where it came from.