The worker reccieved 16 mrem of radiation..
Background radiation averages 300 mrem per year in the US
A chest xray you will receive 6 mrem
A CT of the abdomen 1000 mrem
You get the idea - it is a small dose to the worker and the contamination is contained.
if you smoke the exposure is 160 mrem per year - tobacco contains po-210
Coal plants release more radioactive material than nuclear plants and result in higher doses to the public
Coal Ash Is More Radioactive than Nuclear Waste: Scientific American