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2. Radium and radon in the environment - Wikipedia

   en.wikipedia.org/wiki/Radium_and_radon_in_the...

   The highest levels of radon in rainwater occur during thunderstorms, and it is hypothesized that radon is concentrated in thunderstorms because it forms some positive ions during thunderstorms. [12] Estimates of the age of raindrops have been obtained from measuring the isotopic abundance of radon's short-lived decay progeny in rainwater. [13]

3. Radon - Wikipedia

   en.wikipedia.org/wiki/Radon

   A review of radon level measurements across non-uranium mines found the highest concentrations of radon in non-metal mines, such as phosphorus and salt mines. [139] However, older or abandoned uranium mines without ventilation may still have extremely high radon levels. [140]

4. Officials highlight the dangers of radon - AOL

   www.aol.com/news/officials-highlight-dangers...

   Should you find higher readings, you should contact IEMA-OHS for information about a licensed mitigation professional who are trained to reduce radon levels. A new Illinois law, which took effect ...

5. History of radiation protection - Wikipedia

   en.wikipedia.org/wiki/History_of_radiation...

   Radon experiments at the Radium Institute in Paris, 1924. Radon is a naturally occurring radioactive noble gas discovered in 1900 by Friedrich Ernst Dorn (1848-1916) and is considered carcinogenic. Radon is increasingly found in areas with high levels of uranium and thorium in the soil. These are mainly areas with high granitic rock deposits.

6. Radon levels in Old Courthouse trigger a plan, but details ...

   www.aol.com/radon-levels-old-courthouse-trigger...

   There's a plan to respond to radon levels in the Old Courthouse subbasement, ... What's the highest level found, the Courier & Press asked. "8.2 and 8.8," Goelzhauser replied. "They did a ...

7. Radon mitigation - Wikipedia

   en.wikipedia.org/wiki/Radon_mitigation

   High radon levels in a Minnesota (USA) basement with a passive under slab vent pipe system can be seen in the left half of the graph. After installation of a radon fan (ASD), a permanent reduction in radon levels to approximately 0.6 pCi/L can be seen in the right half of the graph. The most common approach is active soil depressurization (ASD).