Longwall Effects  









 

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Longwall mining damage image of James Kinney Farmstead main house, showing radon reading with the sensor located in the collector tube. This reading represents the collective level of radon getting ventilated from under all of the basement rooms. On 12/11/2006 this reading peaked at 61.4 pCi/L as the sensor was being removed from the tube.

 

 
   
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