Tuesday, July 12, 2011

7/12/11 First Rain Shower of the Day at 5 times Background Radiation

Took a paper towel sample from the hood of my truck after the first rain shower of the day at approximately 6:15 pm; the sample tested at 5 times background radiation: 0.055 mR/hr. The rain came and left quickly leaving behind large drops of water.

Previous testing has shown that the front part of the storms passing through the area typically have the lowest amount of radioactive fallout. It is the trailing edges of storms which have the greatest concentration of radioactive fallout. This distribution is indicative of fallout which is being pulled down from the upper atmosphere. Locally produced naturally occurring Radon washout would follow the opposite pattern.

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