6/11/11 2pm Rain & Drizzle @ 50X Background Radiation in Saint Louis Mo

Sample taken from my truck of light drizzle. The combined samples read at 50 times normal background radiation.

A sample was filtered for Alpha, Beta, and Gamma Radiation.
Unfiltered: 0.44 mR/hr (Alpha+Beta+Gamma)
Filtered with plastic: 0.05 mR/hr (Gamma + strong Beta)
Filtered with paper: 0.265 mR/hr (Beta+Gamma)
Estimated Alpha: 0.166 mR/hr (Alpha)