Mr. Oyama, Minamisoma city councilor measured 60 counts of alpha ray within 300 seconds at his home, on 4/5/2012.
It was on the lid of a septic tank. The alpha survey meter is about 7~8mm away from the cover itself.
Mr. Oyama, Minamisoma city councilor measured 60 counts of alpha ray within 300 seconds at his home, on 4/5/2012.
It was on the lid of a septic tank. The alpha survey meter is about 7~8mm away from the cover itself.