Following up this article..“Don’t play in the park for longer than 1 hour a day”
This notice is put in front of the elementary schools in Koriyama Fukushima.
Decontamination is accomplished.
Before decontamination : 3.0 μSv/h (26.295 mSv/y)
After decontamination : 0.378 μSv/h (3.313 mSv/y)
50cm above from the ground on 4/10/2012.