[Ignorance is sin]

8 schools in Sendai had their students clean up the pool. Dust/mud left on the bottom of the pool turned out to be radioactive. (Max;1.46μ㏜/h)
Students touched it with bear foot and breathed it.They threw away the contaminated water into the normal sewage system.It will obviously spread the pollution.

http://hanaki.air-nifty.com/burari/2011/08/fax-bf75.html