90,000Bq/kg sheets found in a secondary school in Suginami-ku, Tokyo

Someone found the plastic glass sheets used in the secondary school in suginami-ku in Tokyo has the radioactive contamination level of 90,000Bq/kg. I assume these sheets are used for the PE classes since March. I'm curious what happened to the children and the PE teacher. Ah, never mind. These secondary schools in Tokyo was using the pool for the PE classes sine March, and the water contamination limit would be around 300Bq/L or something. They probably have no problem with the sheets. It's just the matter of the time these kids would have more high radio active contamination than the radioactive waste regulation in near future.

Due to the copyright limitation, I cannot share the picture or the article, but you can check them from the below link. (http://www.asahi.com/national/gallery_e/view_photo.html?national-pg/1213/TKY201112130306.jpg)