Radioactive material in sludge found at 16 of 22 prefectures checked

[NNN0LHI]

http://www3.nhk.or.jp/daily/english/14_33.html

updated at 13:42 UTC, Jun. 14

NHK has learned that 16 prefectures in Japan have detected radioactive material in sludge since the crisis began at the Fukushima Daiichi nuclear plant in March.

NHK has found through interviews that at least 22 of Japan's 47 prefectures have been testing sludge for radioactive material. 16 of them, ranging from Hokkaido to Osaka, have actually detected radioactive substances.

The level of radioactive cesium was highest in Fukushima city, at 447,000 becquerels per kilogram. This was followed by Tokyo at 55,000 becquerels and Maebashi, north of Tokyo, at 42,800 becquerels.

[marions ghost]

1. what is the definition of

"sludge'?

[NNN0LHI]

2. Here

http://en.wikipedia.org/wiki/Sludge

[marions ghost]

3. So it's a mixture of industrial waste and human waste?

Of course what I'm trying to say is--what percentage has passed through humans and what percentage is from water and materials that have not passed through humans? (rhetorical question as I know you don't have the answer, but it would be helpful if the article had dealt with it).