From Tokyo Shinbun, quoting Kyodo News (11/15/2011):
環境省は１５日、福島県内の河川や湖、ダムなど計１９３地点について、底の土壌に含まれる放射性物質濃度の調査結果を発表。東電福島第１原発事故の緊急時避難準備区域に指定されていた南相馬市を流れる太田川の１地点の川底で１キログラム当たり最高６万ベクレルの放射性セシウムが検出されるなど、ほぼすべての地点で放射性セシウムが検出された。
On November 15, the Ministry of the Environment announced the result of the survey of the radioactive material density in bottom soil in 193 locations in rivers, lakes and dams in Fukushima Prefecture. Radioactive cesium was detected in almost all locations, with the highest density of 60,000 becquerels/kg of radioactive cesium in the riverbed soil in the Ota River that runs through Minami Soma City, which was designated as "evacuation-ready zone" after the Fukushima I Nuclear Power Plant accident.
併せて実施した水質調査は、警戒区域内のダムで水１リットル当たり最高２７ベクレルを検出するなどしたが、ほとんどの地点で不検出だった。環境省は「泥や砂の粒子に吸着した放射性物質が沈殿し、土壌の濃度が高くなっている」と分析。
The Ministry also conducted the survey of the water. Maximum 27 becquerels/liter of radioactive cesium was detected in the water from a dam inside the "no-entry zone" [within 20-kilometer radius], but in most locations it was not detected. The Ministry's analysis is that "radioactive materials have been absorbed by sludge and sands and sunk to the bottom, and that is why the radiation density is high [in the soil in rivers, lakes and dams]."
The survey result is not yet uploaded at the Ministry's website.
The provisional "safety" standard for drinking water in Japan is 200 becquerels/liter of radioactive cesium. (For reference, in Belarus, it is 10 becquerels/kg.)
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5 comments:
I like how they switch between bq/kg. and bq/lt. It is a trick they have used with all measurements during this entire event. Keep everyone confounded and nobody will be able to figure out the dangers. This is horrible.
this can't be good
I think they change between Bq/Kg and Bq/lt cause in one cause they are measuring soil contamination and in the other they are measuring water contamination.
and.... one liter of water weighs one kilogram, so essentially its the same. Nobody who uses the metric system would find this info to be particularly confounding.
I would also mention that I don't think the Japanese people should be particularly horrified at 27 becquerels per liter of water inside the "no entry zone".
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