「稲わら」サンプリング調査（英語）

Results of radiation sampling surveys carried out on rice straw produced in Hokkaido

○ Currently, radioactive substances are being detected in distributed rice straw produced in the Tohoku and Kanto regions. As a result, the Hokkaido government is carrying out surveys on the use of rice straw in Hokkaido, while implementing sample surveys on rice straw produced in Hokkaido, as a precautionary measure.

○ In the radiation sampling surveys on Hokkaido-produced rice straw taken from four sites in Hokkaido, no radioactive substances were detected in any of the samples.

Survey results

Regions from which samples were taken (Fattening farms)	Region where rice straw was produced	Survey result (unit: Bq/kg)
Regions from which samples were taken (Fattening farms)	Region where rice straw was produced	Radioactive iodine	Radioactive cesium
Oshima	Oshima	Not detectable	Not detectable
Kamikawa	Kamikawa	Not detectable	Not detectable
Tokachi	Okhotsk	Not detectable	Not detectable
Okhotsk	Okhotsk	Not detectable	Not detectable

* Provisional permissible value:

Radioactive cesium – 300 Bq/kg (value converted to the weight of the rice straw before it dries)

Radioactive iodine – no permissible value determined