21,567 Bq/Kg of cesium was measured from the black substance found in Chichibu city Saitama by citizen’s radiation monitoring organization.
From the following up test with Chichibu city and Ogano machi local government, 13,000 ~ 19,000 Bq/Kg of cesium was measured.
It’s reported by Asahi newspaper that the governmental staff in charge commented like this below,
The atmospheric dose is lower than the safety limit of 10,000Bq/h. (so decontamination is not needed.)
The confusing nature of the official’s statement is noted by Fukushima Diary: ‘Atmospheric dose’ or measurement of the cesium concentration in the powder? ‘Bq/hour’ or Bq/kilogram?
Private organizations cesium in excess of becquerel 20 000 per kilogram from black powder found Muse Park Chichibu (Chichibu, town Ogano) in the parking lot [...]Tajima representative sweeps collected about 1 km in the field in the report of the powder residents on November 2. Was measured in three days, it was detected 21 567 becquerels per kilogram. [...] This day is a measure of the powder in the presence of the person in charge and the town Ogano Chichibu. 19,000 becquerels of cesium to 13,000 same has been detected. Personnel showed a wait-and-see strategy decontamination is not “air dose is below the 10 000 becquerel per hour basis province” as.
Pointed out that “radioactive material in excess of 10,000 Becquerel must be managed carefully,” said Tajima representative asked for administrative support. Black powder is said “Do not soil or blue-green algae from reported cases of similar such as Fukushima.”
Watch: Local Official: "People in Tokyo, the black substance is here!" -- "It's on the roof, on the asphalt, on concrete… Everywhere on all surfaces" (VIDEOS)
Published: November 17th, 2012 at 2:28 am ET