Heavy rains from typhoon Wipha appear to have dramatically raised radiation levels at the stricken Fukushima Daiichi plant. Radioactive strontium, measuring 1,400 becquerels per liter, has been detected in a drainage ditch leading into the sea. This is 70 times higher than was recorded in the same location just a few days earlier. It is believed that the increase was caused by contaminated soil being washed into the ditch.
The legal limit for strontium is 30 becquerels per liter.
Additional concerns were raised a few days later by the discovery of high levels of radioactive Cesium in the groundwater under the plant. Officials reported that one well had 460,000 becquerels of cesium per liter (Bq/l) – 800 to 900 times the previously recorded amount.