Tuesday, October 22, 2013
Strontium-90 in the rainwater, which had accumulated from recent downpours, was above the limit of 10 becquerels per liter near six tank clusters, with the reading in one area reaching 710 becquerels, Tepco said.
It said some of the radioactive water has seeped into the ground, but noted that most of the affected surface water probably didn’t flow to the Pacific Ocean because barrier mounds have been built outside the flood enclosures to prevent water from entering the drainage channels that lead to the sea.
Yet Tepco couldn’t totally rule out that surface water had reached the sea.
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Comment: That last line above - - - - - "Doh!"