First time we’ve known for sure. Because it’s finally turned up.
Over 3,000 Bq/kilogram combined Sr-89 and 90? I don’t know the general residue due to bomb testing, but it’s not that high. Not nearly.
They announced today, from samples taken three weeks ago. No, I don’t know how this wasn’t seen two months, or even a month ago.
I’d offer them the excuse that perhaps hot debris had to be cleared away for human access to take samples. But that distance is 500 meters away from the stack. And if they’re seeing that much there, you’d expect them to have found lesser amounts further away. That amount is 700 times their lower limit of detection.
Of course, to do that they’d need to be sampling everywhere they could access. And TEPCO hasn’t exactly filled us with confidence.