So friggin' what? That's still laughably insignificant, at 0.3 to 0.9 Bq/m³. The typical banana has a potassium 40 activity of 15 Bq (multiply *that* by a couple of thousand to get the Bq/m³ value!). Better stay out of the kitchen! Oh, since there seems to be some confusion in many comments here, Bq simply means decays/sec (of whatever radioactive isotope).
Bananas? Were you not here when the FR community discussed over the course of several months why bananas are not in any way comparable to exposure to radioactive wastes from Fukushima? The nature of radioactive potassium and the body’s response to it is simply not comparable to radioactive cesium, strontium etc. That’s why bananas are harmless compared with radioactive fuels or waste.
approximately 1 bq/m3 is not laughably small. Director of a Japanese institute of isotope therapy was shaking with rage when he queitly demanded to know what Japan was thinking when they set out such high “safe” levels of radioactive waste in food and water etc. stating that medically, bladder cancer rates increase at 2 beq’s per m3 and that’s just in humans. Every living thing in the food chain can be more or less sensitive to radiation in water. And as I’ve said - we haven’t seen the full concentration of Fukushima water yet - we’re just getting the leading edge of a three year dumping of radioactive waste and this will continue for years and years....