Fukushima radioactivity and California

Before the hysteria machine gets all wound up, one should note that Fukushima radioactivity poses little threat to California.  As usual with these sorts of things, background radiation that everyone lives with every day without batting an eye completely washes out the Fukushima contribution.  It's only because of the peculiar isotopes and really sensitive instruments that we can even identify it at all.  The real killer in all this was the circumstance of living too close to the coastline where tsunamis can come through your door.