Oh, DUmmies--to put it into perspective:
One Bq is defined as the activity of a quantity of radioactive material in which one nucleus decays per second.
Which means one curie is 3.7E10 Bq.
Now stick with me here, I'm gonna do a little math. Let's assume, just for shits and giggles, that the iodine detected is all I-131. This means that we're dealing with something with a half-life of 8.019 days, which we'll round off to 8 days.
So exactly how much iodine-131 is needed to produce 11 Becquerels, or 11 decays per second?
To obtain a sample large enough for an initial decay rate of 11 Bq, you'd have to have a sample of 6.9E05 atoms.
Given that 1 mole (6.022E23 atoms) of I-131 has a mass of approximately 131 grams, we can say that:
(6.9E05/6.022E23)*131 = 1.504E-16 GRAMS. That's right, kids. Less than ONE-TRILIONTH OF A MILLIGRAM. Or one-tenth of a MILLION-BILLIONTH of gram.
Assholes.