The acceptable level for Clenbuterol is ZERO. Any level above that is a fail.
That is true.
The point philipbh is making, and justifiably so imho, is that the lab that detected it is able to detect far far smaller quantities than any other approved lab. So? you ask. Still more than zero. That's guilty as charged m'lord. And, of course, you're right. Well, if that sample had gone to
any other approved lab it would have come back negative. Equally, presumably, other samples from other riders went to other labs. Is that fair? Is that 'level playing field'?
The UCI (or WADA, whoever) sets standards for labs. Personally, I feel those standards should be the defacto standards for riders too. I think it has to be that way to avoid different detection systems and luck of the draw testing.
I'm not saying that Contador is innocent, because I don't think he is, but you can't have a fair testing system if the results depend on who does the testing. I don't think that's just.