I haven't read the thread, but I'll throw my thoughts out there.
I'm OK with overturning the ban, as long as the other (less well-known) guys nicked for tiny amounts of Clen have their bans overturned as well. While I know it's 'the rule', it's a stupid rule, IMO. Trace amounts of something which legitimately could be from contaminated food or water should not result in bans. I don't know an appropriate threshold level, but it should certainly be higher than the amount in Bertie's blood.
On the other hand, I think the science behind the plasticizer test is solid, and I think he (and the rest of the field) should be evaluated on that front.
If he's going to be sanctioned, he should be sanctioned for something which actually improves performance and the sanctions should be handed out across the board, not just to him, because I doubt he's the only one with funny results from his platicizer test. My $.02.