Yea, the EPA is completely full of Dookie on this one.
The only safety and toxicity studies they looked at were the ones done by DuPont. And who makes R-134a???
R-12 was great stuff, you could drink it, bathe in it, serve it for dinner - because it was so inert, nothing could break it down. Of course this is why it is busily catalyzing the breakup of the ozone layer...
But R-134a, that stuff is nasty. And believe me there are acute toxicity effects associated with exposure, I took the guy to the hospital.