another thing, what's to say that if it DID leach into the soil, that it would
be taken up by the veggies?

I don't know the answer, but suspect that very little would be found in the
resulting fruits and veggies.

I'm holding to the premise that your veggies, even if you grew them along side
treated wood, are bound to be far better for you than the garbage you would
otherwise buy at the store.

John