Hi Kimberly,
... Bruce beat me to it :), I was going to suggest mushrooms as well. That is what I get for opening a bunch of posts, and then not responding until later :)
I'm not a soil expert, but I do know that the more alive your soil is, the more likely the nasty elements are going to be locked up in some inert way. I would focus on mushrooms, getting a lot of
carbon added, organic manures,
biochar, and anything to add life.
"The future is something which everyone reaches at the rate of sixty minutes an hour, whatever he does, whoever he is." C.S. Lewis
"When the whole world is running towards a cliff, he who is running in the opposite direction appears to have lost his mind." C.S. Lewis