I see Dow didn't offer to take it away.
I have had mine taken away yesterday. I didn't ask. i called up and said that I had contaminated manure delivered and was calling to arrange collection.
It took a few weeks; but it is now gone. I just have 9 beds with the bad stuff in them; so am using them for crops that do not show effects and hoping that by next year it will have all gone. It will all get a good digging over as crops are removed [so much for organic no dig gardening].
Never ever again.....
