Posting this because it is very important to big and small gardeners.
Grazon is the chemical you need to worry about as if we didn't have enough of them to worry about.
It can be found in straw and hay and in any animal manure that has consumed the affected straw or hay. It can damage your garden for up to 10 years and is especially destructive to tomatoes and beans. From what I have read if the person responsible did not warn you of the danger they can be held legally responsible. But that would be for a court to decide.
Here are some links that may be helpful
https://thegrownetwork.com/rescue-ga...contamination/
https://www.youtube.com/watch?v=A6pI4KA47kI&t=224s
https://www.youtube.com/watch?v=XTqzYo04_bw