Making use of Timothy Hay - Pesticide concern

Well, I probably made a big mistake in getting timothy hay, as I have now heard Paul say it is treated with broadleaf herbicides. Any suggestions on how to make use of this organic matter in a way that won't end in me eating petrochemicals or seriously damaging the plants I'd like to grow? I don't know the origin of it, so I have to assume it was probably treated.

I was going to use it as filler and/or mulch in some hugelkultur beds and elsewhere. Now I'm not sure what to do with it. Any advice would be appreciated.

I did find this page explaining how to test for persistent herbicides:

http://www.the-compost-gardener.com/picloram.html#axzz1hqclZIKS

I supposed that will possibly tell me how contaminated the hay may be. I still want to know what health concerns there are for food grown in treated hay, though.