Ok, so I finally tracked down someone with an answer for me. The only nuts we mill are almonds and hazelnuts, there are not peanuts or any other treenuts present in the facility. The ones we do mill are milled on the same equipment. When a mill is switched from one product to another 30 pounds of the next product is put through then discarded before any of it is packaged. So the risk is there, I guess, but very small.