To my knowledge, there would be no health concern. That's why we have a regulatory system. It goes through all kinds of studies. In my opinion, it would not be a health concern.
Again, I have to emphasize that I'm very much for supporting organic food, but as for proving that it has better health benefits for a person, I can't find documented evidence. I can see all kinds of studies that say there is no difference, which is fine, but there is very much a difference in the process.