You'd have to really stretch the definition of chemicals here to find any used on my own farm. Same goes for the farm we have a CSA membership with while we get our own produce setup built out.

I have visited the farm we get our CSA from a few times, but not often at all. Its much easier than you might think to meet the person growing your food and have a feel for them as people, their farm, etc. They do also often update on their own website and email newsletter, though again I don't really feel the need to watch them like hawks.

I don't think its much of an investment to actually meet the people making one's food if that really matters to them. Granted finding local farms isn't always easy and I'd love to see more people start, but would you really rather blindly trust a massive public corporation driven entirely by profits and almost certainly buying off the regulators meant to keep up safe in such a system?