A friend of mine is gonna build me a raised bed and I was wondering if any of you have suggestions about the safest wood for the frame. He mentioned that he was going to use pressure treated wood. I'm concerned about the chemicals. Should I be? Are there other options?

Also, do any of you know about how to test the quality and increase the soil quality? I want to make sure that I'm growing the highest brix veggies and herbs possible. He has some compost but it's not enough to fill the entire bed. I bought some local soil that listed mineral content but I'm not really sure what to look for.

Thanks for any info that you have my most amazing herbal gods and goddesses around!