Pressure Treated Wood and Arsenic in Soil
I have recently moved into a home and am anxious to create garden spaces, especially for food. There are several beds along the foundation that are contained by well-crafted borders of 6x6 lumber. It's pressure treated, and most likely from the day before arsenic was outlawed in lumber.
I would appreciate any advice on how to proceed. I have limited funds to spend on this. I've been researching but have yet to find any definitive answers.
Should I spring for soil tests? Should I replace the wood? Should I line it with something? Do I need to replace the soil? Is the amount of arsenic minimal from this kind of wood given overall environmental contamination? I'm interested in edible landscaping and food gardening. Thank you in advance for sharing your experience and knowledge.