Zone Louisville, KY 40204 | Dragonwerx added on March 26, 2016 | Answered
I have some old wood that was covered in tar paper. Is it safe to use that wood to build raised beds?
Answered on March 27, 2016
I was unable to find any research on the transfer of petro chemicals to wood.
I personally would advise not using any chemical treated material for a raised bed, but I don't think the risk with the wood you mention is even measurable.
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