zxcvbob wrote:

Home Depot has some new pressure treated lumber that's supposed to be
non-toxic; it's treated with ACQ instead of CCA. "Alkaline copper
quaternary." Has anyone heard of it?

Greenhouses have been using 20% copper-naphthenate preservative on
greenhouse benches for decades with no problems. Cuprinol is one
brandname for this product. The copper is no problem. I don't know
anything about ACQ.

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