On: In theory, rocks from Oman could store hundreds of...

[lettergram]

That only works for a period of time depending on conditions. In this case, even a few hundred years wouldn't be good enough.

[lbenes → lettergram]

Hundred? If the wood is touching soil, try a few decades at best. I just replaced an old rotted out deck that was all pressure treated lumber. Also EPA considers it a hazardous waste.

https://www.epa.gov/ingredients-used-pesticide-products/chro...