Hi,
We had a square made of four large 8' pieces of treated lumber in our backyard that was then filled with pea gravel as a base for a hot tub in our back yard. We got rid of the hot tub and I wanted to dig out the large frame of wood to put a garden bed inside the area where it had been. It had been there for about 20 years, so the pea gravel is mixed in with quite a bit of dirt. I was going to dig down to where there was no more pea gravel and only dirt and put a raised garden bed in there (I was planning on having it 4' x 8' and I was not going to put a liner in the raised bed). My question is whether or not this was safe putting the garden bed where the treated lumber had been for so long?
Thanks
