A few days ago, we poured a big concrete footing (8+ yards) that's for a retaining wall. There was a supposedly temporary wooden stake and 2x4 in the middle that were propping up some stuff. I got distracted and I forgot about the stake and 2x4 until the concrete was too hard to remove them.
Now the stake is visible (and I think I can find the 2x4 with a little hammer drilling) and I'm wondering if there is any way to get rid of these. They are about 3' long, so pulling and/or drilling them out doesn't seem to be an option. I was thinking that sulfuric acid would dissolve the wood pretty quickly, but that's a lot harder to find than I'd expected. Any thoughts on possible ways to deal with this would be appreciated. Thanks.