I dump it on the side of my house that I'm turning into a gravel parking area. There is no Water or electrical piping in that area. Considering the fact I was already buying Casoron crystals to prevent any plant growth under the gravel, Im not worried about the neutralized acid seeping into the area. I'm not a biologist, but I'm pretty sure that the area is flat enough, and far enough away from any water/drain sources that it wont be a problem.