Leo, I think that is a very good point in regards to #1. I put concrete along my edge for 50-100'. Never thought that it may have soaked up bad stuff. Nothing noticeably bad on my part, but who knows. I think in a past thread, there was something along these lines in regards to recycled pallets too. There is definitely a higher PH next to that concrete area, but soon goes down just a little bit away.

Last edited by fish n chips; 07/29/13 06:21 AM.