Hi, I need to re-grade foundation walls and create slope so that rain water move away from foundation walls. Did some research and come across following article (please take a look link below?) very informative article.
According to it, I should use clean fill dirt around the foundation walls. My question is how I would know by looking at fill if is really clean fill, color, any idea?
I picked fill and guy told me it is clean but I believe it is not. It is all black and kind of little black sand in it