I have noticed that the grass over my septic system yellows and dries in a perfect outline of the tank itself. Google searches have explained why this usually happens. I was wondering if it is possible to dig the soil out from over the tank, cover the top with an insulation, say polystyrene tiles or something, then replace the soil?
Would this be detrimental to the tank in any way? I have about 6 inches of soil over the tank and the ky. blue grass fares worst, per expectations. The p. rye and fine fescue seem to do better. I suppose the other alternative is to over seed with this seed exclusively.
Thanks in advance for any advice.
Gary