The grass over the leach field in the front of our house always has problems in dry / hot weather. The last few weeks have left it completely brown, it may be dormant, but it looks dead to me. I need to do something with it because I don't think its ever going to get better, even if it comes back this year, next year it will probably die again.
Just to head off the questions - the problem area is very specific, and matches almost perfectly with the leach field markers. My neighbor who was here when our house was built recently told me the builder put in a plastic sheet over the leech field before the 'top soil' and grass.

Does anyone know of any specific precautions I need to take when I dig up the grass and replace it? Or why the plastic sheet is there? Or if I can remove the plastic sheeting altogether?

Thanks ...