A homeowner has a septic system, and the drain field runs below the house on a one acre lot. Part of the drainfield is in the lower yard, and had been allowed to become grown over with weeds, briars, and little scrappy trees. I manually cleaned up this area, so that grass could be sowed in and make the land more useable and provide more space for her grandkids to play. After I cleared the area, I noticed a low spot where effluent tends to puddle up, especially after it rains. It's only about 2 feet in diameter.
In the hot summer months, it dries up. Outside of hiring a septic expert to dig up the yard and replace the whole thing, is it feasible to just add some gravel and/or fill dirt on this area (it is a low spot) and re-sow grass on top of it to give that area another foot or so to give it a little more "headroom" to percolate? Many thanks to all for your help.