So I found a old survey that shows a seepage pit possibly where the framework of the pool is going. It says on the survey, pump and abandon the pits. This was part of the old septic system. I would hope the pit was filled when abandoned but who knows? I am literally going off a original survey. Has anyone run into this? My husband is all concerned about the pool going on top of the pit. We need to dig about a foot down for leveling where the pit is supposed to be.