Makes sense, the ground was dug up around the spetic when it was installed and I doubt you'd want to compact it when backfilled. Is another location feasible? It would be eaisiest to put it on level, undisturbed ground. If it must be placed on or near the septic field, you'd need to distribute the weight under the legs over a wider area. Traditional AG pools are built with patio blocks under the verticals dug in flush with the base of the pool. I don't know if this would work with an Intex metal frame type pool as I suspect the legs on a soft side pool move around some. If you do try this, be sure the blocks aren't going to tip up and pierce the liner.