As far as the buried tanks and to keep them buried when there is a high water table.
They poured a couple of concrete anchors with anchor bolts or studs. then there are 2, 4" X 3/8" thick steel bands that go over the tank and hook to the concrete.
Also depends on amount of earth over the tank. get enough and it will stay down.
They poured a couple of concrete anchors with anchor bolts or studs. then there are 2, 4" X 3/8" thick steel bands that go over the tank and hook to the concrete.
Also depends on amount of earth over the tank. get enough and it will stay down.