A 500 gallon septic tank for a cache or small underground shelter.

Correction I bought numerous items and misquoted the cost of the tank. It was $575. The $400 tank is the 300 gallon size. Sorry I think I need to go back to my thinking chair. A 500 gallon septic can be installed to use as a cache or a shelter. Other sizes 1000 and 1500 gallon could be used also. If you are developing your property but it will be some time before you start building put a septic tank in and store survival supplies in case you have to bug out to the property. Make sure you place heavy items in the tank so it doesnt work its way up to the surface. Yes they can pop up with a heavy rain if they have nothing in them.A 500 gallon septic can be installed to use as a cache or a shelter. Other sizes 1000 and 1500 gallon could be used also. If you are developing your property but it will be some time before you start building put a septic tank in and store survival supplies in case you have to bug out to the property. Make sure you place heavy items in the tank so it doesnt work its way up to the surface. Yes they can pop up with a heavy rain if they have nothing in them.