A word of caution........in areas like PA where precipitation is sometimes heavy, if drainage is not sufficient to disperse water away from the tank -- it will pop up through the sod to the surface like a bobber.I know of at least one person that buried a concrete, non-baffled septic tank in the ground for storage. I have not seen it personally, so I do not know how it is arranged/organized inside, and what was used to seal the lid and ports. This is a great idea if you can facilitate it. Make sure the manhole is big enough so that a person can get down inside to retrieve the containers. A large sheet of plastic over the top of the whole thing should keep water out easily.