This thread is worthless without pics.
If you're a dope and cannot follow simple instruction--it is worthless.
Here, I'll simplify it for you....
A: Big diameter PVC shedule 40 pipe. 10", 12" etc. inner diameter PVC--it's measured by the inner diameter.
B: Saw it into shorter lenghts--36", 46" etc.
C: Cap off one end with a PVC cap purchased from the supplier--at the same time (buy two).
D: Put your stuff in it.
E: Cap off the other end.
F: Hide it where no one will see it--which means out of sight!
If you use a purple hot primer before your apply the glue--and lots of it, there will be no, absolutely no leakage--not unless the container is crushed, slammed real hard to crack it, etc. PVC is real tough stuff.
Be sure to use lots, and lots of PVC glue. The cans come with an aplicator--a fuzzy ball. Get this sucker sopping, and go to town. Apply the glue on the purple primer (inside the cap should be primed also and glue applied also).
If you really want to make sure--double container it... a container within a container.
But one tube will suffice. This is why I say don't burry it in a place with a shallow water table. You want to look for sandy soil that has good drainage. Dig a hole first and pour in a bucket of water. It the water drains rapidly (less than a minute) this is a good spot. This is the way they test soils prior to installing a septic drainage line.
If the water backs up--no, go. You've probably got clay layers, etc. Look for a better spot.
If you put something under your floor space. Save the top layer of dirt aside. Discard the deeper dirt. To layers have a different color. You want to match and camouflage your location as good as possible.
Any other ideas???