It turns out that I know something about Porta-potties in Canada. A few years ago I was working in the oil patch in northern Alberta, padding oil leases. We had a porta-potty right near the dirt pit. November was long and steady for us. Porta-potty 'product' doesn't seek its own level like a normal fluid, in the winter in Alberta, so it filled up uncomfortably, quickly. I was sitting in the pit getting loaded when a young fellow came with a one ton to get the Porta-potty, or to clean it out. I watched him open the door and go in. He came right out and I could read his body language. It said "I didn't bring my pick axe'. I got loaded and had to drive away to the new lease so I didn't see any more of the story, but it was gone when I got back. I was partly guilty of wrecking that guys day.