On a per gallon basis gasoline is the second cheapest liquid you can buy.
Tap water is the first.
Yeah, it’s a real steal. In this case, literally.
Oh...I don't think so. I used to work as a test engineer for a company that made municipal sewerage processing equipment. At some point in the development process it was necessary to test new designs with raw sewerage. You guessed it, we would have to pay a septic tank pumper to drive his "honey wagon" down to our local sewerage processing plant and bring back a couple thousand gallons. Since we payed him about $100 per trip that works out to about a nickel a gallon.
Since the stuff he brought back was technically not "raw", having been in transit through the underground conduits for three days or more and had begun the anaerobic digestion process, it was necessary to develop other sources. We finally built an "outhouse" with a flush toilet, magazine rack, electric lights and a locking door. It was actually the only two story outhouse I've ever seen. The plumbing below was connected to a heavy duty garbage disposal unit which discharged into a fifteen gallon carboy. The drill went like this: Close door, do your thing for science, flip on the grinder, flush. Do to the limited storage it was necessary to keep an eye on the carboy and change them out as needed, hence the lock on the door! Imagine the look on the technician's face (who forgot to lock up) as he was switching the hose from a nearly full carboy to an empty when he heard the whirr of the grinder and almost simultaneously the gurgle of the flush.
Our motto was: "It may be S#!t to you, but it's our bread and butter!" I Still think of that incident every time I hear "What can Brown do for you?"
Regards,
GtG