Want to emphesize that ALL gasoline has some water in it. It leaves
the refinery with some non-zero amount. It's stored in floating roof
tanks [1] that will let some in. It's in a truck in the rain... it's
there.

The question is getting rid of same.

We all know how -- let it sit quietly and it shall settle out. Then
open the bottom drain and watch. That might be under your wing, or
on a tank or inbetween...



[1] Gas does not go kabboom; gas vapor does. So it's stored not in
tanks as much as 4 million gallon cylinders with closed bottoms.

On top of the gas there's a big heavy floating roof that has a gasket
all the way around the edge. It floats directly atop the gas; ergo
no vapor space.

Then there's a sliding ladder deal so the pipeline operator can
climb up over the cylinder lip and back down onto the roof.

BUT, with the tank half full; there's a 2 million gallon trap atop
the roof to collect rainwater and snow; some of which leaks past
that gasket. Most is SUPPOSED to go through an articulated downspout
gadget INSIDE the tank and out the side at the bottom; but that's
only when the temperature is well above freezing...and they leak
a little too...

This was obvious to many pilots & few ground-dwellers, but now many
of the tanks also have a cap on top to keep some of the rain and
snow out. I was looking for a GoogleMap photo and all the ones I
worked on are now capped.



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