On Thu, 28 Jun 2007 23:52:36 -0400, Jose
wrote:

The operator told it how many gallons of what to go
where. Different mixes and fuels were sent through the same pipeline
with no one on the other end to either make the switch or to monitor
it.

Is there no diffusion at the boundaries?

I was once told that (for gasoline pipelines at least) it was the
usual practice to put some low grade "slug" gasoline between runs for
different merchants. The slug gas (with a bit of the mixture from
either end) was then sold to the cheap "no name" gas stations.

-Dana
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