Truckers are puzzled by what happens to fuel spills along highways.

This is from a discussion I had two nights ago.

They were describing how they have again and again seen back hoes
digging up fuel spills along the road, loading the dirt into dump
trucks which promptly disappear. They are puzzled about why dirt
needs to be moved somewhere else. They said "what's the point of
just moving it from one place to another?"

I have ideas as to why which I kept to myself at the time because it
would have just started a pointless argument.

However... I'm going to do some internet research to the following
questions:

1. Why do they dig up the dirt.
2. Where do they take it.
3. Why is it important to do it.

So the next time I have a chance to discuss this with them I'll have
some solid knowledge of why and why.

- Jeff -