"Elmo" wrote in message
...
Duane Bozarth wrote:
PrecisionMachinisT wrote:
...

Back to the oil--always seems to dissappear within a year or so from my
gravel drive, and I find it hard to believe its all being washed away by
the
rain...


The area where we drained oil from tractors and trucks from as far back
as the 20s until toughly the 70s or 80s is now covered in grass and is
indistinguishable from that area surrounding it...when I was a kid it
looked like almost like a paved road. It's broken down pretty well.
Not a smart thing to have done, certainly, and I suspect a soil sample
would show some residual, but certainly doesn't appear permanent....

As I understand it, the problem is not so much what it does to the soil
that it
leaches through as what it does to the water table when it gets down
there.



The oil itself is not a problem, IMO unless the environment is overwhelmed
with it.

Besides.....because oil floats on water, I think I would be more concerned
with any additives and residual contaminents that may come out of
suspension.......

--

SVL