On Thu, 03 May 2007 12:05:34 +0100, John McMillan wrote:

I'd also be wary of letting fifty litres of oil onto any land ever at
all.

I don't think the OP was suggesting that, just the residue from the sides
of the tank and possibly a small puddle in the bottom after draining the
majority of the 50l out.

Having said that, someone discharged a can of old car engine oil onto
land next door to me about five years ago. To start with it killed
everything within a half meter.

Bear in mind we are talking about a fairly light clean oil here, not used
engine oil which is full of all manner of toxins.

--
Cheers
Dave. pam is missing e-mail