Right, I forgot about the Cresote.. Big one... We had the PCB thing here in the 70's and man, talk about problems. Cresote is readily absorbed by most plants and the passed on in the plant to the animal. Good one Dan.O... Weren't PCB's used in creasote in the 60's and early 70'S? Spillage is another issue... Contact your local University and do the sample.