Lead put back on the earth like this?
The quantity of lead shot, nylon fishing line and other litter discarded at a coarse fishing lake. (lead not lost while fishing, but while trying to put it on the line?)
Or of course if you put it in water it starts to "leach"
Lead emissions from lost fishing sinkers
There is a good summary in this Washington State document: http://198.238.33.67/fish/papers/lea.../fpt_06-13.pdf
Buried in a dry (or at least non acidic) pit... no problem