Terry, you're not joking about lead ! There was an old town demolition site in my city about 12 or 13 yrs. ago. An eminent domain take-over by the city, in our blighted bad-side chinatown district. The city tore down some abandoned buildings, and were going to put a garden or something there. We got in their each night after the workers cut out at 5pm, and were having fun getting old cach coins, a few seateds, opium bottles etc....
I found out later than the inspectors found (gasp) lead there! So a big bruhaha developed over "lead contamination". They theorized that yesteryear people used lead in their canning of food containers, or some such nonsense. But I knew as an md'r that it was nothing more than typical lead that you WOULD FIND ANYWHERE. Lead was the 'plastic of yesteryear' after all.
The project spec's got all changed around, and the city decided to remove the top 5 ft. of soil, and re-fill with clean soil. The "contaminated" soil had to be trucked a few hundred miles away to a hazzard site landfill at great expense.
And I had to laugh thinking: If these environmental people had ANY IDEA how much lead is on the average beach (fishing sinkers) they would no doubt shut down every beach . haha