The dross remains today and contains elevated levels of lead.
EPA Sampling in Residential Yards Over decades, mine and smelter tailings and other forms of contamination also reached some residential yards.
The tailings at the IKHS Site contain high levels of arsenic and lead.
These metals can be toxic to humans and wildlife and can be found in soils or sediments, or dissolved in water.
Tailings or particles may have blown in the wind, been used as fill material, or been left in areas that later became yards.