The Tonolli Corporation site is located in Carbon County, Pennsylvania in a sparsely populated valley between Broad Mountain to the north and Nesquehoning Mountain to the south. The company operated a secondary lead smelter and lead-acid battery recycling facility between 1974 and 1985. The recycling operations included crushing batteries and recovering lead and plastics from them. The 30-acre site included a lined landfill containing standing water, lead-contaminated soil, and battery wastes. In 1985, the owner and the state detected arsenic and cadmium in on-site monitoring wells. The same year, Tonolli filed for bankruptcy.