The 4.5-acre Arcanum Iron & Metal (AIM) site is located just outside Arcanum in Darke County, Ohio. A lead battery reprocessing facility operated on site from the early 1960s to 1982. During this time, battery casings were split to extract the lead cores for smelting. Battery acid drained into a low area on site. Reprocessing of the battery casings generated lead oxide sludge that collected on the ground surface. Some lead-contaminated materials were buried in on-site pits. Following cleanup, EPA took the site off the Superfund program�s National Priorities List (NPL) in 2001.