The 3-acre Franklin Slag Pile site is located in Philadelphia, Pennsylvania. The site consists of a covered slag pile containing about 68,000 cubic yards of slag material � a byproduct from the copper smelter at the neighboring Franklin Smelting and Refining Corp. MDC, the operator of the site from the 1950s to 1999, sold the slag as sand-blasting grit. While MDC operated at the site, slag material migrated off the site in all directions. The slag previously covered the nearby rail line and area sidewalks, caked the inside of storm drains, and was observed blowing away from the site. EPA sampling determined that the slag contains leachable concentrations of lead. Additional sampling in 2000 revealed high concentrations of beryllium, copper and lead in the air near the pile. Investigations are under way to determine the nature and extent of contamination, and to identify appropriate cleanup actions.