The Smuggler Mountain site is located immediately northeast of the City of Aspen in Pitkin County, Colorado. It comprises 110 acres of waste rock, tailings, and slag containing high levels of lead and cadmium. The mining wastes which characterize the site are the result of years of extensive mining, milling, and smelting operations. As a result, wastes are highly dispersed, and little is known about their disposition. Soil is the primary contaminated medium; however, contaminants have been detected in some ground and surface waters. The selected remedial action for the site is broken into distinct operable units. Operable Unit 1 - excavation and permanent onsite disposal of soils with lead above 5,000 ppm, including a RCRA multi-layer cap; soil capping of all areas with lead between 1,000 and 5,000 ppm lead; five-year ground water monitoring; and provision of a permanent alternate water supply for 5-7 residences. Operable Unit 2 - supplemental RI/FS, with possible ground water remediation and mine reclamation activities.