The RCA Del Caribe site is located in Barceloneta, Puerto Rico. RCA manufactured masks for television screens at the 20-acre area from 1971 to April 1987. Manufacturing operations discharged wastes � which contained selenium, as well as the metals chromium and iron � into four lagoons. Sinkholes developed in two of the lagoons, discharging about 1 million gallons of waste into the groundwater. Following site investigations, EPA determined that the site did not pose a significant threat to public health or the environment, and no further actions were needed. The site is no longer a threat to human health. EPA took the site off the Superfund program�s National Priorities List in June 2005.