released. ATSDR reviewed a list of proposed alternatives for remediation to determine which of them were adequate for the protection of public health. The landfill was closed in 1987. In 1989, the U.S. Environmental Protection Agency ordered the owners of the landfill to construct a sewer line connecting the leachate collection system to the Naugatuck Municipal Sewage Treatment Plant. The sewer line was installed to alleviate the serious problem of overflow of contaminated leachate from a manhole on the Laurel Park site. This sewer line discharges into the Naugatuck municipal sewage treatment plant. Contamination at the site Soil contaminants taken at the site include dioxins and dioxin-like compounds, benzene, butane, chloroform, ethylbenzene, methane, methyl ethyl ketone, pentane, and toluene. Many of these chemicals are highly toxic carcinogens which are known to cause cancer. No air testing has been conducted. Now that the landfill cap and leachate collection have been completed, there are no threats of contamination due to surface contact. As of September 2008 in the site's latest Five-Year-Review Report, the US EPA raised concerns that the current leachate system is not catching all contaminates, and that contaminants may be migrating off site either into the Unnamed brook that runs behind Andrew Avenue School, or into the bedrock and discharging into groundwater. Groundwater flows northwest and south from the site. The main cause for concern would be residences on Hunters Mountain that are not hooked up to the public water line. Another cause for concern noted by the US EPA is a 200-home development proposed by Primrose Companies of Bridgeport, CT adjacent to Hunters Mountain Road and Andrew Mountain Road. The proposed southern portion of the development abuts the landfill perimeter, and Laurel Park, Inc. has proposed that houses close to the landfill must use passive foundation ventilation systems to mitigate residents from coming in contact with contaminants or gas from the landfill. Superfund status The site was elevated to top Superfund priority status in 1983 after an initial investigation by the CT DEP found that dioxin was in the soil. Cleanup There has been a significant amount of community concern and interest in the site since the early years of landfill operations when open burning occurred. An organized citizens group was very active in the 1980s and played a role in the final landfill closure. A leachate system was built in 1987, but not hooked up to the municipal