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The Computer Circuits site consists of a one-story building located on a 1.7-acre lot in an industrial section of Hauppauge, Suffolk County, New York. Computer Circuits occupied the entire property between 1969 and 1977. The company made circuit boards for military and commercial applications. Computer Circuits released waste liquids from the manufacturing process to several cesspools near the building. From 1969 to 1991, MCS Realty owned the property and leased it to various companies. Since then, 145 Marcus Boulevard, Inc. has been the owner. Nearby residents get their drinking water from the 60 public supply wells located within four miles of the site.
Between 1976 and 1977, Suffolk County Department of Environmental Control’s water testing found consistently high levels of copper, lead and other heavy metals. A 1976 site inspection also revealed broken barrels, spilled chemicals and sludge deposits on the property. Monitoring wells at the site indicated significant levels of volatile organic compounds (VOCs). Exposure to groundwater contaminated with VOCs may pose a health threat. Because of this threat, residents near the site may not maintain private wells for drinking water. Additionally, on-site surface soils may be contaminated with plating wastes.
In 1976 and 1977, Computer Circuits excavated and backfilled the cesspools on the southeast side of the building. Since then, the site owner has installed and operated a soil-vapor extraction system to remove site-related VOCs. The soil-vapor extraction system is intended to prevent the migration of contaminants into the building. A removal investigation and feasibility study began in November 2001 and concluded in 2007. EPA issued its Proposed Plan in late summer 2007.