The SMS Instruments site is located in Suffolk County, New York. The site is the location of an active industrial facility that includes a 34,000-square-foot building on a 1.5-acre lot. The primary operation at the site has been the overhauling of military aircraft components. Overhauling operations include cleaning, painting, degreasing, refurbishing, metal machining and testing. Facility operations contaminated groundwater and soil with hazardous chemicals. After immediate actions to protect human health and the environment, EPA put the site�s long-term remedy in place. EPA took the site off the Superfund program�s National Priorities List in September 2010.