Slide 1: Introduction and Background
INTRODUCTION In 1996, Lockheed Martin acquired Loral Defense Electronics and Systems Integration, which included the former Unisys Corporation site at 1111 Marcus Avenue in Lake Success, NY. The site straddles the border between the Village of Lake Success and the Town of North Hempstead. With the a
Slide 2: Contaminants, Consent Order and Groundwater Cleanup
Treatment systems are in place on the impacted public water supply and irrigation wells, and the water they supply meets the appropriate water quality standards. The primary contaminants of concern in the groundwater are trichloroethene (TCE), tetrachloroethene (PCE), 1,2-dichloroethene (1,2- DCE],
Slide 3: On-Site and Off-Site Groundwater Treatment Systems
Lockheed Martin began construction of this system in 2001, and it began operation in August 2002. A separate Record of Decision for off-site groundwater, released by the NYSDEC in late 2014, approved Lockheed Martin's proposal to upgrade the capacity of OU1 from 730 gallons per minute to 850 gallons
Slide 4: On-Site Soil and Sediment Cleanup
Off-Site Groundwater Treatment System ON-SITE SOIL AND SEDIMENT CLEANUP Soil In January 1994, an interim soil vapor extraction system was installed on-site near the original disposal area to remove any leftover volatile organic compounds from the soil. Responding to the 1997 Record of Decision issue
Slide 5: Sub-Slab Depressurization System in the Main Building
The sub-slab depressurization system [SSDS] ensures safe air quality inside the main building Sub-slab depressurization (SSDS) systems use a vacuum to collect soil vapor below the foundation of a building, treat it, and move the cleaned air to the outside of the building. Lockheed Martin informed bu
Slide 6: LA Fitness Building Vapor Mitigation
LA Fitness Building Vapor Mitigation Vapor sampling in the on-site LA Fitness building began in 2007, with results from the 2008 sampling event identifying the need for vapor intrusion mitigation in the unoccupied basement space of the building. A passive venting system was installed to prevent sub-