Subsequent testing indicated that indoor air and sub-slab concentrations at all homes were now below the NYSDOH guideline values. Due to vapor intrusion of VOCs east of Site 1, Air Purifying Units (APUs) had been installed on thirteen homes and sub-slab depressurization systems (SSDs) had been installed on six homes.
Naval action map navigator full#
This groundwater monitoring program also contains a program to determine the need for treatment of public water supplies, where necessary.Īdditionally, the Navy has evaluated the technical and economic feasibility of a full offsite and downgradient containment option for preventing the contaminated groundwater from spreading further. The Navy's alternatives analyses report was issued January 2012.Īdditionally, on July 27, 2011, the New York State Department of Environmental Conservation and the New York State Department of Health approved the Navy’s Residential Soil Vapor Intrusion Home Evaluation and Residential Summary Report (January – March 2011) for the off-site residential area east of the Navy’s Site 1, the Former Drum Marshalling Area. Southeast of the site, the Navy constructed an off-site groundwater hot spot remediation system (GM-38 Area) which was completed in December 2009 and is currently in operation. The Navy is planning installation of monitoring wells which will be used to improve the ongoing assessment of the migration of contaminated groundwater. It is too early to evaluate its performance of the containment system south of Bethpage Park. Northrop Grumman also began operating a containment system as an interim measure at the southern boundary of Bethpage Park since December 2009, with periodic shutdowns for maintenance. The Navy began construction of these deeper borings. The New York State Department of Environmental Conservation (NYSDEC) is the lead agency for this facility. Because of this, the Navy has agreed to construct additional deep profile borings at the on-site containment system to determine whether there may be deep contamination that has not yet been identified. Although the on-site containment system is removing a considerable amount of contamination, there have been questions regarding the efficacy of its performance in deeper portions of the aquifer. Northrop Grumman installed and operates an Onsite Containment System (ONCT), located on the southern side of the former Grumman and Navy site to help control off-site migration of contaminated groundwater that is within site boundaries. Other Names: NWIRP-Bethpage, Grumman Aerospace Corporation, Northtrop Grumman CorporationĬleanup Status: Corrective Action Underway Location: 830 South Oyster Bay Road, Bethpage, New York 11714
0 kommentar(er)
