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, Property Description Load Line 2 Adjacent part of Tract 36 overlying plume Approximately 261 acres ofland 200809097 Exhibit "B" Table 2 Notification of Hazardous Substance Storage, Release, or Disposal Load Line 2 and adjacent part of Tract 36 overlying groundwater plume Load Line 3 and ad.iacent part of Tract 34 overlyin~ ~roundwater plume Date of Storage, Release, or Disposal 1942-45 1950-57 1965-73 Name of Hazardous Substance(s) Stored (S), Released (R), or Disposed (D) Explosive- contaminated waste, and residues including: 2,4,6-trinitrotoluene (2.4.6- TNT) Cyclotetra-methylene- tetranitramine (HMX) hexahydro-l,3,5- trinitro-l,3,5-triazine (RDX) (S) (R) (D) Explosives breakdown products include: 1,3,5-trinitrobenzene (1,3,5-llSnB),2-amino- 4,6-dinitrotoluene (2- Am-4,6-DNT), 4- amino-2,6- dinitrotoluene (4-Am-2,6-DNT),2,4- dinitrotoluene (2,4- DNT), and mono- nitroso-RDX (MNX) (R) Asbestos (D) Unknown Remedial Actions There were no production operations and there is no known soil contamination on the property outside the fenced boundary of Load Line 2. Remediation of explosives-contaminated soil associated with Load Line 2 has occurred during multiple remediation projects in 1987-88, 1994,2001-2003, and 2006. All contaminated soil that was determined to exceed industrial risk soil remediation levels has been removed from former Load Line 2. A portion of Load Line 2 and an adjacent portion of Tract 36 overlie a plume of groundwater contamination. Groundwater contaminated with explosives is being remediated through a pump and treatment plant. Operation of the groundwater pump and treatment plant is expected to continue for some years into the future and will not be discontinued until regulatory approval to do so is requested and received. Annual groundwater monitoring and evaluation also continue. In an effort to more quickly reduce au 1 groundwater contaminant levels, a project involving subsurface injection of groundwater amendments began in December 2006 and is ongoing. The project involves pumping amendment solution under pressure into the aquifer through direct push rods. Temporary monitoring wells are installed for performance monitoring at selected locations. Four months after injection activities are conducted, ground-water samples are obtained from the temporary monitoring wells and analyzed to determine the effects of the groundwater injection. The temporary monitoring wells are then abandoned. The buried debris areas that were discovered on Load Line 2 as part ofthe MEC geophysical investigation contained some asbestos-containing material (ACM), along with other debris such as burned wood, bricks, metal cans and glass. These debris areas were excavated to a minimum depth of 4 feet and the ACM properly removed and disposed of in June and July of2006. The debris remaining in the buried debris areas contains less then 1 % of ACM by volume. U.S. EPA defmes asbestos-containing materials as materials containing greater than 1 percent asbestos. All known buried asbestos debris areas have been properly removed and disposed of and the remaining ACM does not currently pose a hazard to human health or the environment. Pae:e 1 of 2