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.,. Exhibit "B" 200607052 Notification of Hazardous Substance Storage, Release or Disposal Property Name of Hazardous Date of Storage, Release, or Remedial Actions Description Substance(s) Disposal Land Tract 2 Explosive waste and Overland runoff and This tract contains a portion of the west drainage ditch. Approximately residues and migration of The west drainage ditch is part of OU2 and receives runoff 91.7 acres of associated groundwater from Load Line 5 (OU4), a portion of Load Line 4 (OU4), land including a chemicals. contaminants from the Sanitary Landfill (OU3), and the eastern half of the portion of OU2. (Released) contamination Burning Grounds (OU5). It also currently receives treated associated with past effluent from the. groundwater treatment plant for OU1. ordnance production and disposal during In addition, low levels of freon contamination in Load Line groundwater under Tract 2 were determined to be present. Operations, Groundwater contamination may have migrated from 1942-1973. various sources on CHAAP, including the Burning Grounds (OU5) to the west of Tract 2 and the Sanitary Landfill and Pistol Range to the southwest of Tract 2. Investigation conducted in 1993 and evaluation performed in 1996 determined that chemicals of potential concern (COPCs) in the west drainage ditch surface soil included aluminum, cadmium, chromium, copper, iron, lead, silver, and vanadium. All of these COPCs were detected at levels below U.S. EPA Region 3 residential soil risk-based concentrations (RBCs), with the exception of iron in a single sample. The concentration of iron was well below the industrial RBC. Investigation and evaluation conducted in 1996 determined that freon was present at low levels in groundwater underneath Tract 2. Freon was not selected as a COPC in the Human Health Risk Assessment and the concentrations of freon in groundwater were far below the U.S. EPA Region 3 tap water RBC. Based on human health risk assessment, the 1996 RI determined that contaminants present in the soil in the west drainage ditch and in groundwater under Tract 2 were not at concentrations that would harm human health and no further action was recommended. A ROD for no further action at OU2 was signed in September 1998. All sites within OU2 are considered to be either uncontaminated or no threat to human health or the environment. The Final First Five- Year Review Report for Cornhusker Army Ammunition Plant (March 2004) indicates that the selected alternative for OU2 (no further action) remains I protective of human health and the environment. *The information contained in this notice is required under the authority of regulations promulgated under section 120(h) of the Comprehensive Environmental Response, Liability, and Compensation Act 9 CERCLA or 'Superfund') 42 U.S.C. S9620(h). This table provides information on the storage of hazardous substances for one year or more in quantities greater than or equal to 1,000 kilograms or the hazardous substance's CERCLA reportable quantity (which ever is greater). In addition it provides information on the known release of hazardous substances in quantities greater than or equal to the substance's CERCLA reportable quantity. See 40 CFR Part 373. EXHIBIT "B" ATTACHED TO AND MADE A PART OF QUITCLAIM DEED (TRACT 2)