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..... " .. ,. 200600526 EXHIBIT B-2 Table 2 - Notification of Hazardous Substance Storage, Release or Disposal Name of Hazardous Date of Storage, Property Substance(s) Stored Release or Remedial Actions Description (S), Released (R) or Disposal Disposed (D) Parcel 8A Explosive Periods of A number of containers of pesticides, herbicides, and other Shop Area compounds and ammunition chemicals from Building S-37 were disposed of by DRMO in 1993 Approximately waste including production through 1994. 32.387 acres 2,4,6-TNT and RDX between 1942 and Investigation of the Shop Area determined that there were of land in laundry 1973 unacceptable concentrations of lead in soil. Soils contaminated with wastewater (Building lead were identified in the 1996 RI in the Shop Area, directly S-4, sumps, open east/northeast of Building S-22. The 1999 ROD identified the ditches, and selected remedy as excavation and off-site disposal of lead- leachfields) (S) (R) contaminated soil to or below the RAO of 400 1-191g, and deed restrictions to prevent residential use. Solvents and paints, Soil excavation activities were performed at the Shop Area (Parcel including lead-based 1942-1990 paint were used and 8A) in June 2000. All confirmation sample lead concentrations were stored in the paint below the RAO for lead. All excavations were backfilled with clean fill. The contaminated soil was disposed of at the Grand Island shop (Building S-22) Municipal Landfill. The selected remedy for lead in soil of excavation (S) and disposal has been achieved. The 2004 Final First Five-Year Paints, pesticides, Review Report determined that the selected remedy for OU3 remains protective of human health and the environment. solvents, oils, and other chemicals in 1942-1990 Beginning in December 2003, decontamination by thermal Paint Spray Shop decomposition and demolition of BUildings S-4 and S-5 in Parcel 8A and pesticide mixing in the Shop Area was performed for residual explosive contaminants. (Building S-37) (S) On October 20, 2004, the contractor performing this work certified that the identified buildings had been decontaminated to a 5X level and therefore the affected parcels of land could be transferred for sale. For the work that is performed in accordance with loep 385.1, the 5X designation indicates that no significant amounts (not enough to present an explosive safety hazard) of contamination remain. Several criteria must be met to achieve the 5X certification. Among these criteria are thermal decomposition of buildings at a sufficiently high temperature and a determination that explosive soil is not present. For the Shop Area sites, the criteria used to determine whether soil was considered explosive was a determination that the soil did not contain greater than 10% by weight of any secondary explosive or mixture of secondary explosives in soil samples. The >10% by weight explosives level is not a measure of toxicity hazard. Toxicity hazards due to explosive chemicals were evaluated in the 1996 RI, 1998 FS for OU3, and 1999 ROD for OU3. In the OU3 ROD, explosive contaminant soil cleanup levels established for the Shop Area include the following: 102 1-19lg of 1,3,5-trinitrobenzene 191 1-19lg of 2,4,6- trinitrotoluene The OU3 ROD determined that no explosive contaminants exceeded the cleanup levels established for the Shop Area. EXHIBIT "B-2" A TT ACHED TO AND MADE A PART OF QUITCLAIM DEED