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, . 200600526 EXHIBIT B.1 Table 2 - Notification of Hazardous Substance Storage, Release or Disposal Name of Hazardous Property Substance(s) Date of Storage, Description Stored (5), Release or Remedial Actions Released (R) or Disposal Disposed (0) 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, explosives were not determined to be contaminants of potential concern (COPCs) for the Nitrate Area; therefore no cleanup levels were established for explosives at this Area of Concern (AOC). Soil cleanup levels for explosives that were established for other OU3 AOCs Include: Shop Area 102 micrograms per gram (l..Ig/g) of 1,3,5- trinitrobenzene 191 I..Ig/g of 2,4,6- trinitrotoluene Pistol Range 52 I..Ig/g of RDX Sanitary Landfill 123 I..Ig/g of 2-amino-4,6-dinitrotoluene 123 I..Ig/g of 4-amino-2,6-dinitrotoluene 8.42 I..Ig/g of 2,4-dinitrotoluene 8.42 I..Ig/g of 2,6-dinitrotoluene 1,022 I..Ig/g of nitrobenzene 52 I..Ig/g of RDX 191 I..Ig/g of 2,4,6- trinitrotoluene The chemical analyses of soil performed to determine whether explosive soil was present as part of the 5X certification effort can be compared to soil cleanup levels for explosive chemicals that have been established for the various OU3 AOCs. This comparison shows that for soil analyses performed as part of the 5X certification effort for building sites in the Nitrate Area, all of the analytical results for chemicals that have an established cleanup level for an OU3 AOC were less than the respective cleanup level. Groundwater results from perimeter wells indicate that operations at the Nitrate Area have not impacted groundwater.