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(concrete Fuel Vault A concrete fuel vault was located In the between adjacent to the boiler building. The fuel vault contained bunker oil. The top of. the fuel Vault was excavated and exposed. The reiraining bunker oil was puirrl)ed out and properly transported off-site under l manifest for disposal. -T-10 inter-orcif the vault was then, cleanedrisirr high-pressure i washers. Tlie rinsate was also transported off-site under rrranifest for disposal. The � interior of the vault was inspected by San Joaquin County Department of Environmental Health. Two holes were core drilled in the bottom of the concrete vault and soil samples were collected from the soils beneath. These samples vvrere collected to corrfirrn that a he sample results were n+�r�-detect. The fuel vault present. T comar�rrnat�d soil was not Fres t p was then filled with clean material and closed-in-place. I The fuel vault liar t�e�en cleaner! and r:lc�secl-in-place, rr-ymaining feet and rinsate has been removed and disposed of, sample results indicate that contamination was not present. CKY does riot recurnmend atly further ac:tiuri at this site. Stockpiled Railroad Ballast Material 1 ' There are two stockpiles of railroad ballast material located at the western side of the property. This material was salvaged during the rernoval of the railroad tracks that run adjacent to the property. Upon the request of San Joaquin County Department of Environmental Health the stockpile Dere sample to determine it the salvaged material.. posed any .threat to public. health. The stockpiles were sampled for the presence of contamination from hydrocarbons, pesticides, herbicides, and PCBs. The $oil samples indicated that the material posed no risks to public health.. See San Joaquin County letter dated March 8, 2004. i '-I CKY does riot reGoiiitriend any further actiort at oris site. 3 of 4