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IV. The Union Pacific R, approximately 400 em The Stockton facility containerized freight Union Pacific. (UPRR) has a train yard of approximately 30 acres in south Stockton with at the Stockton site. a freight hub in the San Joaquin Valley for a variety of freight including: grain, isumer goods), automobiles, steel, produce, and military supplies are transported via Hazardous waste at the tockton UPRR, generates three major waste streams, all due to locomotive and train maintenance.e thr4 waste streams are generated from the following processes: 1) changing the spent qil in the locomotives, 2) changing spent oil filters in the locomotives, 3) cleaning and maintaining the loc motives and rail cars. The changing of the oil land oil filters occurs on cement pads, which are sloped to a drain which flows to a gravity oil water separator and ultimately to the oil water treatment system. The oil water separator #nd treatment system functions are to separate this waste stream into three different types: 1) recyclable wase oil, 2) waste oil sludge and 3) waste water. The recyclable waste oil is reclaimed from the oil/water separator system and stored in large (10,000 gallon and 20,000 gallon) abov ground tanks. This oil is then sold to Evergreen Oil Co., and hauled off site under manifest. The waste oil sludge is a Py product of the oil water treatment system. This sludge is pumped through below grade piping to a tank c4r. Union Pacific hauls this oil sludge via rail for disposal in Council Bluffs, Iowa. The waste water flows i to the City of Stockton Waste Water Treatment System. This water discharge is under permit from the qty of Stockton Municipal Utilities Department. Drum storage of hazardo s waste occurs at several locations, at the Union Pacific Railroad site: The oil water treatment plant, south ed maintenance yard, Railroad Inspection Point (RIP), track maintenance area, and the Motor Freight stora area. The hazardous waste stored at these areas is generally waste oil. Several of the barrels at t e oil water treatment plant and the west end maintenance yard were mislabeled or unlabeled. A few of the improperly labeled barrels contained unknown liquids, two of which smelled like petroleum based solvents. When the waste oil barrels are filled they are transported to the oil water treatment plant for processing and isposal. The amount of hazardous waste generated in 1989 using EPA ID #CAD981385347 was 146,068 tons and EPA ID #CAD982030207 was 78.62. tons. VI. BACKGROUND: Since 1985 Union Pa( pipeline fuel leak in 11. underground fuel line. Railroad has had three incidents related to hazardous waste management: 1) A 2) Asbestos disposal on site int 1988, and 3) Proposed closure of a 4 1/2 mile 2