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qW FILE NO. 20-3978-0 L WR6 k" KLEINFELDER FEBRUARY 24, 1997 3 BACKGROUND Kleinfelder has conducted a Phase I Environmental Site Assessment (ESA) of the property known as the Former Spreckels Sugar Plant in Manteca, California (Kleinfelder Job No. 20- 3978-01.1`01, dated October 18, 1996). Plate 1 shows the locations of the Spreckels property. 3.1 PROCESS DESCRIPTION OF FORMER OPERATIONS The subject site is the location of a former beet sugar processing plant. The description of the manufacturing process was provided by Mr. Jerry Tucker of Spreckels Development Co. during the site reconnaissance. Mr. Tucker's description has been supplemented by information posted to the Internet by Monitor Sugar Company. Sugar beets are transported from the farm to the processing plant via trucks. The loaded trucks are weighed at the truck scales, and the beets are unloaded at the unloading station. The Spreckels Manteca plant most recently used a series of conveyors, but formerly utilized an underground beet flume which utilized water to transport the beets from the unloading area to the factory. After unloading the beets are washed. The wash water will contain dirt and or other substances (possibly agricultural chemicals) and is transported to the mud ponds for disposal. After washing, the beets are then sliced and placed into the diffusion towers. The diffusion towers use hot water to remove the sugar from the beets. The beet pulp is then separated from therawsugar water. At the Spreckels Manteca plant, the beet pulp was dried and stored in the pulp warehouse pending use as cattle feed. Several different feedlots have been present on the , Spreckels property for this purpose since the plant was constructed. Prior to the installation of pulp dryers, the wet pulp was pumped into a large holding pond, formerly located to the east of the existing pulp warehouse, and allowed to dry prior to use as cattle feed. The pulp dryers were installed to reduce odors emanating from the plant. 10-3978-01XR61107RE074.doc Page6of17 ©1997, Kleinfelder,Inc.