SITE INFORMATION AND CORRESPONDENCE

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KLEINFELDER File No. 20-3978-01.W 10 July 26, 1997 During a Ainom,ber 19, 1996 monitoring event of the five Spreckels monitoring wells (MW-1 through MW-5) #roundwater was found to exist beneath the site'afadepth of apprdztinatoIy 14 INETr*t. A groundwater gradient and direction was calculated based on depth-to-water data collected from these five and by data collected during a survey by RLC Associates on in December 1996. The groundwater flow direction is estimated-Wbe"toWVd"l !f Telativel' t of approximately 0.002:$7 .-In areas of flat groundwater gradients such as this site, groundwater flow directions may significantly fluctuate due to rainfall, groundwater recharge, groundwater pumping, etc.. Therefore, changes in groundwater flow directions may vary at this site with time. 3.0 BACKGROUND 3.1 Process Description Of Former Operations The 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 were transported from the farm to the processing plant via trucks and railcar. The loaded trucks and railears were weighed at the scales, and the beets were unloaded at the unloading station. The Spreckels Manteca plant most recently used a series of conveyors, but 4ftnaly utilized an OWergroundbeet flumrowhich utilized water to transport the beets from the unloading area to the factory. After unloading the beets were washed. soil and other substances (possibly agricultural chemiesls) and was transported to tlasrrr"NA4 After washing, the beets were sliced and placed into the diffusion towers. The diffusion towers used hot water to remove the sugar from the beets. The beet pulp was then separated from the raw sugar 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. The naw sugar vn*WF Q, "juice" w11 �0►. precipitate out .tlu.,irxipus. The milk of lime is produced by "calcining" the lime in the lime kiln and then adding water. The kiln was lined with a refractory material to withstand the high 20-3978-01.WI012017LI55 Page 6 of 50 Copyright 1997,Kleinfelder,Inc.