COMPLIANCE INFO_1997-2008 - Laserfiche WebLink

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MW low in KLEBNFELDER File No. 20-3978-O1.W10 July 26, 1997 operating temperatures. The "used" lime was regenerated for reuse by activated carbon. Eventually the spent lime was disposed of at the lime ponds. After the precipitation of impurities using lime, the raw sugar juice was passed through a series of filters to further purify it. Sulfur dioxide was used to inhibit discoloration of the sugar. After filtering, the raw sugar juice was sent to the evaporators to thicken it. The thickened juice was then sent through a series of centrifuges to crystallize out the sugar. The syrup left after crystallization is molasses. The sugar was then dried in granulators and stored in the sugar warehouse or silos, or ground into powdered sugar. According to W. Tucker, the sugar produced at the Manteca plant was shipped off site in bulk. The various heating and evaporating processes utilized steam produced by the boilers. The boilers on site were fired using fuel oil and/or natural gas. The heated water was cooled in cooling towers. According to Mr. Tucker, the cooling towers on site have never used hexavalent chromium as a scale inhibitor. Process water generated during the manufacturing process was discharged to the wastewater ponds. The waste stream included boiler blowdown, acidic and caustic wastes, and scrubber wastes. After sediment had settled out of the wastewater, the water was reclaimed for use on the crops grown on site. The manufacturing plant equipment required lubrication in the form of industrial greases. Hydraulic oil was also likely used in the plant equipment. The processing equipment was cleaned using acid or caustic solutions. Solvents were used in the machine shop for parts cleaning. Cutting oils were also commonly used in the machine shops. Maintenance activities at the Spreckels Manteca plant also included the repair of motor vehicles such as cars and farm machinery, and the maintenance of a locomotive operated on site by Spreckels. The locomotive maintenance was not conducted at a specific location but was done on the tracks wherever necessary. The Spreckels Manteca property also contains a large amount of cropland, mostly almond orchards and grain crops. The cropland served two purposes: providing a buffer zone between the factory and the adjacent community, and providing a means of disposing of clarified wastewater from the plant via irrigation. The sediment which would accumulate in the wastewater ponds was periodically removed and spread on the feedlot. Beet chips, organic material and dirt removed from the beets was also spread on the feedlot where cattle consumed the edible portion. 20-3978-01.WI0/2017L155 Page 7 of 50 Copyright 1997,Kleinfelder,Inc.