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File No. 20-3978-02.E01 In KLEINFELDER October 30, 1996 REVISED PROPOSAL POND CLOSURE AND RELATED GROUNDWATER SERVICES FORMER SPRECKELS SUGAR PLANT 18800 SOUTH SPRECKELS ROAD MANTECA, CALIFORNIA (APN 243-210-34) INTRODUCTION This revised proposal was developed after discussion with Mr. Jerry Tucker of Spreckels Development Company (SDC) and Mr. Steve Rosenbaum of the State of California, Regional Water Quality Control Board, and is a preliminary understanding of Spreckels Development Company's desires. Kleinfelder is committed to providing quality service to its clients, commensurate with their wants, needs and desired level of risk. If any portion of this revised proposal does not meet the needs of Spreckels Development Company, or if those needs have changed, Kleinfelder will consider appropriate modifications, subject to the standards of care to which we adhere as professionals. Modifications such as changes in scope, methodology, scheduling, and contract terms may result in changes to the risks assumed by Spreckels Development Company as well as adjustments to our fees. We look forward to the opportunity to serve you. BACKGROUND This site was originally developed by Spreckels Sugar Company as a sugar beet processing plant in approximately 1917. The site is located in Sections 3 and 4 of Township 2 South, Range 7 East of the Mount Diablo Baseline & Meridian. Evaporation/Percolation ponds on site were permitted under 1961 Waste Discharge requirements. In 1977, the Waste Discharge Requirements (WDRs) were revised for the existing ponds (RWQCB Order No. 77-247). The waste discharge requirements outlined specific monitoring of the Ponds, Influent, Effluent, and Groundwater. Monitoring was primarily for dissolved oxygen, temperature, pH, total dissolved solids, biological oxygen demand (BOD), chemical oxygen demand (COD), specific conductivity (EC), and flow. On February 27, 1996, John M. Minney of Madera Ranchos, California composed a closure plan for the lime ponds on site. The closure of the remaining ponds on site were not addressed. The plan was very general and did not discuss the specifics of the closure. 20-3978-02.EOIIMP960124 Page I of 7 ©1996 Kleinfelder,Inc.