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• File No. 20-3978-02.E01 kl KLEIN FELDER October 30, 1996 On August 19, 1996, the RWQCB responded to the April 24, 1996 closure plans by John Minney. In the review letter, the RWQCB stated that the closure plan by Mr. Minney was incomplete, and requested a detailed Report of Waste Discharge and a detailed Closure Plan for their review. The intent of this revised proposal is to discuss Kleinfelder's project approach, scope of work, costs and time schedule for acquiring the additional data need& and composing a revised closure plan. PROPOSED SITE USE Overall, the former Spreckels site will be redeveloped for residential, commercial and industrial use. The area in which the mud ponds, lime ponds and wastewater ponds currently exist will be redeveloped as industrial land. The residential property will be limited to the area in the northwest corner of the site. That area is currently an almond orchard. For additional information, please refer to the attached reduction of the tentative map for the Spreckels Subdivision. SCOPE OF WORK Task 1.1 Pond Closure Evaluation Workplan Kleinfelder would prepare a workplan for submittal to the State of California Regional Water Quality Control Board (RWQCB) for the evaluation required prior to pond closure. These requirements are stated in Subchapter 15 of Title 23 of the California Code of Regulations. Currently, we would propose the following scope of work in a detailed workplan which would be submitted to the RWQCB. The proposed evaluation of the ponds would include: 1. Advancing a boring within each of the four existing lime ponds to a depth of 40 feet below existing grade. Lime samples from the upper 20 feet and soil samples from the lower 20 feet would be obtained at five foot intervals for logging purposes and potential chemical analysis. The samples obtained from the surface, and depths of 10 and 20 feet below ground surface in each boring would be composited into a single sample for chemical analysis. The single sample from each boring would be analyzed for the presence and concentration of pH, total chloride, total barium, total arsenic, total sulfate, soluble chloride (DI water extraction), soluble barium (DI water extraction), soluble arsenic (DI water extraction) and soluble sulfate (DI water extraction). Additionally, the soil samples obtained from beneath the pond at boring depths of 30 and 40 feet would each be analyzed separately. The soil samples from beneath the ponds would be analyzed for pH, total chloride, bicarbonate, total arsenic, total 20-3978-02.E01/MR960129 Page 2 of ©1996, Kleinfelder, Inc.