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AIL FILE NO. 20-3978-01.WR6 �,■ K L E i N F E L D E R FEBRUARY 24, 1997 1 EXECUTIVE SUMMARY This is a report of Kleinfelder's Limited Soil Assessment conducted in the areas of the railroad spurs on the former Spreckels Sugar Plant No. 2 in Manteca, California. Mr. Mike Atherton of Atherton-Kirk Development, retained Kleinfelder to conduct the assessment in accordance with our contract dated August 27, 1996, and our proposal/subsequent additional authorization dated November 19, 1996. The assessment was done as follow-up services in response to Kleinfelder's "Phase I Environmental Site Assessment, Former Spreckels Sugar Plant, 18800 South Spreckels Road, Manteca, California"report dated October 18, 1996 (Kleinfelder File No. 20-3978-01.P01). On December 26-27, 1996 and January 13, 1997, twenty-seven (27) soil sampling locations along the railroad spurs were evaluated. During our field work, Kleinfelder collected a total of thirty-two (32) soil samples from the 27 locations. Twenty-eight (28) of the 32 samples were subsequently analyzed. The 28 soil samples were analyzed for one or more of the following analytes: • CAM 17 Metals by EPA Methods • Total Extractable Petroleum Hydrocarbons as Referenced to Diesel and Lubricating Oil by EPA Method 3550 and LUFT Method • Organochlorine Pesticides and PCBs by EPA Method 8080 • Chlorinated Herbicides by EPA Method 8150 • Semi-Volatile Organics by GC/MS by EPA Method 8270, including Tentatively Identified Compounds (TICS) Based on the results of the subsurface assessment, Kleinfelder has the following recommendations: 1. Kleinfelder does not recommend any further investigation or clean-up of the railroad spur locations. This does however exclude the apparently isolated area of high soluble lead. Kleinfelder recommends that this area of soluble lead concentrations which exceed the STLC-Regulated Level should be excavated and properly disposed of to improve property marketability. Confirmation soil samples using STLC-Lead analysis should be obtained to verify the adequacy of excavation (<5 µg/kg). However, Kleinfelder recommends that a copy of this report be submitted to the RWQCB and PHS/EHD for their review and comment. Additionally, Kleinfelder recommends that a letter of"no further action"be requested from both agencies. 20-3978-01.WR6/207RE074.dm Page I of 17 0/997, Kleinfelder,Inc.