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` h" KLEINFELDER File No. 20-3978-O1.W32 May 23, 1997 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 GUMS by EPA Method 8270, including Tentatively Identified Compounds (TICs) Based on the results of the subsurface assessment, Kleinfelder recommended no "further investigation or clean-up of the railroad spur locations. This does however exclude the apparently isolated area of high soluble lead (58 mg/L at a depth of 0.5 feet). 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)." SCOPE OF WORK Soil Excavation and Sampling Kleinfelder will observe the excavation of a 4 foot by 6 foot by 2 foot deep area of soil in the vicinity of Soil Sample No. 94349 from Boring 6-8 at 0.5 feet (Sequoia Lab ID # S612-1288 a.k.a.. 5702-0487). The soil will be excavated by RAH Environmental of Sacramento, California. At this time, and for purposes of the attached cost estimate, approximately 1 to 2 yards of soil is estimated to be excavated and be stockpiled onto visqueen. Two three-point composite samples will be collected from the stockpiled soil. Two additional confirmation soil samples will be collected within the excavation. The soil samples will be collected by driving a 6-inch stainless steel sampling barrel, lined with a clean stainless steel tube, into the soil. The tube will be removed from the sampler and the ends sealed with Teflon tape and tightly fitting plastic caps. The samples will be placed immediately into a iced cooler. To reduce the potential for cross-contamination, sampling equipment will be cleaned with Liquinox (a phosphate free laboratory grade detergent) and triple rinsed with distilled water between each location. The stockpiled soil will be placed into 55-gallon drums pending analytical analyses. Kleinfelder will 10-3978-01.W32112017P018 Page 4 of 01997,Kleinfelder,Inc.