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SITE INVESTIGATION Field reconnaissances were performed between June 14 and June 21 , 1989. The reconnaissances included performing a visual surficial observation of the property and conducting an inventory of the surrounding properties and land uses. The warehouse building is currently vacant. The floors and offices are reasonably clean and free of debris. Notable items within the building were a small (1-foot long) compressed gas cylinder tagged as having contained a flammable or explosive gas, a white and yellow crystalline residue covering a 10 ' x 10' floor area, and water leaking into one of the west cooling/drying chambers (see Figure 2) . The compressed gas cylinder and crystalline residue are located in the southeast corner of the building in an enclosure beneath some offices. Although observations were made of the office and warehouse spaces, an assessment of asbestos hazards in those areas was not included in the scope of this investigation. The remainder of the property is, for the most part, paved with asphalt. A narrow strip of land surfaced with gravel is located along the east edge of the property. The lot is generally vacant, except for the storage of numerous stacks of wood pallets. Two trucks and a truck-trailer are also stored on the grounds. The gravel storage area contains the bulk of the wood pallets as well as the two trucks. Also found was a two-foot square, 24-cell battery on a pallette. The battery appears similar to those used in electric forklifts. Ground staining was not evident in the area. The paved remainder of the lot was essentially clear, except for the aforementioned pallets and truck-trailer in the rear of the warehouse building. However, an open 55-gallon drum containing liquid was found along the southern border of the lot. The drum is labeled to contain flammable solvent. No ground staining was evident in the area. The subsurface investigation included drilling three ( 3 ) slanted exploratory borings in the immediate vicinity of the UST' s (see Figure 3 ) extending to a depth of 25 feet below the ground surface. In addition, two shallow borings were drilled to obtain near-surface soil samples in the unpaved storage area. The __. borings were drilled on June 15, 1989 using an eight ( 8 ) inch, nominal diameter, continuous flight hollow stem auger. The soils encountered in the borings were visually classified in the field under the supervision of a State of California certified engineering geologist in accordance with the Unified Soil Classification System (Figure 4 ) . The boring logs depicting the subsurface conditions are presented on Figures 5 through 9. - 3 - BSK Rr Associ itv,;