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I. INTRODUCTION As requested and authorized, we have performed a subsurface soil investigation with regard to the Union Safe Deposit Bank property located at 1725 Sanguinetti Lane, in the City of Stockton, County of San Joaquin, California. The objective of this investigation was to 1) sample and analyze soil from suspect areas identified during a limited phase I environmental site assessment 2) assess whether subsurface conditions had been impacted and 3) determine whether the site might require remediation. II. SITE DESCRIPTION The project site is located on the west side of Sanguinetti Lane, in the city of Stockton, California as indicated in Figure 1: Site Vicinity Map. Existing structures include an unoccupied two-story office/warehouse building, approximately 200-feet in length and 115-feet in width. The structure is constructed of wood and metal framing with a 4 to 6-inch concrete floor slab. The interior of the structure consists of office spaces, a lobby, and three warehouse areas as shown in Figure 2: Site Map. Aside from this structure, the project site is also occupied by two smaller sheds in the northwestern corner of the property. Neighboring properties include a recycling center to the west, H & P Air and Standard Air Conditioning to the north, and Honolulu Freight Service to the south. Central California Traction Company is located across the street to the east. III. BACKGROUND The two-story building located on the project site was constructed sometime in 1966. Channel Air Conditioning, a company which fabricated metal ducts for air conditioning systems, occupied the building from 1976 to 1994. Prior to 1976, the building was occupied by Pehl's Paint Service. Before 1966, the project site may have been used as a goat farm. Penn Environmental performed a limited phase I environmental site assessment for the site; the results of the assessment were presented in a report dated December 13, 1994. Based on the information available at the time of the assessment, the following was concluded: • One underground storage tank (UST) of unknown capacity was previously located on the project site. A letter from San Joaquin County Public Health Services Department indicated that the UST was removed and that no further action was required at the site. • Three concrete-lined pits have been located on the project site for at least thirteen years. Although no documentation was found, it is possible that these pits were used for the disposal of paints and various hazardous waste materials. In addition, the surrounding area appears to slope towards the pits, allowing run-off water which may carry contamination from the surrounding area to flow into the pits. • In order to determine whether contamination exists in the subsurface soil at the project site, Penn Environmental recommended that soil borings be advanced in the following areas: - Adjacent to the three concrete-lined pits (see Figure 2) ; - Adjacent to the former UST location; - Between two floor drains in Area #3; and - In the vicinity of Area 12. - 1 -