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Stockton Cineplex Site Work plan for Preliminary Risk Assessment and Contaminant Mitigation Page: 4 A 500-gallon waste oil UST was removed from the site on January 14, 1987. The San Joaquin County Public Health Service - Environmental Health Division confirmed the completion of the tank removal investigation for the UST, on February 10, 1994, 125 Bridge Place (not included in project) - The State of California Department of Corrections currently occupies this three-story building for administrative purposes. No electrical transformers or emergency generators were observed or reported within the building. No floor drains or sump pumps were observed within the basement. 145 North Hunter Street-(not included in project) - A market, a small print shop, offices, and residential apartments occupy this two-story building. 145 East Weber Street - The Stockton Hotel formerly occupied this five-story building. Radio stations, along with several small street front businesses along East Weber Avenue, were also previously located within the building. The building has been vacant for approximately 10 years, and last occupied by the County of San Joaquin. A Phase I Assessment by ENSR revealed the following environmental concerns in connection with the subject site: "Gasoline and low levels of gasoline constituents have been detected in soil and groundwater at the former American Savings Bank (ASB) property at 222 North El Dorado Street (Site 44), likely due to its past use as an automobile repair facility." The site has undergone four quarters of groundwater monitoring in 1998. In April 1999, Avalon Environmental Consultants submitted a Site Specific Human Health Risk Assessment report indicating that there is no risk to human health or groundwater from this site based on existing site use and conditions existing at the time of the assessment. Closure of the site was approved in April 2000 by the RWQCB. 1.2 Subsurface Investigation On May 23 and 24, 2000 M.J. Kloberdanz & Associates drilled 9 Geoprobe* soil borings to groundwater, approximately 25 feet in depth. The Geoprobe borings were drilled in the area of formerly identified gas stations, underground tanks, and dry cleaners (Figure 2). Two soil samples and a water sample were collected at various depths in each boring and analyzed by for gasoline, TEPH, and Method 8260B compounds. Analytical results of the site investigation are summarized in Table 1. Diesel and oil range hydrocarbons were detected in two of the soil samples. High concentrations of oil were present in the 10-foot deep soil sample obtained from boring B-8 next to the Police Annex. The 20-foot soil sample and the groundwater sample from this boring were non-detect for oils and other compounds. Boring B-8 is located 15 feet from the American Savings Bank monitoring well MW-3 and is consistent with the soil contamination found associated with the Bank site. As referenced above, closure of this adjacent property was approved by the CWRQCB in April 2000.