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1 Royal Oak Savings & Loan .v g 510 N. Main Street, Manteca, California Final Report and ' Request for Site Closure May 29, 1993 1 ' Site History ' Royal Oak Savings & Loan was the deed holder of this property, a 1 6 acre site on the northeast corner of Alameda and North Main Streets in Manteca, California. The property went into Federal Receivership under the ' administration of the Resolution Trust Corporation In 1985, the underground tanks from an abandoned filling station wCre removed, the San Joaquin County Environmental Health Department determined that a petroleum release had ' occurred Two (2) site investigations were undertaken between 1986 and 1990, one by Harding Lawson & Associates, the other by Canonie Engineering ' MW-1, was the original well installed by Canonie Engineering and at that time Royal Oak Savings owned the property The well was installed directly over the area where the underground tank was removed, and showed an initial ' concentration of 11 mg/l of TPH as Gasoline in the water, and 10 months later, a concentration of 37 mg/1 of total petroleum hydrocarbons (TPH) as gasoline in the ground water The soil samples taken at the time of the well installation showed a maximum level of 4,800 mg/kg of total hydrocarbons as gasoline Wells MW-2, 3 and 4 were all installed at a later date by Harding & Lawson Associates These wells were sampled initially on January 26, 1989 and again in July 1989 Monitoring Well 2 (MW-2) showed a substantial increase between the initial sampling to the second sampling event seven (7) months later MW-3 showed a decrease to a "none detected" level and MW-4 showed a slight increase in the benzene level The property was purchased in 1990 by Village Properties, a land development company with the intent to clean up the contamination and to build a shopping Icenter