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tank overburden stockpile (approximately 100 yd') was used as backfill for the diesel tank excavation on May 3, 1996. The two remaining stockpiles (diesel tank overburden and gasoline tank overexcavation totalling approximately 330 yd') were both transported by representatives of Caballero Trucking to the Forward Incorporated landfill in Stockton for disposal. Copies of the transport documents for the seventeen loads of soil are included as - Appendix G. 3.0 Conclusions 3.1 Observations The two UST's (1-4,000 gallon diesel fuel and 1-10,000 gallon unleaded gasoline) were found to be intact upon removal. No petroleum staining or odors were noted in the diesel UST excavation; however petroleum odors were noted beneath the gasoline UST. Detectable gasoline concentrations were encountered in the verification soil samples collected from the center and the east end of the gasoline tank excavation. No detectable petroleum hydrocarbon concentrations were encountered in the verification soil samples collected beneath the diesel tank. Overexcavation efforts were conducted in the gasoline tank excavation, and final verification soil sample analytical results revealed no detectable petroleum concentrations remained. In conclusion, based on review of the soil sample analytical results, it appears that a minor release of unleaded gasoline had occurred at the site; however overexcavation efforts appear to have successfully removed the gasoline impacted soils. As no further detectable petroleum hydrocarbon concentrations have been encountered at the site, no further actions appear to be warranted at this site in association with the removal of the two UST's. 3.2 Reporting Requirements Copies of this report and its attachments should be forwarded to the following regulatory agencies: • Ms. Letitia Briggs and Mr. Harlan Knoll San Joaquin County Public Health Services Environmental Health Division PO Box 338 304 E. Weber Avenue, Third Floor Stockton, CA 95201 6