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BACKGROUND <br /> A 550-gallon underground leaded regular gasoline storage tank was formerly <br /> located north of Warehouse Number II at the Sebastiani Vineyards/ <br /> Woodbridge Cellars facility (Figure 2), The pump station was located <br /> approximately six feet east of the former tank location connected by <br /> underground product delivery piping, Mr. Stephen Manildi, Administrative <br /> Manager of the Sebastiani Vineyards/Woodbridge Cellars facility indicated <br /> that the tank was approximately 40-years old. Tank testing, performed by <br /> Jim Thorpe Oil Company on July 23, 1986, showed the tank and lines <br /> certifiable, in accordance with National Fire Protection Association <br /> (NFPA) 329 criteria. A second tank testing, performed by Jim Thorpe Oil <br /> Company on September 28, 1987, also showed the tank and lines as testing <br /> tight and certifiable by NFPA 329 criteria. <br /> In accordance with Sebastiani Vineyards tank management program and due <br /> to the tank's location with respect to future facility expansion plans, <br /> the tank was removed on November 4, 1988, by Claude C. Woods Company of <br /> Lodi, California. Permit Number 88-0053 was issued to Sebastiani <br /> Vineyards on June 7, 1988 by San Joaquin County for the removal of the <br /> storage tank. The removal operation was monitored by Mr. Harlan Knoll, <br /> Registered Sanitarian from the San Joaquin Local Health District (SJLHD), <br /> During the tank removal, a small hole was observed on the bottom of the <br /> tank and gasoline was observed in the soils excavated from under the <br /> former location of the tank. Mr. Knoll filed an Underground Storage Tank <br /> Unauthorized Release (LEAK)/Contamination Site Report on December 12, <br /> 1988. <br /> y Following the tank removal, one soil sample was collected from the tank <br /> excavation on November 4, 1988, by Canonie Environmental Services of <br /> Stockton, California under the direction of Mr. Knoll, Canonie <br /> Environmental Services is certified by the State of California, Department <br /> of Health Services for hazardous waste testing. The soil sample was <br /> collected from approximately eight feet below ground surface and was <br /> analyzed for benzene, toluene, xylene, and total volatile petroleum <br /> hydrocarbons (TVPH) by modified EPA Method 8020; for ethylene dibromide <br /> (EDB) by EPA Method 8010; and for total lead content by EPA Method 7420. <br /> Results of these analyses indicated concentracions above laboratory, <br /> detection levels of xylene, total volatile petroleum hydrocarbons and <br /> lead, as summarized below. Laboratory data sheets for these analyses are <br /> included in Appendix I. <br /> Xylene <br /> TVPH Lead <br /> 600 ppm <br /> 500 ppm 18 ppm <br /> Sebastiani-Vineyards--subsequentlubmttid - <br /> T to SJLHD for the: removal and tr atm nt by aeration of approximately170to 300 cubic yards of soil excavated from the area directly below the <br /> former tank location to a depth of 18,5 feet below ground surface. The <br /> soil removal was conducted on April 6, 1989, and approximately 45 cubic <br /> 3 <br />