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1999 . ICES observed and documented the UST removal activities and collected soil samples . A permit application for UST closure was submitted to and approved by the San Joaquin County Public Health Services Environmental Health Division (San Joaquin--EHD) prior to the initiation of UST removal activities . Additionally, a permit application for UST removal was submitted to and approved by the City of Stockton Fire Prevention Division. Mr. Michael Kith of San Joaquin-EHD and Deputy Fire Marshall Kent Miller of the City of Stockton Fire Department (Stockton-FD) were present during UST removal activities . Site preparation activities included installing a polyethylene- lined pad adjacent to the UST excavation and excavating and temporarily stockpiling the soil overlying and surrounding the UST. Pulverized dry ice was used to inert the UST by displacing oxygen in the UST at least one hour prior to the scheduled UST removal . The oxygen levels inside the UST were repeatedly monitored with an oxygen/lower explosive limit (LEL) meter. i The UST was removed with a backhoe when the levels of oxygen and explosive vapors inside the UST were considered acceptable and . safe for removal by Stockton--FD. The LEL meter indicated oxygen and LEL levels of 1 . 2% and 3%, respectively. The walls of the r-.. UST were rusty but intact . The drill hole resulting from a previous site investigation was observed at the crown of the UST. The UST was loaded onto a flat bed truck and transported to Erickson, Inc . , a fully permitted disposal facility and registered hazardous waste transporter in Richmond, California. The waste manifest for disposing the UST is included in Appendix A. One soil sample was collected from the floor of the UST pit at a depth of approximately 2 feet below the bottom of the UST. At the request of Stockton-EHD, one four-point composite sample was , collected from the soil stockpile and a second discrete sample I E. . was collected beneath the pipeline located directly adjacent to and east of the UST at a depth of approximately 2 . 5 feet below the existing ground surface . The approximate sample locations ` are shown in Figure 2 . 4. 0 SAMPLE COLLECTION The samples were sent to McCampbell Analytical Inc . of Pacheco, California; and Micro Analytical Laboratories, Inc . of Emeryville, California; both state-certified laboratories . The soil samples were analyzed for: 2 ' 1