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4 FLUOR DANIEL GTI sample tubes were sealed with Teflon pads, plastic caps and tape, labeled, placed on ice in an insulated cooler, and transported under chain of custody manifest to WEST in Davis, California for analysis. A total of 16 discreet soil samples were collected from the soil stockpiles. Samples SP-9A through SP-9D and samples C-1 through C-4 were combined into two separate composite samples at the laboratory. The samples were analyzed for BTEX, MTBE, TPH-G, and Total Lead. Table 2 summarizes the analytical results of the samples collected from the soil stockpiles. On September 20, 1996,the approximately 265 cubic yards of clean overburden soil was removed from the site by Ebons Trucking Company. On September 25, 1996,the remaining approximately 415 cubic yards (or 650 tons) of hydrocarbon-impacted soil was removed from the site by Manley Trucking, Inc. and transported to Forward Inc. landfill in Stockton, California for disposal. Soil waste manifests are included as Attachment 7. Horizontal Vent Line Installation On September 26, 1996,two horizontal vent lines were installed on the northern end of the tank pit floor at a depth of 11 to 11.5 feet BGS at the locations shown in Figure 3. Both vent lines are constructed of 4-inch Schedule 40 PVC piping with approximately 20 feet of screened casing. The blank PVC lines extend vertically up the east side of the tank pit and laterally eastward at a depth of 2 feet BGS into the planter where they are stubbed inside a fiberglass valve box. The lines within the valve box are sealed with locking expansion caps and covered with 4-inch-diameter PVC slip caps. Summary and Conclusion On September 19, 1996,two 10,000-gallon and one 6,000-gallon single-walled steel USTs were removed from the site. On September 20 through 24, 1996,the tank pit was extended approximately 20 feet to the south to accommodate the installation of three new 10,000-gallon LISTS. A total of 12 soil samples were collected from beneath the USTs and from the floor of the extended tankpit excavation. A total of 16 soil samples were collected to characterize the soil generated during the tank removal and subsequent excavation. Approximately 650 tons of hydrocarbon-impacted soil was removed from the site and transport to a licensed class three landfill for disposal. Based on the hydrocarbon concentrations reported in the soil samples collected from the tank pit floor, an Unauthorized Storage Tank Unauthorized Release (Leak)/Contamination Site Report, dated September 20, 1996 was submitted to the San Joaquin County Public Health Services Environmental Health Department. A copy of the report is included as Attachment 8. 0384usthr(S1h1-55) Underground Storage Tank Removal Summary October 16,1996 The Southland Corporation,1399 North Main Street,Manteca,CA 4