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LOADING RACK REMOVAL The bulk loading rack was dismantled and removed by BC in August 1998 (Figure 2). The area beneath the loading rack was over excavated by BC and supervised by Apex on September 17, 1998 (Figure 5). The limits of the over excavation were based on-field screening of soil and constraints due to the proximity of the Warehouse. Approximately 300 cubic yards of soil was removed from beneath the loading rack. The 300 cubic yards of soil excavated from beneath the loading rack was transported to Forward Landfill in Stockton, California, for disposal. All _. a . - -- p g - —provided- t' fieldwork was performed according to the Apex Standard-O eratin -Procedure that_is m Appendix A. OVER EXCAVATION & SAMPLING Apex supervised the over excavation beneath T-9 and the excavation of two exploratory trenches by BC on August 17, 1998 (Figure 3). Approximately 100 cubic yards of soil was removed from beneath T-9. The 200 cubic yards of soil excavated from beneath T-9 was stockpiled on-site. One soil sample was collected from the extent of over excavation of T-9 (SS-1@9'), one soil (SS- 2@11') and one groundwater sample (GW-1@11 ) were collected from the northern most exploratory trench on August 17, 1998. Soil and groundwater samples collected by Apex were submitted, under chain-of-custody documentation, to Sparger Technology of Sacramento, California. Soil analytical results are summarized on Table 1, soil stockpile analytical results are summarized on Table 2, and all groundwater analytical results are summarized on Table 3. Sample collection and submittal was performed according to the Apex Standard Operating Procedure that is provided in Appendix A. All certified analytical data sheets and the chain-of- custody documents are provided in Appendix B. Four soil samples (NW, NE, SW, SE) and one groundwater sample (Tank Basin) were initially collected beneath the seven USTs on September 8, 1998 (Figure 4). When BC was exposing these seven USTs, the casing for groundwater monitoring wel11VIW-4 fell into the tank basin excavation and was destroyed (Figure 2). The tank basin for T-1 through T-7 was excavated to remove all"fill material" on September 9 and 10, 1998. Approximately 400 cubic yards of"fill material" was removed and stockpiled on-site. BC removed approximately 300 gallons of groundwater from the tank basin for T-1 through T-7 on September 10, 1998. Apex collected six additional soil samples (Pit-1 Soil through Pit-6 Soil) and two additional groundwater samples (Pit-1@12'(water) and Pit-2@12'(water)) from beneath the tank basin for T-1 through T-7 on September 11, 1998 (Figure 4). The six soil samples(Pit-1 Soil through Pit-6.Soil) were collected at a depth of 12 feet below grade (bg). One soil sample was also collected beneath T-8 on September 11, 1998 (Figure 3). Apex collected rune soil samples (SS-1, SS-2, SS-3, SS-13, SS-14, SS-15, SS-16, SS-17, and SS_ 18) from the extent of excavation beneath the loading rack on September 17, 1998 (Figure 5). Approximately 300 cubic yards of soil was removed from beneath the loading rack.