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Treadwell&Rdlo excavation where the bottom intersected the water table No elevated compounds were detected I in the other confirmation samples The pump island excavation and confirmation samples are illustrated in Figure 2, and results are discussed in Section 5 4 The final excavation dimensions ' were approximately 25 feet wide by 22 feet long with an average depth of 10 feet 5.4 Soil and Groundwater Sampling and Analyses Table 1 presents the analytical results for soil, and Table 2 presents groundwater results for the shored UST area excavation, and for the previous soil boring investigations Table 3 shows the results from the pump islands excavation Appendix B presents the laboratory analytical results 5.4,1 Sampling at the Shored Excavation In soil confirmation sample CPT-EXC-BT, TPH-g and TPH-d were detected at 11 mg/kg (Table 1) Toluene, ethylbenzene, and xylenes were detected at 0 051, 0 12, and 0 062 mg/kg respectively(Table 1) In groundwater confirmation sample CPT-EXC-W, TPH-g and TPH-d ' were detected at 16,000 and 2,700 gg/L,respectively(Table 2) BTEX compounds were also detected in the groundwater sample at 46, 74, 420, and 1,390 gg/L,respectively(Table 2) 5.4.2 Sampling at the Pump Island Excavation rAs shown on Table 3, TPH-g beneath TP-A ranged between 1,000 mg/kg in CPT-PI-A4 to 2,000 mg/kg to CPT-PI-A10 TPH-d beneath TP-A ranged between 670 mg/kg in CPT-PI-A10 to ' 1,300 mg/kg in CPT-PI-A4 Ethylbenzene and xylenes were also detected beneath TP-A in concentrations that ranged from 1,200 to 12,000 mg/kg and 3,700 to 35,000 mg/kg, respectively TPH-g concentrations beneath TP-B ranged between 13 mg/kg in CPT-PI-B10 to 550 mg/kg in ' CPT-PI-B4 TPH-d concentrations beneath TP-B ranged between 5 5 mg/kg in CPT-PI-B l0 to 580 mg/kg in CPI-PI-B4 Ethylbenzene and xylenes were also detected in CPT-PI-B4 at 520 mg/kg and 1,730 mg/kg, respectively r 25971020 DGD 8 23 August 2004