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r• Soil at a depth of 20 feet bgs in each of the five soil borings contained detectable concentrations <br /> of TPH-as-diesel As such, the lateral extent of impacted soil at 20 feet bgs is undefined, <br /> However, it appears to be defined near the property line to the south of the former USTs (Figure <br /> 4) <br /> Concentrations of diesel and gasoline hydrocarbons were detected in the groundwater-grab <br /> samples collected at each of the five soil boring locations As such, the lateral extent of <br /> impacted groundwater is undefined (Figure 5) The highest concentrations were detected in the <br /> groundwater-grab sample collected from SB-1, located within the former UST excavation This <br /> sample contained 2,700,000 micrograms per liter (µg11) of TPH-as-diesel, 29,000 µg/l of TPH-as- <br /> gasoline, 68 µgll of benzene, 7 5 µg11 of toluene, 130 µg11 of ethylbenzene, 210 µg11 of xylenes, <br /> and 6 5 µg11 of tertiary butanol MTBE, DIPS, ETBE and TAME were not detected in any of the <br /> groundwater-grab samples <br /> The analytical results of the sod sampling are summarized in Table 1 and the results of the <br /> groundwater-grab sampling are summarized in Table 2 The sod and groundwater-grab sample <br /> analytical reports are included as Appendix D <br /> 10 <br />