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i � AMBRIA approximately 83 fbg and from boring SB-27 at depths of approximately 83, 110, 130,and 150 fbg We had planned to collect groundwater samples from SB-26 at 110, 130, and 150 fbg, but the groundwater sampling equipment could not be advanced to those depths due to the dense soil encountered Number of Borings: Two CPT borings (SB-26 through SB-27) were advanced The boring specifications are described in Table 1, and the locations are shown on Figure 2 The proposed offsite wells S-7 and S-8 were not drilled during this investigation due to the discovery of shallow soil impact, which indicates an offsite source of petroleum hydrocarbons is present beneath the property This is discussed in more detail below I Boring Depths: Borings SB-26 and SB-27 extended to a depth of approximately j 90 7 and 150 fbg, respectively In boring SB-26, drilling equipment refusal was encountered at 90 7 fbg i Groundwater Depths- A pore pressure dissipation test was performed in boring SB-27 to determine the approximate depth to groundwater The test was performed at a depth of approximately 82 fbg The test results indicate the estimated depth to groundwater was 53 5 fbg These data agree with monitoring well water level data at the subject site Soil Classification. Bonngs CPT-26 and CPT-27 were continuously logged using CPT equipment The logging equipment classifies soil behavior type based on relationships between cone bearing, sleeve friction, and pore water pressure Encountered soils are described on the CPT plots presented in Appendix B Chemical Analyses- Soil and groundwater samples were analyzed for total petroleum hydrocarbon as_ gasoline (TPHg), benzene, toluene, ethylbenzene, and xylenes (BTEX), fuel oxygenates [methyl tertiary butyl ether (MTBE), tertiary amyl methyl ether, ethyl tertiary butyl ether,di-isopropyl ether, and tertiary butyl alcohol] 0797 3