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GEOMATRIX <br /> ranging from about 66 to 70 feet bgs, and clayey sands and clayey gravels were encountered at <br /> depths from about 76 feet to at least 100 feet bgs (the maximum depth of soil borings). <br /> First groundwater in uncased soil borings at the site was encountered at depths ranging from <br /> about 37 to 45 feet bgs under unconfined conditions during previous investigations. Depth to <br /> lgroundwater has been measured in the groundwater monitoring wells at the Bellini property at <br /> 1 about 32 to 37 feet bgs. Horizontal groundwater flow direction at the Bellini property appeared <br /> to be toward the east-northeast at a relatively flat gradient of approximately 0.005 feet per feet <br /> (26.4 feet per mile) (Geomatrix,2002a). First groundwater was encountered between about <br /> 32 and 50 feet bgs in the soil borings advanced at and downgradient of the Bellini property <br /> during the August 2003 investigation. <br /> 2.4.2 Soil Data <br /> Field evidence of petroleum hydrocarbons in soil (i.e., petroleum odor, PID readings, and/or <br /> -� soil discoloration) was observed at a depth interval between approximately 36 and 80 feet bgs <br /> in the borings as described below: <br /> • on-site borings: <br /> - 36 to 76 feet bgs in SB-15 <br /> - 44 to at least 60 feet bgs in SB-16 <br /> ' - 40 to 80 feet bgs in SB-21 <br /> • off-site borings: <br /> - 50 to 68.5 feet bgs in SB-19 <br /> - 40 to 76.5 feet bgs in SB-20 <br /> The analytical results of the soil samples collected were generally consistent with field <br /> observations. These results are summarized in Tables 2 and 3 and presented on Figure 3. <br /> TPHc was detected in some soil samples collected from six of the seven boring locations <br /> (Table 2): <br /> • TPHc was detected at concentrations between 100 and 440 mg/kg in the shallow <br /> soil samples collected at about 1 and 5 feet bgs from on-site boring locations SB-16 <br /> and SB-17. <br /> ;..1 TPHc was detected at concentrations between 690 and 39,000 mg/kg in the on-site <br /> (SB-15, SB-16, and SB-21) and downgradient off-site(SB-19 and SB-20) boring <br /> samples collected at depths between about 56 and 67.5 feet bgs. <br /> J TPHc was not detected in the off-site soil boring location SB-18. <br /> 1APROIECCR5000A5011.00015011-03.doc 9 <br />