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1 A <br /> • <br />' o BTEX concentrations were less than 0 005 mg/kg (not <br /> detected) <br /> o Oxygenate concentrations were less than 0 010 mg/kg to 0 4 <br /> mg/kg (not detected) . <br /> 1 o Lead concentrations wers less than 5 0 mg/kg (not <br /> detected) <br /> Analysis of the composite soil samples collected from the <br /> stockpiled material indicated that : <br />' o TPHg concentrations were less than 1 0 mg/kg (not <br /> detected) . <br /> o TPHd concentrations ranged from 6 , 030 mg/kg to 6, 330 mg/kg. <br /> o BTEX concentrations were less than 0 005 mg/kg (not <br /> detected) . <br /> o Oxygenate concentrations were less than 0 . 010 mg/kg to 0 . 4 <br /> mg/kg (not detected) - <br /> 0 Lead concentrations were less than 5 0 mg/kg (not <br /> detected) <br /> Soil samples collected beneath the UST and stockpiled material <br /> indicated low to non-detectable concentrations of TPHg, BTEX, <br /> oxygenates, and lead, and non-detectable to elevated <br /> concentrations of TPHd The grab groundwater sample collected <br /> from the UST excavation contained non-detectable concentrations <br /> of TPHg, BTEX, oxygenates, and lead, and an elevated <br /> 1 concentration of TPHd. The soil samples collected beneath the <br /> tank piping contained non-detectable concentrations of TPHg, <br /> TPHd, BTEX, oxygenates, and lead. The stockpiled material <br /> containing the elevated concentration of TPHd was disposed at <br /> Forward Landfill (Forward) of Manteca, California Approximately <br /> 687 tons of petroleum-affected material was disposed at Forward <br /> The above results indicate that the sediments within the <br /> immediate vicinity of the UST were primarily impacted by TPHd <br />' 4.0 SOIL AND GROUNDWATER INVESTIGATION <br /> Soil and grab groundwater samples be collected from four onsite <br /> boring/hydropunch locations (SB-1 through SB-4) The approximate <br /> boring/hydropunch locations are shown in Figure 2 . <br /> 3 <br /> 1 <br />