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depth of approximately 1 to 2 feet below each end of the UST or <br />' the equivalent of approximately 11 feet below the existing ground <br /> surface (bgs) , and two soil samples were collected from the <br />' central portion of the UST excavation at a depth of approximately <br /> 11 feet bgs One grab groundwater sample was also collected from <br /> the groundwater that was encountered at the bottom of the UST <br /> excavation Additionally, two soil samples were collected <br /> 1 beneath the tank piping at a depth of approximately 3 feet bgs <br /> and two composite soil samples were collected from the stockpiled <br /> material <br /> Analysis of the UST excavation floor soil samples indicated that . <br /> o Total petroleum hydrocarbons (TPH) as gasoline (TPHg) <br />' concentrations wer& less than 1 . 0 mg/kg (not detected) <br /> o TPH as diesel (TPHd) concentrations ranged from less than <br />' 1 . 0 mg/kg (not detected) to 3 , 200 mg/kg <br /> o Benzene, toluene, ethylbenzene, and xylenes (BTEX) <br /> concentrations were less than 0 005 mg/kg to 0 . 025 mg/kg <br /> (not detected) . <br /> o Oxygenate concentrations were less than 0 010 mg/kg to 2 0 <br /> mg/kg (not detected) <br /> o Lead concentrations ranged from 5 3 mg/kg to 5 8 mg/kg. <br /> Analysis of the grab groundwater sample indicated that: <br /> o TPHg concentration was less than 50 . 0 ug/L (not detected) . <br /> o TPHd concentration was 4, 400 ug/L. <br />' o BTEX concentrations were less than 0 . 3 ug/L to 0 . 6 ug/L <br /> (not detected) <br />' o Oxygenate concentrations were less than 0 5 ug/L to 40 . 0 <br /> ug/L (not detected) <br />' o Lead concentration was less than 5 0 ug/L (not detected) <br /> Analysis of the soil samples collected beneath the tank piping <br /> indicated that. <br />' o TPHg concentrations were less than 1 . 0 mg/kg (not <br /> detected) . ' <br /> o TPHd concentrations were less than 1 . 0 mg/kg (not <br /> detected) . <br /> 2 <br />