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' A S S O C I A T E S I N C <br /> 6.0 DISCUSSION <br /> 1 Based on the analytical results and field observations, soil and groundwater beneath the location <br /> of the former USTs are currently impacted by petroleum hydrocarbon constituents The impacted <br /> soil appears to be generally limited to the upper 50 feet of the soil column although TPHg was <br /> 1 detected at a concentration of 9 2 mg/kg and xylenes were detected at a concentration of 0 21 <br /> mg/kg in the soil sample collected from boring CPT1 at a depth of 91 feet bgs The soil sample <br /> collected from this boring a depth of 121 feet bgs did not contain detectable concentrations of <br /> 1 TPHg, BTEX, or fuel oxygenates Laterally, impacted soil appears limited to an area within <br /> approximately ten feet from the former UST excavation (as exhibited by GP 1, GP2, GP3, CPT 1, <br /> and MW 1 data) <br />' MTBE and the remaining fuel oxygenates excluding 1,2-DCA were not detected in an of the soil <br /> • g xYg g � Y <br /> 1 or groundwater samples collected and analyzed during the 2004 subsurface investigation <br /> In the judgment of ATC, no further action is recommended for the site <br /> i <br /> M <br /> 1 <br /> 1 <br /> • <br /> 1 <br /> i <br /> 1 <br /> 1 <br /> 1 <br /> • <br /> 1 <br /> w\148851reportslSum2004 doe 7 <br /> 1 <br />