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• Site Background Information Chapin Brothers Investements, Inc <br /> Page 12 of 12 <br /> TPH-g and BTEX concentrations have decreased in the monitoring well samples over the <br /> remediation period The overall reduction of benzene on-and off-site indicates successful removal <br /> of dissolved hydrocarbons and capture of the off-site dissolved hydrocarbons,based on monitoring <br /> trend analysis <br /> The remediation-goals presented to the EHD by letter dated 10 August 2001 proposed that removal <br /> of 80 percent of the mass of dissolved hydrocarbons,or diminished remediation effectiveness,would <br /> ' be acceptable clean up goals for the site Presently,at most impacted ground water monitoring wells, <br /> the contaminant concentrations have been reduced to approximately 13%benzene and 7 5%TPH-g <br /> of the pre-remediation levels <br /> 1 <br /> 1 . <br /> 1 <br /> ' Advanced GeoEnviroamentai,Inc <br /> 1 <br />