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of three gallons per minute is interpreted to be adequate to control further off-site migration of <br /> contaminants toward the west <br /> Under EHD directives and approval, a ground water pump-and-treat system began continuous <br /> operation at the site on 02 April 2002, the system has operated for approximately 18 months Over <br /> this time period approximately 2 5 million gallons of impacted ground water was treated and <br /> estimated cumulative totals of 5 69 lbs of benzene and 140 lbs of TPH-g were extracted <br /> TPH-g and BTEX concentrations have decreased in the monitoring well samples over the remediation <br /> period The overall reduction of benzene on- and off-site indicates successful removal of dissolved <br /> hydrocarbons and capture of the oft-site dissolved hydrocarbons,based on monitoring 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 1 3%benzene and 7 5%TPH-g <br /> of the pre-remediation levels <br /> Advanced GeoEnvironmental,Inc <br />