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' EXECUTIVE SUMMARY <br /> This report was prepared by Mittelhauser Corporation (Mittelhauser) to document the <br /> remediation of soils and the replacement of a monitoring well at the former Unocal <br /> ' Corporation (Unocal) service station #6348 located in the City of Tracy, California <br /> ' Between December 1992 and January 1993 the underground Storage Tanks (USTs) <br /> and associated piping were removed from the site, the station building, service bays <br /> ' and pump islands were demolished and removed, and hydrocarbon-affected soil was <br /> excavated and removed from the site The remediation activities were conducted in <br /> accordance with Mittelhauser's Final Remedial Plan for the site dated September <br /> 1992 <br /> ' With the removal of the contaminated soils, the exposure risk has been reduced to <br /> below levels of environmental concern Unocal formally petitions the San Joaquin <br /> County Health Department for no further action for sods The groundwater at the site <br /> will continue to be monitored and sampled during 1994 to document the effect of the <br /> remediation After four quarters of groundwater sampling and analysis, the site <br /> groundwater conditions should be reevaluated to determine the need for continued <br /> monitoring and sampling <br /> 1 <br /> r <br /> Aiffelhauser <br /> i 0 ¢ v 0 R n T 1 0 N <br /> P216DR008 wpf031941 ES-1 <br />