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1 •I <br /> • Shaw Environmental, Inc <br /> 1326 North Market Boulevard <br /> Sacramento CA 95834-1912 <br /> 916 928 3300 <br /> Fax 916 565 4356 <br /> 'Shaw Environmental, Inc Fax (8illers Only) 916 928 0415 <br /> OhQaW' June 18, 2003 <br /> Project No 880-039 lA <br /> Ms Lori Duncan <br />' San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue <br /> Stockton, California 95202 <br /> Re Additional Assessment and Remedial Feasibility Test Report <br />' The Transmission Shop <br /> 515 West Charter Way <br /> Stockton, California <br /> Dear Ms Duncan <br /> On behalf of The Transmission Shop, Shaw Environmental, Inc (Shaw) presents this <br /> report discussing the results of groundwater extraction and air sparge tests, as well as the <br /> installation of one crossgradient well, one downgradient well, and one on-site dual <br /> completion well The purpose of the pump and sparge tests was to evaluate the <br /> feasibility of implementing groundwater extraction or air sparging as remedial options to <br /> compliment or replace the current soil vapor extraction (SVE) system This work was <br /> conducted in response to letters from the San Joaquin County Environmental Health <br /> Department (SJCEHD) dated January 2, 2002 and March 22, 2002, requesting definition <br /> of the vertical and lateral extent of soil and groundwater impact and examine remedial <br /> alternatives to the current soil vapor extraction (SVE) systems for groundwater <br /> remediation at the site The scope of work performed was originally proposed in <br /> IT Corporation's Groundwater Monitoring Well Installation Workplan, dated <br /> March 13, 2002, and Groundwater Monitoring Well Installation Work Plan Addendum <br /> No I And Feasibility Study, dated April 12, 2002 This work was approved by the <br /> SJCEHD in a letter dated May 13, 2002 <br /> A Shaw Group Company <br />