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Chronology Page 3 <br /> 4511 Pacific Ave., Stockton <br /> 10/12/01 Date that the GWE remediation system was initiated. <br /> 214-5103 Two monitoring wells MW-17 and MW-18 were installed off site to further delineate <br /> the MTBE ground water plume during this time. <br /> 'l-0/10/03 Date of Quarterly Report— First Quarter 2003 that reports February 2003 work. <br /> 12/19/03 Date of Remedial Action Work Plan that discusses a proposal to install an additional <br /> GWE well and three soil-vapor extraction (SVE) wells and an SVE system. <br /> 12/23/03 Date of the EHD letter approving the Remedial Action Work Plan dated 12119103. <br /> 03/15/04 One additional GWE well and three soil-vapor extraction (SVE) wells (EW-2, VW-2 <br /> through VW-4) were installed at the site on this date. <br /> i <br /> 08/06/04 Date of Quarterly Report — First Quarter 2004 that discusses work conducted on <br /> 3115104. <br /> 01/13/05 Date of initiation of the SVE remediation system. A total of 5,806 lbs of gasoline were <br /> removed from the site during its time of operation <br /> 04/10/06 Date of the EHD letter approving shut down of the GWE system. <br /> 04/18/06 Date that GWE remediation system was shut down. <br /> 08/06/07 Date that SVE system was shut down. <br /> 08/07/07 Date of Work Plan Addendum (Remediation Plan) Soil Sampling Location. <br /> 09/05/07 Date of the EHD letter approving advancement of soil confirmation borings. <br /> 10/1-11/20/07 Dates confirmation borings B-21 through B-24 were advanced on-site. <br /> 02/19/08 Date of Soil Confirmation Remediation Report which discusses the confirmation <br /> borings which were advanced during October and November 2007. <br /> 10/29/08 Date of the EHD letter in response to the Soil Confirmation Remediation Report. The <br /> EHD directed at least two more quarters of ground water monitoring be conducted <br /> before closure would be considered. <br /> 03/27/09 Date of Quarterly Report -- First Quarter 2009 in which preparation of a closure <br /> summary report was recommended. <br /> 05/08/09 Date of the EHD letter directing that a closure summary report be submitted. <br /> 05/15/09 Date of Closure Summary Report that recommends closure of the site. <br /> k <br /> a <br />