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i <br /> j <br /> CHRONOLOGY <br /> TRACY COLD STORAGE <br /> 24500 MACARTHUR DRIVE, TRACY <br /> i <br /> 07/24/94 REMCOR "Work Plan for Environmental Assessment". One area to <br /> be assessed was the former location of a UST that was reportedly <br /> removed in the 1970"s. <br /> 8/4-5/94 REMCOR supervised the drilling of seven soil borings, three of <br /> which were converted to monitoring wells MW1, MW2, MW3. Soil <br /> borings SB4-SB7 were in the septic and brine areas. f <br /> Contamination found in the former UST area. <br /> I <br /> 8/23-25/94 REMCOR supervised the drilling of seven more soil borings and the <br /> installation of 3 more monitoring wells (MW4, MW5, MW6) to <br /> investigate the contamination in the former UST area. <br /> I <br /> 03/09/95 REMCOR "Preliminary Investigation & Evaluation Report" for work <br /> performed 8/94 <br /> 06/22/95 American Geological Services.(AGS) started quarterly monitoring of '. <br /> the site monitoring wells. <br /> 03/08/96 AGS supervised the installation of monitoring wells MW7, MW8, <br /> MW9. MW9 was installed to investigate the vertical extent of the <br /> contamination. <br /> 06/19/96 AGS conducted a vapor extraction test. <br /> 08/22/96 AGS "Report Additional Soil & Groundwater Investigation" <br /> discusses remediation options for the site and recommends <br /> excavation. <br /> 12/16/96 Stockpiled soil from the borings and monitoring wells was sampled. <br /> 01/13/97 AGS "Work Plan For Remedial Soil Excavation and On-Site <br /> Aeration", the work was proposed to be performed in 1998. <br /> 04/04/97 EHD letter approving the stockpiled soil from the borings & <br /> monitoring wells be spread on site. <br /> 05/11/98 EHD Public Notification of proposed Corrective Action. <br /> 06/25/98 Monitoring wells.MW 1, 1MW2, MW3, MW4, MW8 destroyed. <br /> i <br /> I <br /> I <br />