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1.w <br /> SITE CHRONOLOGY <br /> UNOCAL SERVICE STATION(FROMER SCOTTY'S) <br /> 574 GRANT LINE ROAD, TRACY, CA <br /> LOP SITE CODE: 1405 <br /> CVRWQCB CASE 9 390592 <br /> APN: 23303001 <br /> 01/23/1998 EHD filed an Unauthorized Release Report(URR) on this date for <br /> contamination discovered during a UST inspection. <br /> 03/11/1998 The date of the pre-UST removal Workplan for a Soil and Groundwater <br /> Assessment prepared by Aqua Science Engineers(Aqua). <br /> 04/16/1998 The date of Report of Soil and Groundwater Assessment prepared by Aqua. <br /> 12/07/1998 The Site was placed into LOP on this date. <br /> 12/24/1998 On this date, 3 USTs were removed from the site. <br /> 12/31/1998 Soil excavation (300 cubic yards) from the former UST area was completed <br /> by this date. The soil was hauled to Forward Landfill, Manteca, CA. <br /> 04/19/2001 The date of Workplan for a Soil and Groundwater Assessment and <br /> Remediation Feasibility Study prepared by Aqua. <br /> 01/16/2002 The date of Soil and Groundwater Assessment and Corrective Action Plan <br /> prepared by Aqua. <br /> 03/26/2002 The date of Workplan for Ozone-Sparging System Installation and Pilot Test <br /> prepared by Aqua. <br /> 09/17/2003 The date of Report of Ozone-Sparging System 6 Month Operation <br /> prepared by Aqua. <br /> 11/15/2004 The date of Report of Ozone-Sparging 12-Month Operation prepared by <br /> Aqua. <br /> 04/02/2009 The date of Report of Post Ozone-Sparging Confirmation Soil and <br /> Groundwater Assessment prepared by Aqua. <br /> 03/15/2011 The date of No Further Action Recommendation Report Submitted by Aqua. <br />