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t <br /> SITE CHONOLOGY <br /> 3032 S. EL DORADO STEET, STOCkTON,'CA <br /> APN. 17702002 <br /> LOP SITE CODE: 00014681 <br /> CVRWQCB CASE # 391141 <br /> 10/21/2002 On this date, one 12,000- gallon diesel UST, associated piping, and <br /> dispensers were removed from the site. <br /> 10/26/2002 The soil analytical results for samples collected on 10/21/2002 were <br /> reported and were positive for TPH-diesel. The highest concentration <br /> (2400 mg/kg)was from sample S-4 Trench°,1. This sample was collected <br /> at approximately 4 feet below ground surface (bgs). <br /> 11/08/2002 An Unauthorized Release Report was filed by EHD on this date. The <br /> EHD directed additional work. <br /> 12/13/2002 EHD mailed a NOR to the RP on this date. <br /> 12/16/2002 The site was placed in the LOP and documents were mailed to the RP on <br /> this date. Further investigation and remediation was required by EHD. <br /> 07/30/2003 The contaminated area was over-excavated to approximately 14 feet bgs <br /> and six soil samples were collected for analysis from the final excavation <br /> and contaminated soil stockpile. All the samples were below detection <br /> limits with the exception of the soil stockpile. <br /> 08/22/2003 The date of the Foss Environmental's & Infrastructure's Report of <br /> { Additional Excavation and Confirmation Soil.Sampling Former <br /> Underground Storage Tank Site Bulk Transportation Facility 3032 South <br /> El Dorado Street Stockton, California. <br /> 04/06/2007 NRC collected soil stockpile samples from the bio cell for analysis on this <br /> date. No BTEX was detected, but TPH-diesel was detected at a' <br /> concentration of 22 mg/kg. Stockpile aeration continued and additional <br /> soil samples were to be collected at a later date. <br /> 1 08/10/2009 On this date the soil stockpile was sampled. Two samples were collected <br /> from the bio cell and the tab results were below detection limits for all <br /> analytes. <br /> 08/28/2009 The date of GeoPhase Environmental Site Conceptual Model and <br /> Closure Report. <br /> 09/16/2009 EHD and CVRWQCB staff met to discuss NFAR. 'Both agencies agreed <br /> with the site closure requested by GeoPhase. <br /> f <br /> 02/11/2010 The date EHD received the RTO document from Heritage (RP/property <br /> r <br /> owner) doing business as Bulk Transportation. <br /> 03/3112010 The LOP file processed for preparation and 'mailing of a 30 Day Closure <br /> Concurrence Request Letter to the CVRWQCB. <br /> � t <br />