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r <br /> r <br />' November 27 , 2001 ICES 2289 <br /> r <br /> SUPPLEMENTARY GROUNDWATER INVESTIGATION <br /> INDEPENDENT TRUCKING/DELTA PAPER <br /> STOCKTON, CALIFORNIA <br /> 1 <br /> 1.0 INTRODUCTION <br />' This report presents the findings of a supplementary groundwater <br /> investigation ( "the investigation" ) conducted by Innovative and <br /> Creative Environmental Solutions (ICES) at the Independent <br /> Trucking/Delta Paper facility located at 401 South Lincoln Street <br /> in Stockton, California ( "the Site" , Figure 1) <br />' The purpose of the investigation was to further define the extent <br /> of the petroleum-affected groundwater at the northeastern portion <br /> of the Site The San Joaquin County Environmental Health <br /> Division (SJC-EHD) provided oversight for the groundwater <br /> investigation activities <br />' 2 .0 SITE DESCRIPTION <br />' The Site is located on the west side of South Lincoln Street <br /> between West Sonora and Church Streets Independent Trucking and <br /> the Delta Paper facility formerly occupied the Site <br />' Two adjoining warehouses are located at the northeastern portion <br /> of the Site A trailer is located at the northwest corner of the <br /> Site One conveyor and shredder machine is located at the <br />' western portion of the Site One transformer was located along <br /> the western perimeter of the Site <br />' 3.0 BACKGROUND <br /> A preliminary site investigation was performed by Advanced <br /> GeoEnvironmental Inc in July 1999 A total of two soil samples <br /> and three grab groundwater samples were collected from four <br /> onsite borings at depths ranging from approximately 13 feet to 21 <br />' feet below the existing ground surface (bgs) Based on the <br /> results of the limited site investigation, it appeared that the <br /> underlying sediments and groundwater at the northern portion of <br /> 1 <br /> r <br />