Laserfiche WebLink
Kennedy/Jenks Consultants <br /> 1.0 INTRODUCTION <br /> This report describes the methods and results of a subsurface investigation conducted on <br /> 16 November 1995 at 445 West Weber Avenue, Stockton, California (the Site). The work <br /> described in this report included the drilling of four soil borings, and the collection and <br /> chemical analysis of soil and groundwater samples. The purpose of the subsurface <br /> investigation was to assess the lateral and vertical extent of petroleum hydrocarbons <br /> previously detected in shallow soil at the Site. The work was performed by Kennedy/Jenks <br /> Consultants (Kennedy/Jenks) on behalf of Stockton Savings Bank in accordance with our <br /> Agreement dated 22 September 1995. <br /> S <br /> J 1.1 Site Location And Description <br /> The Site is located in a commercial area of Stockton, California at the intersection of West <br /> Weber Avenue and Van Buren Street (Figure 1). It is bordered on the north by the <br /> Stockton Channel. The Site consists of an old flour warehouse and a parking lot. The <br /> warehouse has been renovated and contains several shops and restaurants. Figure 2 <br /> 1 illustrates the layout of the Site. <br /> 7D 1.2 Background <br /> Kennedy/Jenks reviewed two reports prepared by Clayton Environmental Consultants <br /> (Clayton 1993; Clayton 1994). Total petroleum hydrocarbons (TPH) as motor oil were <br /> detected in subsurface soil samples collected from the Site. In December 1993, Clayton <br /> collected soil samples from five shallow borings at depths of approximately two to three <br /> feet below ground surface (bgs). TPH, reported by the laboratory as motor oil, was <br /> detected in all five samples at a maximum concentration of 1,200 milligrams per kilogram <br /> F (mg/kg). <br /> The source of the petroleum hydrocarbons detected in these soil samples is not known. <br /> Clayton's five soil borings were located in the vicinity of four, former above ground storage <br /> tanks (ASTs) that reportedly contained crude oil. According to a 1917 Sanborn map <br /> reviewed by Clayton, these tanks were located approximately 250 feet east of the <br /> warehouse building (Clayton 1993). <br /> Clayton also reported two properties in the vicinity that have the potential to impact the <br /> Site: Waterfront Yacht Harbor at 333 Tuleberg Levee and E.F. Mitchler Co. at 400 S. <br /> Lincoln Street. Underground storage tanks (USTs) containing gasoline or diesel were or <br /> are presently located at both of these properties. Kennedy/Jenks reviewed the available <br /> files for the Waterfront Yacht Harbor and E.F. Mitchler Co. properties at the San Joaquin <br /> County Public Health Services Department. Three, 5,000-gallon USTs (one unleaded <br /> gasoline and two diesel) are present on the property owned by Waterfront Yacht Harbor. <br /> In February 1992, RESNA collected soil samples during the relocation of the underground <br /> fuel storage vent line. No petroleum hydrocarbons were detected in the soil samples. At <br /> the E.F. MitchlerP roperty, two, 1,000-gallon USTs containing gasoline were removed in <br /> 1991. According to RESNA, the tanks were in good condition when they were removed. <br /> Four soil samples were collected for laboratory analysis. No petroleum hydrocarbons were <br /> detected in the soil samples except for toluene, which was detected in one of the soil <br /> samples. Because the E.F. Mitchler property is located on the opposite side of Norman <br /> ' islob%951950073.Mrpftubsurf%textdoc 1 <br />