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CLEARWATER <br /> G R O U P, I ISI C <br /> • Environmental Services <br /> 1.0 INTRODUCTION <br /> This document, prepared by Clearwater Group, Inc (Clearwater), presents a Subsurface <br /> Investigation Report for the Barnes Trucking Facility (Barnes Trucking), 1817 South Fresno <br /> Avenue in Stockton, California This report is submitted on behalf of Mr Floyd Barnes of <br /> Barnes Trucking In letters dated September 18, 1992 and April 30, 1996, the San Joaquin <br /> County Public Health Services, Environmental Health Division (EHD) indicated that <br /> additional investigation of this site is required because petroleum hydrocarbons were detected <br /> in soil samples collected from an underground storage tank(UST) excavation <br /> 1.1 Site Description <br /> The Barnes Trucking Facility is on the southwest comer of the intersection of Charter Way <br /> (State Highway 4) and South Fresno Avenue (Figure 1) The property is located <br /> approximately 15 miles south of the Port of Stockton Turning Basin and 0 9 mule east of the <br /> San Joaquin River (Figure 2) <br /> • <br /> Currently, the site is used as a truck dispatch center and parking area There are no fuel <br /> dispensing facilities operating at the site <br /> 1.2 Previous Work <br /> According to an April 30, 1996 letter by Ms Mary Meays of the San Joaquin County EHD, <br /> two USTs were removed from the site on June 15, 1992 Both USTs were 10,000-gallon <br /> capacity tanks that had been used to store diesel fuel <br /> According to the EHD, four soil samples were collected from the bottom of the excavation at a <br /> depth of approximately 16 feet below ground surface (bgs) Soil samples were analyzed for <br /> total petroleum hydrocarbons as gasoline (TPHg) as diesel fuel (TPHd), as kerosene (TPHk), <br /> and as oil (TPHo) Samples were also analyzed for benzene, toluene, ethylbenzene, and <br /> xylenes (BTEX) The highest concentrations of TPHg, TPHd, and BTEX were detected at <br /> 5,700 milligrams per kilogram (mg/kg) TPHg, 50 mg/kg TPHd, and 48 mg/kg benzene <br /> TPHk, and TPHo were not detected in any of the four samples above the laboratory reporting <br /> . limit <br /> 1 <br />