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CLEARWATER <br />' G R O U P, I N C <br /> • Environmeneel Services <br /> 10 INTRODUCTION <br />' This Well Installation and First Quarter 1999 Groundwater Monitoring Report has been prepared by <br /> Clearwater Group, Inc (Clearwater), on behalf of Mr Floyd Barnes of Barnes Trucking The subject <br /> facility is located at 1817 South Fresno Avenue in Stockton, California In a letter dated August 20, <br /> 1998, the San Joaquin County Public Health Services, Environmental Health Division (EHD) indicated <br />' that additional investigation of this site was required to delineate the downgradient extent of <br /> dissolved-phase petroleum hydrocarbons Clearwater prepared a Workplan for Site Investigation <br />' dated November 18, 1998, detailing the proposed installation of three additional groundwater <br /> monitoring wells EHD approved the workplan and addendum in December 1998 <br />' 11 Site Descnption <br />' The Barnes Trucking Facility is located adjacent to the southwest corner of the intersection of Charter <br /> Way (State Highway 4) and South Fresrio Avenue (Figure 1) The property is located approximately <br /> 15 miles south of the Port of Stockton Turning Basin and 0 9 mile east of the San Joaquin River (Figure <br /> 2) <br /> Currently, the site is used as a truck dispatch center and parking area There are no fuel dispensing <br /> facilities operating at the site <br /> 12 Previous Work <br /> According to an April 30, 1996 letter by Ms Mary Meays of the EHD, two underground storage tanks <br /> (USTs) were removed from the site on June 15, 1992 Both USTs were 10,000-gallon capacity tanks that <br /> 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 depth of <br /> approximately 16 feet below ground surface (bgs) Soil samples were analyzed for total petroleum <br />' hydrocarbons as gasoline (TPHg) as diesel fuel (TPHd), as kerosene (TPHk), and as oil (TPHo) <br /> Samples were also analyzed for benzene, toluene, ethylbenzene, and xylenes (BTEX) The highest <br />' concentrations of TPHg, TPHd, and BTEX were detected at 5,700 milligrams per kilogram (mg/kg) of <br /> TPHg,50 mg/kg of TPHd,and 48 mg/kg of benzene TPHk and TPHo were not detected in any of the four <br />' samples above the laboratory reporting limit <br /> I <br /> C-178 WELL INsr RPT 1 May 7, 1999 <br />