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l <br /> I <br /> • QUARTERLY REPORT <br /> April 1996 <br /> Top Filling Station <br /> 101 South Wilson Way <br /> Stockton, California <br /> 10. INTRODUCTION <br />' In accordance with the request of Mr Ed Endich, Advanced GeoEnvironmental, Inc (AGE) has <br /> prepared this Quarterly Report for the property at 101 South Wilson Way, Stockton, California The <br /> report summarizes field work performed at the site during April 1996 The location of the site is <br />' illustrated in Figure 1 - Location Map A layout of the property is depicted in Figure 2 - Sae Plan <br /> This report is prepared in accordance with the San Joaquin County Public Health Services - <br />' Environmental Health Division(FHS-EHD) and the Central Valley Regional Water Quality Control <br /> Board (CVRWQCB) guidelines for the investigation of underground storage tank (UST) sites <br />' 20 BACKGROUND <br /> 21 SITE LOCATION <br />' The site is located at 101 S Wilson Way, on the southwest corner of the intersection of Wilson Way <br /> and Market Street, in the city of Stockton, San Joaquin County, California (Figure 1) The site is <br /> located within the northeast quarter of Section 32, Township 1 North, Range 6 East, Mount Diablo <br />' Base and Meridian The Top Filling Station (TFS) operates as a gasoline dispensing station and <br /> automobile repair facility located in an area of low topographic relief in Stockton The surrounding <br /> area is utilized for residential and light industrial purposes <br /> 2 2 UNDERGROUND STORAGE TANK REMOVAL <br /> It is our understanding that two USTs were removed from the site in 1988 Soil samples were <br /> collected beneath each UST and beneath the associated piping The samples were analyzed for total <br /> petroleum hydrocarbons quantified as gasoline (TPH-g) and volatile aromatics (benzene, toluene, <br /> ethyl benzene and xylene BTE&X) TPH-g and BTE&X were detected in the soil samples collected <br /> beneath the USTs at concentrations ranging from 22 parts per million (ppm) to 2,200 ppm <br /> TFS presently utilizes two 10,000-gallon gasoline USTs at the site Approximately two abandoned <br /> USTs are presently located north of the gas station office The fill ports of the abandoned USTs are <br /> blocked approximately eighteen inches below surface grade (bsg), preventing determination of the <br /> volumes of the USTs A plan to remove the abandoned USTs is presently being considered by the <br /> property owners <br />