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yw�� <br /> I 1 <br /> y <br /> QUARTERLY GROUND WATER MONITORING REPORT <br /> Top Filling Station <br /> 101 S. Wilson Way <br /> Stockton, Ca <br /> April 1995 <br /> 1.0. INTRODUCTION <br /> In accordance with a request from Mr Ed Endich of Top Filling Station, Advanced <br /> GeoEnvironmental(AGE)has performed quarterly sampling of ground water at 101 S Wilson Way <br /> in Stockton, Califorrua(Figure 1 -Location Map) Thus report details the monitoring and sampling <br /> procedures and presents results of the laboratory analysis <br /> The monitoring and sampling at the site was performed in accordance with Tri-Regional Board and <br /> San Joaquin County Public Health Department - Environmental Health Division (PHS-EHD) <br /> guidelines for investigation of underground storage tank(UST) sites <br /> 2.0. BACKGROUND <br /> 21 SITE LOCATION <br /> The Top Filling Station is located in a flat commercial area of central Stockton, San Joaquin County, <br /> California(Figure 1) The site is located on the southwest corner of the intersection of Wilson Way <br /> and Market Street Two structures are located in the property, the site_currently operates as a <br /> gasoline dispensing station and automobile repair facility <br /> 2 2 UNDERGROUND STORAGE TANK REMOVAL <br /> It is our understanding that two underground storage tanks (USTs) were removed from the site in <br /> 1988 Soil samples were collected beneath each UST and beneath the piping connecting the USTs <br /> to the pump island The samples were analyzed for total petroleum hydrocarbons quanitxfied as <br /> gasoline (TPH-g) and volatile aromatics (benzene, toluene, ethyl benzene and xylenes BTE&X) <br /> TPH-g and BTE&X were detected in the soil samples collected beneath the USTs. at concentrations <br /> ranging from 22 parts per million (ppm) to 2,200 ppm <br /> 23 REMAINING UNDERGROUND STORAGE TANKS <br /> Two fill ports are located on the north side of the gas station office It is possible that two addtional <br />