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1 <br /> QUARTERLY REPORT <br />' Stewarts Beacon <br /> 515 West 11th Street <br />' Tracy, CA <br /> June 1994 <br /> 1.0 INTRODUCTION <br />' In accordance with a request from Mr William Stewart, Geological Audit Services, Inc <br /> (GeoAudit) has prepared this report summarizing monitoring activities performed during <br />' the second quarter of 1994 at 515 West Eleventh Street in Tracy, California (the site) Mr <br /> Stewart is the former owner of Bill's Batt and Beacon, which operated at the site until 1988 <br /> Four groundwater monitoring wells at the site were sampled during the second quarter The <br />' location of the site is illustrated in Figure 1 A plan of the site is illustrated in Figure 2 <br /> 2.0 BACKGROUND <br /> 21 Site Location <br /> The site is located in a relative] flat <br /> y business/residential area of Tracy, California (Figure <br /> 1) The property is located at the intersection of West Eleventh Street and Bessie Street in <br /> Tracy The site was formerly a Beacon gasoline station, but is presently vacant Plans are <br /> currently underway to construct a new gasoline service station <br /> 2.2 Tank Removal <br /> It is our understanding that three underground storage tanks (UST's) were removed from <br /> the site in 1988 Hydrocarbon contamination was detected in the soil and groundwater <br /> samples collected following the tank removal, indicating that an unauthorized release of <br /> I hydrocarbons had occurred The soil was allowed to aerate for more than a year, and the <br /> tank cavity remained open Assessment of the extent of contamination was subsequently <br /> ordered by the San Joaquin County Public Health Services - Environmental Health Division <br /> (PHS/EHD) <br /> 2.3 Initial Assessment <br /> Three groundwater monitoring wells were installed b Geological Technics of <br /> Y g Modesto, <br /> California (Figure 2) Soil and groundwater samples were collected, and laboratory analyses <br /> 661&STEWART%8MM?j OR 691 1 <br /> E <br />