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QUARTERLY REPORT <br /> October 1995 <br /> - Lammersville Elementary School <br /> 16555 West Von Sosten Road <br /> Tracy, California <br /> 1.0. INTRODUCTION AND SCOPE OF WORK <br /> In accordance with a request from Mr Kenneth Olds of the Lammersville School District (LSD), <br /> A&anced GeoEnvironmental, Inc (AGE) has prepared this Quarterly Report detailing field activities <br /> performed at 16555 West Von Sosten Road, Tracy, California (the site) The scope of work included <br /> quarterly monitoring of three existing ground water monitoring wells in October 1995 and the <br /> excavation of hydrocarbon-impacted soil from the former underground storage tank (UST) area in <br /> December 1995 The location of the site is illustrated in Figure 1 -Location Map A plan of the site <br />' is illustrated in Figure 2 - Site Plan <br /> Monitoring and sampling activities were conducted in accordance with San Joaquin County Public <br /> IHealth Services - Environmental Health Division (PHS-EHD) and Central Valley Regional Water <br /> Quality Control Board guidelines for the investigation of UST sites <br /> 2.0. BACKGROUND <br /> 2 1 SITE LOCATION <br /> The site is located at the northwest corner of the intersection of Von Sosten Road and Hansen Road <br /> in a rural area northwest of Tracy in San Joaquin County, California The property is approximately <br /> 10 acres in size and is occupied by Lammersville Elementary School <br /> A maintenance garage and house are located near the northeast corner of the site, two USTs were <br /> formerly located in this area The tanks were used to fuel school vehicles The Lammersville <br /> Elementary School yard is located immediately west and south of the project area <br />' 2 2 UNDERGROUND STORAGE TANK REMOVAL <br /> LSD operated one 550-gallon regular gasoline UST and one 2,000-gallon diesel UST at the site The <br /> gasoline UST was removed in December 1986, the diesel UST was removed in March 1989 <br /> Laboratory analysis of samples collected beneath the gasoline UST indicated a release of <br /> hydrocarbons had occurred, no samples were collected beneath the diesel UST Based upon the <br /> shallow depth to ground water at the site, the PHS-EHD required a subsurface investigation of the <br /> former UST areas <br />