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Closure Summary Report <br /> November 1996 <br /> LAMMERSVILLE SCHOOL DISTRICT <br /> 16555 West Von Sosten Road, Tracy, California <br /> 10. INTRODUCTION AND SCOPE OF WORK <br /> In accordance with a request from Mr Kenneth Olds of the Lammersville School District (LSD), <br /> Advanced GeoEnvzronmental, Inc (AGE) has prepared this Closure Summary Report (CSR) <br /> detailing the investigation of former underground storage tanks (USTs) located at 16555 West Von <br /> Sosten Road, Tracy, California (the site) <br /> Included in this report are documentation of sampling procedures and analytical results for an <br /> aeration treatment cell and quarterly monitoring for eight existing ground water monitoring wells <br /> in November 1996 The location of the site is illustrated in Figure I -Location Map Structures and <br /> monitoring well locations on the site are illustrated in Figure 2 - Site Plan <br /> I Monitoring and sampling activities and the preparation of this CSR were performed in accordance <br /> with San Joaquin County Public Health Services - Environmental Health Division (PHS-EHD) and <br /> Central Valley Regional Water Quality Control Board guidelines for the investigation of UST sates <br /> 20. BACKGROUND <br /> 21 SITE LOCATION <br /> The property as located at the northwest comer of the intersection of Von Sosten Road and Hansen <br /> Road in a rural area northwest of Tracy an San Joaquin County, California Lammersville Elementary <br /> School is approximately 10 acres an size <br /> The maintenance yard, which is the area of concern, as situated on the eastern portion of the property <br /> along Hansen Road The school yard as located immediately to the west and south of the site A <br /> maintenance garage and house are located near the northeast comer of the site, two under ground <br /> storage tanks (USTs) were formerly located an this area The tanks were used to fuel school vehicles <br /> (Figure 2) <br /> 22 UNDERGROUND STORAGE TANK REMOVALS <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 an December 1986, the diesel UST was removed an March 1989 <br /> Laboratory analysis of samples collected beneath the gasoline UST indicated the presence of <br /> petroleum hydrocarbons—XT�samples were collected beneath the diesel UST following its removal <br /> l <br />