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' QUARTERLY REPORT <br /> July 1995 <br /> Art & Artists <br /> 204 East Lodi Avenue <br /> Lodi, California <br /> L0. INTRODUCTION <br />' In accordance with a request from Ms. Mary Lehr,Adianced GeoEnvironmental, Inc. (AGE) has <br /> prepared this Quarterly Report of field activities conducted at 204 East Lodi Avenue in Lodi, <br /> California. Two air sparging wells were installed in May 1995; quarterly ground water monitoring <br /> was performed in July 1995; and a soil vapor extraction system was installed in July 1995. 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 />' 2.1. UNDERGROUND STORAGE TANK REMOVAL <br />' One 550-gallon UST was removed from the site in January 1987 by Thorpe Oil, Inc. The UST <br /> contained leaded gasoline, and was located inside the existing structure, near the building's southeast <br /> corner(Figure 2). Total petroleum hydrocarbons quantified as gasoline (TPH-g), toluene and xylenes <br /> were detected in a soil samples collected from beneath the UST at concentrations of 1,400 mg/kg, <br /> 270 mg/kg and 18 mg/kg, respectively. Subsequently, the San Joaquin County Public Health Services <br />' -Environmental Health Division (PHS-EHD) required further investigation at the site to determine, <br /> if ground water had been impacted by the release. <br /> 2.2. SITE ASSESSMENT <br />' In July 1987, three ground water monitoring wells (MW-1, MW-2 and MW-3) were installed at the <br /> site by Weiss Associates. Subsequently, wells MW-2 and MW-3 went "dry" because the water level <br /> dropped below the screened intervals. <br />' To replace wells MW-2 and MW-3, two additional monitoring wells (MW-4 and MW-5) were <br /> installed at the site by Geological Audit Services, Inc. (GeoAudit) in January 1992. In April 1993, <br />' three additional wells (MW-6, MW-7 and MW-8) were installed by GeoAudit to further define the <br /> limits of impacted ground water. Well installation procedures and results were detailed in a Problem <br /> Assessment Report dated January 1994, prepared by GeoAudit. <br /> Analysis of soil samples collected during the installation of MW-I through MW-8 indicated that the <br /> impacted soil was limited to the vicinity of the former UST. <br /> 1 <br />