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QUARTERLY REPORT <br /> April 1996 <br /> Art & Artists <br /> 204 East Lodi Avenue <br /> Lodi, California <br /> 1.0. INTRODUCTION <br /> In accordance with a request from Ms Mary Lehr, Advanced GeoEnvironmentaI, Inc (AGE) has <br /> prepared this Quarterly Report of field activities conducted at 204 East Lodi Avenue in Lodi, <br /> California Quarterly ground water monitoring procedures were performed in April 1996, soil borings <br /> were drilled in March 1996, monitoring activities for the m-situ soil vapor extraction and air sparging <br />' systems were performed on a periodical basis for March and April 1996 The location of the site is <br /> illustrated in Figure 1 -Location Map A plan of the site is illustrated in Figure 2 - Site Plan <br />' The above-mentioned activities were performed in accordance with guidelines for investigation of <br /> underground storage tank(UST) sites established by the San Joaquin County - Public Health Services <br /> -Environmental Health Division(PHS-EHD) and the Central Valley Regional Water Quality Control <br /> Board (CVRWQCB) <br /> 2.0. BACKGROUND <br /> 2 1 UNDERGROUND STORAGE TANK REMOVAL <br /> A single 550-gallon UST was removed from the site in January 1987 by Thorpe Oil, Inc The UST <br />' had contained leaded gasoline, and was located inside the existing structure, near the building's <br /> southeast corner (Figure 2) Total petroleum hydrocarbons quantified as gasoline (TPH-g) and <br /> volatile aromatic hydrocarbons(benzene, toluene, ethylbenzene and xylenes BTE&X) were detected <br />' in a soil sample collected beneath the UST Subsequently, the PHS-EHD required further <br /> investigation at the site to determine whether or not ground water had been impacted by the release <br />' 2 2 MONITORING WELL INSTALLATION AND SAMPLING <br />' Between July 1987 and 1993, eight ground water monitoring wells were installed at the site Analysis <br /> of soil samples collected during the installation of the wells indicated that impacted soil was limited <br /> to the vicinity of the former UST <br /> Wells MW-I through MW-3 were initially sampled and analyzed for TPH-g on 13 August 1987 <br /> These wells were again sampled on 08 September 1987 and analyzed for BTE&X No further <br /> sampling was performed between 1987 and October 1992 By 1992, wells NIW-2 and MW-3 went <br /> "dry' because the ground water table dropped below the screened intervals <br />