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1 <br /> • Quarterly Monitoring Report - Third and Fourth Quarters '2001 <br /> Mel Bokides Petroleum, Inc. <br /> 501 W. Lodi Avenue, Lodi, California <br /> ' 1.0. INTRODUCTION <br /> At the request of Mr. Nicholas Bokides of Mel Bokides Petroleum, Inc., Advanced <br /> GeoEnvironrnental, Inc. (AGE) has prepared this quarterly monitoring report for 501 W. Lodi <br /> Avenue, Lodi, California (site). The site setting is illustrated on Figure 1. Site structures and <br /> ' monitoring well locations are depicted on Figure 2. <br /> The scope of work was to monitor and sample six ground water monitoring wells on the site, and <br /> ' to sample and monitor the soil vapor extraction system on the site. The objective of the work was <br /> to monitor dissolved petroleum hydrocarbon concentrations in ground water, characterize ground <br /> water flow direction and gradient on the site and to assess the effectiveness of the soil vapor <br /> 1 extraction unit on the site. <br /> A summary of previous investigations at the site was included in the Work Planfor Site Assessment, <br /> Mel Bokides Petroleum, 501 West Lodi Avenue, Lodi, California, dated 15 May 1998,prepared by <br /> AGE. <br /> I• <br /> 2.0. PROCEDURES <br /> ' Field work was conducted and this report prepared in accordance with guidelines issued by the <br /> Central Valley Regional Water Quality Control Board (CVRWQCB) and directives issued by the <br />' San Joaquin County Public Health Services - Environmental Health Division (PHS-EHD) for <br /> subsurface investigations and sampling of ground water monitoring wells at sites with underground <br /> storage tank (UST) system releases. <br /> 2.1. WELL MONITORING AND EVACUATION <br />' On 24 September 2001, the depth to ground water in each monitoring well was measured to the <br /> nearest 0.01-foot utilizing a Solist water level meter. Ground water monitoring wells BMW-1 <br /> 1 through BMW-5 (site wells) and MW-5 (off-site well) were monitored and sampled. The ground <br /> water elevation was then calculated by subtracting the measured depth to ground water from the <br /> surveyed casing elevations (Table 1). Ground water elevations were later plotted and contoured on <br /> a scaled site map (Figure 3). <br /> After water levels were measured, approximately 36 gallons (a minimum of three casing-water <br /> 1 volumes per well) of water were purged from wells BMW-1 and BMW-2 utilizing a Grundfos <br /> submersible pump and approximately 3 to 10 gallons of water were purged from the remaining wells <br /> with dedicated, disposal bailers. <br />' Advanced GeoEnvironmental,Inc. <br /> 1 <br />