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Quarterly Report - Second Quarter <br /> Former MEL BOKIDES PETROLEUM - Linden <br /> 8203 East Highway 26, Stockton, California <br /> 10 INTRODUCTION <br /> At the request of Mr Nick Bokldes ofMel Bokldes Petroleum(MBP),Advanced GeoEnvironmental, <br /> IInc (AGE) has prepared this quarterly report for the property located at 8203 East Highway 26, <br /> Stockton, California (site) The scope of work included quarterly ground water monitoring and <br /> preparation of this report The location of the site is illustrated on Figure 1, a plan of the site Is <br /> illustrated on Figure 2 <br />' This report has been prepared in accordance with guidelines issued by the Central Valley Regional <br /> Water Quality Control Board(CVRWQCB)for subsurface investigations of the former underground <br /> storage tank (UST) systems <br /> I <br /> 2.0. BACKGROUND <br /> The site was a former gasoline station and mini-mart On 07 May 1999, three USTs, associated <br /> piping and a dispenser island were removed from the site by Semco of Modesto Six soil samples <br />� . were collected beneath the USTs, two soil samples were collected beneath the dispenser area and <br /> four laboratory composlted soil samples were collected from the excavated soil <br /> Approximately 150 cubic yards of soil were excavated during removal of the USTs, subsequent to <br /> the soil sampling activities, the soil was placed back into the excavation <br /> Laboratory analysis of the soil samples detected total petroleum hydrocarbons quantified as gasoline <br /> (TPH-g)at concentrations up to 17,000 milligrams per kilogram(mg/kg)beneath the northern UST <br /> (Tank#1), benzene, toluene, ethyl benzene and xylenes (BTEX)were detected at concentrations as <br /> high as 3,000,000 micrograms per kilogram (gg/kg) <br /> Methyl tertiary butyl ether (MTBE) and/or tertiary butanol (TBA) were detected in soil samples <br /> collected from the former UST excavation and stockpiled soil at the site at concentrations as high <br /> as 160,000 gg/kg MTBE The presence of high concentrations of MTBE In the soil samples <br /> indicated that an unassessed mass of MTBE remained at the site <br /> 21 INTERIM SOIL REMEDIATION <br /> On 21 March 2000,AGE personnel excavated 195 metric tons of impacted soil from the former tank <br /> I pit utilizing an excavator outfitted with a 2 45 cubic-yard bucket Following the removal of the <br /> original spoil backfill material, the excavation was enlarged and deepened to an approximate depth <br /> of 22 feet bsg, and soil samples were collected from the floor(F-1) and walls (WW, EW, NW and <br /> IAdvanced GeoEnvjronFnLnta1,Inc <br />