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1 <br /> QUARTERLY REPORT <br /> GENOVA BAKERY PROJECT <br /> I <br /> 749 Sierra Nevada Street <br /> Stockton, California <br /> IJuly 15, 1993 <br /> 1.0 INTRODUCTION <br /> A project to remediate hydrocarbon-contaminated soil at Genova <br /> Bakery by vapor extraction methods has been ongoing since August <br /> 1 1991. The project is being conducted for the estate of Angelo <br /> Rolleri under the supervision of the San Joaquin County Public <br /> Health Service, Environmental Health Division. This report <br /> documents remediation activities through June 1993 and describes <br /> activities planned for the third quarter of 1993 . <br /> I2 . 0 BACKGROUND <br /> Assessment of hydrocarbon contamination at this site was completed <br /> by Groundwater Technology, Inc. and reported in November 1987 and <br /> October 1988 . A vapor extraction system (VES) was installed in <br /> August 1991 and is operated under permit requirements of the San <br /> Joaquin Air Pollution Control District order number 91-61 . <br /> IRemediation began in 1991, and progress has been summarized in <br /> F reports submitted in March 1992 and February 1993 . As of the end <br /> of 1992 , the VES had been in operation for approximately 8 , 884 <br /> hours, and the mean hydrocarbon vapor concentration at the inlet <br /> was approximately 500 ppm. Since then, the VES has been in <br /> operation for approximately 90 percent of the time, bringing the <br /> total operational hours to 12 , 550 . <br /> The first quarterly report for 1993 proposed the collection and <br /> analysis of a vapor sample from the inlet to the combustion engine <br /> during the second quarter. The objectives of this analysis were to <br /> provide the data necessary to: <br /> 1) Assess the relationship between concentrations of <br /> hydrocarbons being recovered from the inlet stream, as <br /> measured by the PID, and actual concentrations of <br /> gasoline hydrocarbons being removed from the ground; <br /> 2) Determine if aromatic volatile organic compounds are <br /> being removed by the VES, and the concentration of BTE&X <br /> Iin the process stream; <br /> 3 ) Estimate the amount of hydrocarbons initially in the soil <br /> by incorporating in the calculation data from soil <br /> samples collected during the installation of the vapor <br /> extraction well . <br /> I 1 <br />