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—� Geological Audit Services, Inc. <br /> 1803 W. March Lane, Suite A •Stockton, CA 95207 • (209)956-0264• FAX (209)956-0700 <br /> vPROPOSED MITIGATION <br /> OF HYDROCARBON—CONTAMINATED SOIL <br /> 1245 W. Weber Avenue <br /> Stockton, CA 95201 <br /> EXECUTIVE SUMMARY <br /> Two underground fuel tanks were removed at Babka Distributing <br /> Company in April, 1991. Laboratory analysis of soil samples <br /> collected from the tank excavation were slightly contaminated with <br /> diesel and gasoline. San Joaquin County Department of Environmental <br /> Health has determined that due to the shallow depth of groundwater <br /> in the area, this contamination poses an unacceptable risk to <br /> public health and must be mitigated. <br /> Falcon Energy Associates and Geological Audit Services have <br /> been retained to assess the extent of contamination and remove it. <br /> A backhoe will be used to excavate the contaminated soil, which <br /> will temporarily be stored on site until laboratoroy analysis of <br /> soil samples from the walls of the cavity have been received. After <br /> the analyses confirm that the contaminated soil has been removed, <br /> the cavity will be filled with clean fill and the contaminated soil <br /> will be transported to a state-certified disposal facility, where <br /> it will be incinerated. <br /> Groundwater monitoring wells will be drilled around the <br /> perimeter of the excavation and water samples will be collected <br /> periodically and analyzed to determine whether the groundwater has <br /> been contaminated. If contamination is found in the groundwater, <br /> the contaminated water will he pumped out and placed in drums for <br /> transport to a recycling facility, where the water will be treated <br /> to remove the hydrocarbons. This process may take several months, <br /> depending on the level of contamination. <br /> NOV 0 8 1991 llvll <br /> ENVIRONMENTAL HEALTH <br /> PERMIT/SERVICES <br /> Environmental Services•Hydrogeology•Geotechnical Services <br />