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Summary of Gauging and Sampling Activities <br /> October 2003 through December 2003 <br /> Former BP Oil 11192 <br /> 1403 Country Club Boulevard <br /> Stockton, CA <br /> Site information <br /> Site Former BP Oil <br /> 1403 Country Club Boulevard <br /> Stockton,CA <br /> Project Coordinator/Phone Number Edward Ralston1916-558-7633 <br /> Groundwater wells onsite 9 <br /> Groundwater wells offsite 3 <br /> Field Activity <br /> Sampling consultant TRC <br /> Date(s)sampled 11/26/03 <br /> Groundwater wells gauged 12 <br /> Groundwater wells sampled 12 <br /> Purging method diaphragm pump <br /> Treatment/disposal method during sampling event OnyxlRodeo Unit 100 <br /> Free product pumpouts other than sampling event Na <br /> Treatment/Disposal method during free product pumpouts WA <br /> Site Hydrogeology <br /> Minimum depth to groundwater(feet bgs) 1529 <br /> Maximum depth to groundwater(feet bgs) 1951 <br /> Average groundwater elevation(feet relative to mean sea level) -1155 <br /> Average change in groundwater elevations since previous event(feet) -087 <br /> Groundwater gradient and flow direction 0 002 ftlfi,northeast <br /> Groundwater Condition(Benzene Maximum Contaminant Level[MCL]=10 pgll) <br /> Wells with benzene concentrations below MCL 12 <br /> Wells with benzene concentrations at or above MCL 0 <br /> Minimum benzene concentration(pg/t) ND <br /> Maximum benzene concentration(pgll) ND <br /> Minimum MTBE concentration(pg11) ND <br /> Maximum MTBE concentration(pgll) 140 <br /> Minimum TPPH concentration(pgll) ND <br /> Maximum TPPH concentration(Vg/1) 160(MW-11) <br /> Groundwater wells with free product 0 <br /> Minimum free product thickness(feet) 0 <br /> Maximum free product thickness(feet) 0 <br /> Additional Information <br /> This report presents the results of groundwater monitoring and sampling activities performed by TRC Please contact the <br /> primary consultant for other specific information on this site <br />