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i 02 ! <br /> Historical Groundwater Monitoring and Analytical Data <br /> I <br /> 7 Eleven Store 814117 <br /> 2725 Country Club Boulevard <br /> Stockton CA <br /> 4u i w MtBE 4,2 „�Yl q t-Eth Ae - D ss tW dit <br /> 8020 ItB TBA PIPE EtBE TAME DCAwE©B a 1; angl rta�L L !t E m O <br /> Explanato <br /> TPHg=Total petroleum hydrocarbons-es-gasolina TAME=Tert-amyl-methyl ether TOC=Top of casing elevation in feet above mean sea level <br /> MTBE=Methyl-ten butyl ether 12 DCA=1 2-drd11oroethane pgIL=micrograms per liter <br /> TBA=Tert Butanol EDB=1 2.dsbromoethane mg+L=milligrams per liter <br /> DiPE=Dssopropyl ether DTW=Depth to water —=Not sampled/not measured <br /> ELBE=Ethyl tert-butyl ether SPT=Separate-phase hydrocarbon thickness <br /> WTE=Water table elevation <br /> Notes <br /> Historical data prior to 03117/03 sample date provided by Shaw E&I BTEX TPHg and MtBE analyzed using EPA Method 802018015 Modfied <br /> Samples analyzed by EPA Method 62668 starting veth 03117103 sample date <br /> a=Method Blank Contamination The associated method blank contains the target analyte at a reportable level <br /> b=Matrix Spike/Matnx Spike Duplicate for the analytes Benzene MtBE was affected by the analyte concentrations already present in the un-spiked sample <br /> c=The Method Reporting Liriut for Acetone has been increased due to the presence of an interfering compound <br /> d=Matrix SpikefMatnx Spike Duplicate Results for the analyte MtBE were affected by the anayte concentrations already present in the un-spiked sample <br /> e=Hydrocarbons reported as TPHg do not exhibit a typical Gasoline chromatographic pattern <br /> f=Matrix Spike/Matim Spike Duplicate Results for the analyte Benzene were affected by the anayte concentrations already present in the un-spiked sample <br /> I <br /> 117 Eleven%7 11 Stores114117\Tables114117 Current GramdwateridsHrstoncal Water Page 7 of 7 <br />